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[68Ga]Ga-RAYZ-8009: A Glypican-3-Targeted Diagnostic Radiopharmaceutical for Hepatocellular Carcinoma Molecular Imaging--A First-in-Human Case Series

To date, the imaging and diagnosis of hepatocellular carcinoma (HCC) rely on CT/MRI, which have well-known limitations. Glypican-3 (GPC3) is a cell surface receptor highly expressed by HCC but not by normal or cirrhotic liver tissue. Here we report initial clinical results of GPC3-targeted PET imaging with [68Ga]Ga-DOTA-RYZ-GPC3 (RAYZ-8009), a peptide-based GPC3 ligand in patients with known or suspected HCC. Methods: [68Ga]Ga-RAYZ-8009 was obtained after labeling the peptide precursor with 68Ga from a 68Ge/68Ga generator and heating at 90°C for 10 min followed by sterile filtration. After administration of [68Ga]Ga-RAYZ-8009, a dynamic or static PET/CT scan was acquired between 45 min and 4 h after administration. Radiotracer uptake was measured by SUVs for the following tissues: suspected or actual HCC or hepatoblastoma lesions, non–tumor-bearing liver, renal cortex, blood pool in the left ventricle, and gastric fundus. Additionally, tumor–to–healthy-liver ratios (TLRs) were calculated. Results: Twenty-four patients (5 patients in the dynamic protocol; 19 patients in the static protocol) were scanned. No adverse events occurred. Two patients had no lesion detected and did not have HCC during follow-up. In total, 50 lesions were detected and analyzed. The mean SUVmax of these lesions was 19.6 (range, 2.7–95.3), and the mean SUVmean was 10.1 (range, 1.0–49.2) at approximately 60 min after administration. Uptake in non–tumor-bearing liver and blood pool rapidly decreased over time and became negligible 45 min after administration (mean SUVmean, <1.6), with a continuous decline to 4 h after administration (mean SUVmean, 1.0). The opposite was observed for HCC lesions, for which SUVs and TLRs continuously increased for up to 4 h after administration. In individual lesion analysis, TLR was the highest between 60 and 120 min after administration. Uptake in the gastric fundus gradually increased for up to 45 min (to an SUVmax of 31.3) and decreased gradually afterward. Conclusion: [68Ga]Ga-RAYZ-8009 is safe and allows for high-contrast imaging of GPC3-positive HCC, with rapid clearance from most normal organs. Thereby, [68Ga]Ga-RAYZ-8009 is promising for HCC diagnosis and staging. Further research is warranted.




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Dual Somatostatin Receptor/18F-FDG PET/CT Imaging in Patients with Well-Differentiated, Grade 2 and 3 Gastroenteropancreatic Neuroendocrine Tumors

Our purpose was to prospectively assess the distribution of NETPET scores in well-differentiated (WD) grade 2 and 3 gastroenteropancreatic (GEP) neuroendocrine tumors (NETs) and to determine the impact of the NETPET score on clinical management. Methods: This single-arm, institutional ethics review board–approved prospective study included 40 patients with histologically proven WD GEP NETs. 68Ga-DOTATATE PET and 18F-FDG PET were performed within 21 d of each other. NETPET scores were evaluated qualitatively by 2 reviewers, with up to 10 marker lesions selected for each patient. The quantitative parameters that were evaluated included marker lesion SUVmax for each tracer; 18F-FDG/68Ga-DOTATATE SUVmax ratios; functional tumor volume (FTV) and metabolic tumor volume (MTV) on 68Ga-DOTATATE and 18F-FDG PET, respectively; and FTV/MTV ratios. The treatment plan before and after 18F-FDG PET was recorded. Results: There were 22 men and 18 women (mean age, 60.8 y) with grade 2 (n = 24) or grade 3 (n = 16) tumors and a mean Ki-67 index of 16.1%. NETPET scores of P0, P1, P2A, P2B, P3B, P4B, and P5 were documented in 2 (5%), 5 (12.5%), 5 (12.5%) 20 (50%), 2 (5%), 4 (10%), and 2 (5%) patients, respectively. No association was found between the SUVmax of target lesions on 68Ga-DOTATATE and the SUVmax of target lesions on 18F-FDG PET (P = 0.505). 18F-FDG/68Ga-DOTATATE SUVmax ratios were significantly lower for patients with low (P1–P2) primary NETPET scores than for those with high (P3–P5) primary NETPET scores (mean ± SD, 0.20 ± 0.13 and 1.68 ± 1.44, respectively; P < 0.001). MTV on 18F-FDG PET was significantly lower for low primary NETPET scores than for high ones (mean ± SD, 464 ± 601 cm3 and 66 ± 114 cm3, respectively; P = 0.005). A change in the type of management was observed in 42.5% of patients after 18F-FDG PET, with the most common being a change from systemic therapy to peptide receptor radionuclide therapy and from debulking surgery to systemic therapy. Conclusion: There was a heterogeneous distribution of NETPET scores in patients with WD grade 2 and 3 GEP NETs, with more than 1 in 5 patients having a high NETPET score and a frequent change in management after 18F-FDG PET. Quantitative parameters including 18F-FDG/68Ga-DOTATATE SUVmax ratios in target lesions and FTV/MTV ratios can discriminate between patients with high and low NETPET scores.




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Quantitative SPECT/CT Metrics in Early Prediction of [177Lu]Lu-DOTATATE Treatment Response in Gastroenteropancreatic Neuroendocrine Tumor Patients

Our objective is to explore quantitative imaging markers for early prediction of treatment response in patients with gastroenteropancreatic neuroendocrine tumors (GEP-NETs) undergoing [177Lu]Lu-DOTATATE therapy. By doing so, we aim to enable timely switching to more effective therapies in order to prevent time-resource waste and minimize toxicities. Methods: Patients diagnosed with unresectable or metastatic, progressive, well-differentiated, receptor-positive GEP-NETs who received 4 sessions of [177Lu]Lu-DOTATATE were retrospectively selected. Using SPECT/CT images taken at the end of treatment sessions, we counted all visible tumors and measured their largest diameters to calculate the tumor burden score (TBS). Up to 4 target lesions were selected and semiautomatically segmented. Target lesion peak counts and spleen peak counts were measured, and normalized peak counts were calculated. Changes in TBS (TBS) and changes in normalized peak count (nPC) throughout treatment sessions in relation to the first treatment session were calculated. Treatment responses were evaluated using third-month CT and were binarized as progressive disease (PD) or non-PD. Results: Twenty-seven patients were included (7 PD, 20 non-PD). Significant differences were observed in TBSsecond-first, TBSthird-first, and TBSfourth-first (where second-first, third-first, and fourth-first denote scan number between the second and first, third and first, and fourth and first [177Lu]Lu-DOTATATE treatment cycles), respectively) between the PD and non-PD groups (median, 0.043 vs. –0.049, 0.08 vs. –0.116, and 0.109 vs. –0.123 [P = 0.023, P = 0.002, and P < 0.001], respectively). nPCsecond-first showed significant group differences (mean, –0.107 vs. –0.282; P = 0.033); nPCthird-first and nPCfourth-first did not reach statistical significance (mean, –0.122 vs. –0.312 and –0.183 vs. –0.405 [P = 0.117 and 0.067], respectively). At the optimal threshold, TBSfourth-first exhibited an area under the curve (AUC) of 0.957, achieving 100% sensitivity and 80% specificity. TBSsecond-first and TBSthird-first reached AUCs of 0.793 and 0.893, sensitivities of 71.4%, and specificities of 85% and 95%, respectively. nPCsecond-first, nPCthird-first, and nPCfourth-first showed AUCs of 0.764, 0.693, and 0.679; sensitivities of 71.4%, 71.4%, and 100%; and specificities of 75%, 70%, and 35%, respectively. Conclusion: TBS and nPC can predict [177Lu]Lu-DOTATATE response by the second treatment session.




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Composite Prediction Score to Interpret Bone Focal Uptake in Hormone-Sensitive Prostate Cancer Patients Imaged with [18F]PSMA-1007 PET/CT

Unspecific bone uptake (UBU) related to [18F]PSMA-1007 PET/CT imaging represents a clinical challenge. We aimed to assess whether a combination of clinical, biochemical, and imaging parameters could predict skeletal metastases in patients with [18F]PSMA-1007 bone focal uptake, aiding in result interpretation. Methods: We retrospectively analyzed [18F]PSMA-1007 PET/CT performed in hormone-sensitive prostate cancer (PCa) patients at 3 tertiary-level cancer centers. A fourth center was involved in performing an external validation. For each, a volume of interest was drawn using a threshold method to extract SUVmax, SUVmean, PSMA tumor volume, and total lesion PSMA. The same volume of interest was applied to CT images to calculate the mean Hounsfield units (HUmean) and maximum Hounsfield units. Clinical and laboratory data were collected from electronic medical records. A composite reference standard, including follow-up histopathology, biochemistry, and imaging data, was used to distinguish between PCa bone metastases and UBU. PET readers with less (n = 2) or more (n = 2) experience, masked to the reference standard, were asked to visually rate a subset of focal bone uptake (n = 178) as PCa metastases or not. Results: In total, 448 bone [18F]PSMA-1007 focal uptake specimens were identified in 267 PCa patients. Of the 448 uptake samples, 188 (41.9%) corresponded to PCa metastases. Ongoing androgen deprivation therapy at PET/CT (P < 0.001) with determination of SUVmax (P < 0.001) and HUmean (P < 0.001) independently predicted bone metastases. A composite prediction score, the bone uptake metastatic probability (BUMP) score, achieving an area under the receiver-operating-characteristic curve (AUC) of 0.87, was validated through a 10-fold internal and external validation (n = 89 bone uptake, 51% metastatic; AUC, 0.92). The BUMP score’s AUC was significantly higher than that of HUmean (AUC, 0.62) and remained high among lesions with HUmean in the first tertile (AUC, 0.80). A decision-curve analysis showed a higher net benefit with the score. Compared with the visual assessment, the BUMP score provided added value in terms of specificity in less-experienced PET readers (88% vs. 54%, P < 0.001). Conclusion: The BUMP score accurately distinguished UBU from bone metastases in PCa patients with [18F]PSMA-1007 focal bone uptake at PET imaging, offering additional value compared with the simple assessment of the osteoblastic CT correlate. Its use could help clinicians interpret imaging results, particularly those with less experience, potentially reducing the risk of patient overstaging.




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Clinical Factors That Influence Repeat 68Ga-PSMA-11 PET/CT Scan Positivity in Patients with Recurrent Prostate Cancer Under Observation After a Negative 68Ga-PSMA-11 PET/CT Scan: A Single-Center Retrospective Study

This analysis aimed to identify clinical factors associated with positivity on repeat 68Ga-PSMA-11 PET/CT after a negative scan in patients with recurrent prostate cancer (PCa) under observation. Methods: This single-center, retrospective analysis included patients who underwent at least 2 68Ga-PSMA-11 PET/CT scans (PET1 and PET2) at UCLA between October 2016 and June 2021 for recurrent PCa with negative PET1 and no PCa-related treatments between the 2 scans. Using Prostate Cancer Molecular Imaging Standardized Evaluation criteria to define negative and positive scans, the final cohort was divided into PET2-negative (PET2-Neg) and PET2-positive (PET2-Pos). The same PET1 was used twice in the more than 2 PET cases with inclusion criteria fulfilled. Patient characteristics and clinical parameters were compared between the 2 cohorts using Mann–Whitney U test and Fisher exact test. Areas under the curve (AUCs) of the receiver operating characteristic and the Youden index were computed to determine the discrimination ability of statistically significant factors and specific cut points that maximized sensitivity and specificity, respectively. Results: The final analysis included 83 sets of 2 PET/CT scans from 70 patients. Thirty-nine of 83 (47%) sets were PET2-Neg, and 44 of 83 (53%) sets were PET2-Pos. Prostate-specific antigen (PSA) increased from PET1 to PET2 for all 83 (100%) sets of scans. Median PSA at PET1 was 0.4 ng/mL (interquartile range, 0.2–1.0) and at PET2 was 1.6 ng/mL (interquartile range, 0.9–3.8). We found higher serum PSA at PET2 (median, 1.8 vs. 1.1 ng/mL; P = 0.015), absolute PSA difference (median, 1.4 vs. 0.7 ng/mL; P = 0.006), percentage of PSA change (median, +270.4% vs. +150.0%: P = 0.031), and median PSA velocity (0.044 vs. 0.017 ng/mL/wk, P = 0.002) and shorter PSA doubling time (DT; median, 5.1 vs. 8.3 mo; P = 0.006) in the PET2-Pos cohort than in the PET2-Neg cohort. Receiver operating characteristic curves showed cutoffs for PSA at PET2 of 4.80 ng/mL (sensitivity, 34%; specificity, 92%; AUC, 0.66), absolute PSA difference of 0.95 ng/mL (sensitivity, 62%; specificity, 71%; AUC, 0.68), percentage of PSA change of a positive 289.50% (sensitivity, 48%; specificity, 82%; AUC, 0.64), PSA velocity of 0.033 ng/mL/wk (sensitivity, 57%; specificity, 80%; AUC, 0.70), and PSA DT of 7.91 mo (sensitivity, 71%; specificity, 62%; AUC, 0.67). Conclusion: Patients with recurrent PCa under observation after a negative 68Ga-PSMA-11 PET/CT scan with markedly elevated serum PSA levels and shorter PSA DT are more likely to have positive findings on repeat 68Ga-PSMA-11 PET/CT.




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Evaluating the Utility of 18F-FDG PET/CT in Cancer of Unknown Primary

Cancer of unknown primary (CUP) represents a heterogeneous group of metastatic tumors for which standardized diagnostic work-up fails to identify the primary site. We aimed to describe the Peter MacCallum Cancer Centre experience with 18F-FDG PET/CT in extracervical CUP with respect to detection of a primary site and its impact on management. A secondary aim was to compare overall survival (OS) in patients with and without a detected primary site. Methods: CUP patients treated between 2014 and 2020 were identified from medical oncology clinics and 18F-FDG PET/CT records. Information collated from electronic medical records included the suspected primary site and treatment details before and after 18F-FDG PET/CT. Clinicopathologic details and genomic analysis were used to determine the clinically suspected primary site and compared against 2 independent masked reads of 18F-FDG PET/CT images by nuclear medicine specialists to determine sensitivity, specificity, accuracy, and the rate of detection of the primary site. Results: We identified 147 patients, 65% of whom had undergone molecular profiling. The median age at diagnosis was 61 y (range, 20–84 y), and the median follow-up time was 74 mo (range, 26–83 mo). Eighty-two percent were classified as having an unfavorable CUP subtype as per international guidelines.18F-FDG PET/CT demonstrated a primary site detection rate of 41%, resulted in a change in management in 22%, and identified previously occult disease sites in 37%. Median OS was 16.8 mo for all patients and 104.7 and 12.1 mo for favorable and unfavorable CUP subtypes, respectively (P < 0.0001). Median OS in CUP patients when using 18F-FDG PET/CT, clinicopathologic, and genomic information was 19.8 and 8.5 mo when a primary site was detected and not detected, respectively (P = 0.016). Multivariable analysis of survival adjusted for age and sex remained significant for identification of a potential primary site (P < 0.001), a favorable CUP (P < 0.001), and an Eastern Cooperative Oncology Group status of 1 or less (P < 0.001). Conclusion: 18F-FDG PET/CT plays a complementary role in CUP diagnostic work-up and was able to determine the likely primary site in 41% of cases. OS is improved with primary site identification, demonstrating the value of access to diagnostic 18F-FDG PET/CT for CUP patients.




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Predicting Pathologic Complete Response in Locally Advanced Rectal Cancer with [68Ga]Ga-FAPI-04 PET, [18F]FDG PET, and Contrast-Enhanced MRI: Lesion-to-Lesion Comparison with Pathology

Neoadjuvant therapy in patients with locally advanced rectal cancer (LARC) has achieved good pathologic complete response (pCR) rates, potentially eliminating the need for surgical intervention. This study investigated preoperative methods for predicting pCR after neoadjuvant short-course radiotherapy (SCRT) combined with immunochemotherapy. Methods: Treatment-naïve patients with histologically confirmed LARC were enrolled from February 2023 to July 2023. Before surgery, the patients received neoadjuvant SCRT followed by 2 cycles of capecitabine and oxaliplatin plus camrelizumab. 68Ga-labeled fibroblast activation protein inhibitor ([68Ga]Ga-FAPI-04) PET/MRI, [18F]FDG PET/CT, and contrast-enhanced MRI were performed before treatment initiation and before surgery in each patient. PET and MRI features and the size and number of lesions were also collected from each scan. Each parameter’s sensitivity, specificity, and diagnostic cutoff were derived via receiver-operating-characteristic curve analysis. Results: Twenty eligible patients (13 men, 7 women; mean age, 60.2 y) were enrolled and completed the entire trial, and all patients had proficient mismatch repair or microsatellite-stable LARC. A postoperative pCR was achieved in 9 patients (45.0%). In the visual evaluation, both [68Ga]Ga-FAPI-04 PET/MRI and [18F]FDG PET/CT were limited to forecasting pCR. Contrast-enhanced MRI had a low sensitivity of 55.56% to predict pCR. In the quantitative evaluation, [68Ga]Ga-FAPI-04 change in SULpeak percentage, where SULpeak is SUVpeak standardized by lean body mass, had the largest area under the curve (0.929) with high specificity (sensitivity, 77.78%; specificity, 100.0%; cutoff, 63.92%). Conclusion: [68Ga]Ga-FAPI-04 PET/MRI is a promising imaging modality for predicting pCR after SCRT combined with immunochemotherapy. The SULpeak decrease exceeding 63.92% may provide valuable guidance in selecting patients who can forgo surgery after neoadjuvant therapy.




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Whole-Body HER2 Heterogeneity Identified on HER2 PET in HER2-Negative, -Low, and -Positive Metastatic Breast Cancer

Understanding which patients with human epidermal growth factor receptor 2 (HER2)–negative or –low metastatic breast cancer (MBC) benefit from HER2-targeted strategies is urgently needed. We assessed the whole-body heterogeneity of HER2 expression on 89Zr-trastuzumab PET (HER2 PET) and the diagnostic performance of HER2 PET in a large series of patients, including HER2-negative and -low MBC. Methods: In the IMPACT-MBC study, patients with newly diagnosed and nonrapidly progressive MBC of all subtypes were included. Metastasis HER2 status was determined by immunohistochemistry and in situ hybridization.89Zr-trastuzumab uptake was quantified as SUVmax and SUVmean. HER2 immunohistochemistry was related to the quantitative 89Zr-trastuzumab uptake of all metastases and corresponding biopsied metastasis, uptake heterogeneity, and qualitative scan evaluation. A prediction algorithm for HER2 immunohistochemistry positivity based on uptake was developed. Results: In 200 patients, 89Zr-trastuzumab uptake was quantified in 5,163 metastases, including 186 biopsied metastases. With increasing HER2 immunohistochemistry status, uptake was higher (geometric mean SUVmax of 7.0, 7.6, 7.3, and 17.4 for a HER2 immunohistochemistry score of 0, 1, 2, or 3+, respectively; P < 0.001). High uptake exceeding 14.6 (90th percentile) was observed in one third of patients with a HER2-negative or -low metastasis biopsy. The algorithm performed best when lesion site and size were incorporated (area under the curve, 0.86; 95% CI, 0.79–0.93). Conclusion: HER2 PET had good diagnostic performance in MBC, showing considerable whole-body HER2 heterogeneity and uptake above background in HER2-negative and -low MBC. This provides novel insights into HER2-negative and -low MBC compared with standard HER2 immunohistochemistry on a single biopsy.




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Diagnostic Accuracy of [18F]FDG PET/MRI in Head and Neck Squamous Cell Carcinoma: A Systematic Review and Metaanalysis

This study evaluates the diagnostic utility of PET/MRI for primary, locoregional, and nodal head and neck squamous cell carcinoma (HNSCC) through systematic review and metaanalysis. Methods: A systematic search was conducted using PubMed and Scopus to identify studies on the diagnostic accuracy of PET/MRI for HNSCC. The search included specific terms and excluded nonhybrid PET/MRI studies, and those with a sample size of fewer than 10 patients were excluded. Results: In total, 15 studies encompassing 638 patients were found addressing the diagnostic test accuracy for PET/MRI within the chosen subject domain. Squamous cell carcinoma of the nasopharynx was the most observed HNSCC subtype (n = 198). The metaanalysis included 12 studies, with pooled sensitivity and specificity values of 93% and 95% per patient for primary disease evaluation, 93% and 96% for locoregional evaluation, and 89% and 98% per lesion for nodal disease detection, respectively. An examination of a subset of studies comparing PET/MRI against PET/CT or MRI alone for evaluating nodal and locoregional HNSCC found that PET/MRI may offer slightly higher accuracy than other modalities. However, this difference was not statistically significant. Conclusion: PET/MRI has excellent potential for identifying primary, locoregional, and nodal HNSCC.




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Development of 18F-Fluoromisonidazole Hypoxia PET/CT Diagnostic Interpretation Criteria and Validation of Interreader Reliability, Reproducibility, and Performance

Tumor hypoxia, an integral biomarker to guide radiotherapy, can be imaged with 18F-fluoromisonidazole (18F-FMISO) hypoxia PET. One major obstacle to its broader application is the lack of standardized interpretation criteria. We sought to develop and validate practical interpretation criteria and a dedicated training protocol for nuclear medicine physicians to interpret 18F-FMISO hypoxia PET. Methods: We randomly selected 123 patients with human papillomavirus–positive oropharyngeal cancer enrolled in a phase II trial who underwent 123 18F-FDG PET/CT and 134 18F-FMISO PET/CT scans. Four independent nuclear medicine physicians with no 18F-FMISO experience read the scans. Interpretation by a fifth nuclear medicine physician with over 2 decades of 18F-FMISO experience was the reference standard. Performance was evaluated after initial instruction and subsequent dedicated training. Scans were considered positive for hypoxia by visual assessment if 18F-FMISO uptake was greater than floor-of-mouth uptake. Additionally, SUVmax was determined to evaluate whether quantitative assessment using tumor-to-background ratios could be helpful to define hypoxia positivity. Results: Visual assessment produced a mean sensitivity and specificity of 77.3% and 80.9%, with fair interreader agreement ( = 0.34), after initial instruction. After dedicated training, mean sensitivity and specificity improved to 97.6% and 86.9%, with almost perfect agreement ( = 0.86). Quantitative assessment with an estimated best SUVmax ratio threshold of more than 1.2 to define hypoxia positivity produced a mean sensitivity and specificity of 56.8% and 95.9%, respectively, with substantial interreader agreement ( = 0.66), after initial instruction. After dedicated training, mean sensitivity improved to 89.6% whereas mean specificity remained high at 95.3%, with near-perfect interreader agreement ( = 0.86). Conclusion: Nuclear medicine physicians without 18F-FMISO hypoxia PET reading experience demonstrate much improved interreader agreement with dedicated training using specific interpretation criteria.




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Association Between CA 15-3 and 18F-FDG PET/CT Findings in Recurrent Breast Cancer Patients at a Tertiary Referral Hospital in Kenya

The tumor marker cancer antigen 15-3 (CA 15-3) is that most commonly used to monitor metastatic breast cancer during active therapy and surveillance for disease recurrence after treatment. The association of CA 15-3 and 18F-FDG PET/CT findings can be considered complementary, since any significant rise may indicate the presence of disease and imaging is able to map the tumor sites. Although current guidelines do not recommend the routine performance of CA 15-3 in asymptomatic patients being followed up after definitive breast cancer treatment, most oncologists perform serial assessment of the tumor markers as part of routine follow-up of patients. The aim of this study was to evaluate the correlation between CA 15-3 levels and 18F-FDG PET/CT scan findings in patients with recurrent breast cancer. Methods: This was a cross-sectional study with data collected retrospectively. Patients being evaluated for breast cancer recurrence with 18F-FDG PET/CT imaging and CA 15-3 level were included. Evaluation of the association between CA 15-3 levels and 18F-FDG PET/CT scan findings was then done. Results: In total, 154 cases were included in this study; 62 patients had recurrence (positive) on the 18F-FDG PET/CT scans, whereas 92 patients had normal (negative) findings on follow-up 18F-FDG PET/CT scans. There was an association between CA 15-3 levels and the presence or absence of recurrence on 18F-FDG PET/CT scans, with 84.4% (27/32) of patients who had elevated CA 15-3 levels having disease recurrence on 18F-FDG PET/CT and 84.4% (27/32) of patients who had elevated CA 15-3 levels having disease recurrence on 18F-FDG PET/CT as well as a correlation with the burden of metastases. Most patients with disease recurrence on 18F-FDG PET/CT, however, had normal CA 15-3 levels. Conclusion: Higher CA 15-3 levels correlate with breast cancer recurrence on 18F-FDG PET/CT as well as with burden of metastasis. Notably, CA 15-3 levels within the reference range do not exclude breast cancer disease recurrence since more than half of patients with recurrence had normal CA 15-3 levels. 18F-FDG PET/CT should therefore be considered in patients with suspected breast cancer recurrence but normal CA 15-3 levels.




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1,090 Publications and 5 Years Later: Is FAP-Targeted Theranostics Really Happening?




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Navigating the Future of Prostate Cancer Care: AI-Driven Imaging and Theranostics Through the Lens of RELAINCE




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Is ChatGPT a Reliable Ghostwriter?




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EU-Turkey Customs Union: Prospects for Modernization and Lessons for Brexit

EU-Turkey Customs Union: Prospects for Modernization and Lessons for Brexit 12 December 2018 — 12:30PM TO 1:30PM Anonymous (not verified) 26 November 2018 Chatham House | 10 St James's Square | London | SW1Y 4LE

Turkey and the EU have been in a customs union since 1995. Both sides recognize that the current agreement is in need of modernization and have agreed to open negotiations to expand its scope to include services, public procurement, agriculture and other elements that would help bring it into the 21st century.

At the same time, the UK Parliament is debating whether to approve the agreement on the UK’s withdrawal from the EU. It includes a backstop which – if triggered – would keep the UK and the EU in a single customs territory which would limit the disruption of withdrawal but hamper Britain’s ability to pursue an independent trade policy. The political declaration proposes building on this customs arrangement as the basis for the future relationship.

In this context, the speaker will discuss the current EU-Turkey customs union arrangement and its shortcomings, examine the prospects for its modernization and share his insights on the lessons for the UK’s future trading relationship with the EU.

The event will launch the briefing paper ‘EU-Turkey Customs Union: Prospects for Modernization and Lessons for Brexit’.

Attendance at this event is by invitation only.




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Turkey in 2020 and Beyond: What Lies Ahead for Turkish Politics?

Turkey in 2020 and Beyond: What Lies Ahead for Turkish Politics? 25 November 2019 — 12:30PM TO 1:30PM Anonymous (not verified) 6 November 2019 Chatham House | 10 St James's Square | London | SW1Y 4LE

Turkey witnessed some major developments over the last year. In August 2018, the dramatic Lira devaluation caused the Turkish economy to go into recession. In the 2019 local elections, which took place during the economic downturn, the Republican Peoples’ Party (CHP) mayoral candidates took control of Ankara and Istanbul after 25 years of dominance by the ruling Justice and Development Party (AKP).

The election results might lead to a rethink of the AKP leadership and consequences on Turkish politics will depend on Erdoğan’s interpretation of this reversal of his political fortune.

Will this affect the long-standing alliance between AKP and MHP that has characterised Turkish foreign policy for the past few years? What impact will this have on both the domestic and international level? Finally, will Turkey’s recent incursion into Syria have lasting effect on the country’s alliances with other powers and its standing?

In this context, the speaker will analyse the significance of these changes and the future trajectory of Turkish politics, economics and foreign policy.




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Turkey-Russia Relations: A Marriage of Convenience?

Turkey-Russia Relations: A Marriage of Convenience? 26 November 2020 — 12:00PM TO 1:30PM Anonymous (not verified) 17 November 2020 Chatham House

Speakers discuss the complex but, so far, durable ties between Putin and Erdogan and the perspectives of each leader. Other issues will include the impact of the Biden presidency and the unfolding situation in Nagorny Karabakh.

This is an online only event

Russia-Turkey relations are governed by a unique dynamic between presidents Vladimir Putin and Recep Tayyip Erdogan. They pursue contrasting objectives in Libya, the Eastern Mediterranean, Caucasus and Ukraine; yet they have managed to compartmentalize their differences to avoid any spill-over into diplomatic, military and economic cooperation.

Erdogan purchased the Russian S400 missile defence system at the cost of ejection from the US-led fourth generation F35 stealth fighter programme; and at the risk of sanctions by Washington. Russia is also proceeding with the construction of the Akkuyu Nuclear Power Plant near Turkey’s Mediterranean coast.




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Turkey’s foreign and domestic policy: A story of mutual creation?

Turkey’s foreign and domestic policy: A story of mutual creation? 1 November 2022 — 2:00PM TO 3:00PM Anonymous (not verified) 12 October 2022 Online

Panellists discuss the link between Turkey’s domestic and foreign policies under President Erdoğan.

From Turkey’s ongoing rapprochement with its erstwhile Middle Eastern antagonists to its Syria policy and earlier approach towards the West, there has been extensive discussion on the domestic drivers behind Ankara’s foreign policy.

Less discussed but no less important is how Turkish foreign affairs have shaped its internal politics. Under the rule of the Justice and Development Party (AKP) government and President Recep Tayyip Erdoğan, Turkey’s foreign and domestic policies have mutually reshaped each other.

In this webinar, launching Gönül Tol’s new book Erdoğan’s War: A Strongman’s Struggle at Home and in Syria, panellists will take stock of how Turkey’s domestic and foreign policies under the leadership of President Erdoğan have influenced and shaped each other. Speakers will also discuss the internal drivers behind Turkey’s current reset in relations with the Middle East, and examine how Ankara’s foreign affairs play into the country’s political and identity fault lines.

The event will be held on the record and will be live-streamed on the MENA Programme’s Facebook page.




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Medical supply company McKesson to pay more than $400K over discriminatory hiring

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U.S., South Korea agree to greater cooperation on civil nuclear energy

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Election Day anticipation boosts Trump Media stock 15%

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Federal Reserve to announce potential rate cut decision Thursday

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Stellantis trimming 1,100 jobs at its Toledo Jeep Gladiator plant

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Australia to legislate social media ban for those under 16

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Nissan to cut 9,000 jobs, reduce capacity by 20% as it faces 'severe situation'

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Qantas flight lands safely at Sydney after suffering engine failure during takeoff

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More than 500,000 space heaters sold on Amazon recalled

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Tesla regains $1 trillion in market capitalization in post-election surge

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Trump calls rumors he may sell $3.5B Trump Media stake 'illegal,' calls for investigation

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Mattel apologizes for misprint on 'Wicked' doll packaging that links to porn website

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SS United States to be towed from Phila., launching transition into artificial reef

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Report: SpaceX signs battery deal with South Korea-based LG Energy Solution to power Starship

SpaceX has reportedly struck a deal with LG Energy Solution Ltd. to supply cylindrical lithium-ion batteries for Elon Musk's Starship rocket, expected to launch early next year, according to industry sources.




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Private prison stocks soar after Trump names Tom Homan 'border czar'

Private prison stocks soared Monday after President-elect Donald Trump announced immigration hardliner Tom Homan as the nation's next "border czar." GeoGroup jumped 4.5%, while CoreCivic increased 6.3%.




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Five additional monkeys from S.C. research lab recovered; 13 remain at large

An additional five rhesus macaque monkeys that escaped from a South Carolina research facility last week have been recovered, meaning about a dozen of the rhesus macaque primates remain at large.




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11 hospitalized after explosion at Louisville food-coloring factory

An explosion at a food-coloring factory in Louisville, Ky., hospitalized at least 11, including two in critical condition, on Tuesday afternoon.




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HPC System Administrator

HPC System Administrator University of California Los Angeles Budgeted Pay Scale: Full Salary Range: USD $76,200.00/Yr. - USD $158,800.00/Yr. Department Summary UCLAs Office of Advanced Research Computing (OARC) melds expert staff and technical infrastructure to amplify and accelerate the impact of UCLA research in the age of networked data and computation. OARC expertise and resources are available to all UCLA researchers, who are engaged in digital research and scholarship. We work with faculty, student, and postdoctoral researchers; instructors; and staff and administrators. OARC is a relationship-building organization. We enable digital scholarship through collaborations, partnerships, and networked communities to advance cutting-edge research capabilities at UCLA and beyond. OARC supports and enhances the university mission of education, research, and service through the development and execution of innovative and sustainable technology practices, programs, services, infrastructure, policies, and partnerships. Position Summary HPC System Administrator UCLAs Office of Advanced Research Computing (OARC) supports and enhances the university mission of education, research, and service through the development and execution of innovative and sustainable technology practices, programs, services, infrastructure, policies, and partnerships. The OARC High Performance Computing (HPC) Systems Research Technology Group (RTG) supports thousands of UCLA researchers and over 300 research groups through consultation and the operation of the Hoffman2 High Performance Research Cluster. More information on the Hoffman2 cluster may be found at Hoffman2 Cluster Documentation The Hoffman2 cluster environment consists of approximately 1000 compute nodes, GPU nodes, high speed networking, high-performance storage, backup equipment, and extensive hardware and software support infrastructure, spread across multiple data centers. The HPC System Administrator, as part of the HPC team, will serve as a technical expert supporting OARCs HPC environment in the areas of systems and application software development, HPC cluster system administration and management of the backup system environment. Requires the ability to work from UCLAs Westwood campus as operational demands dictate. FlexWork / hybrid schedules will be considered based on work demands and operational needs. Salary & Compensation *UCLA provides a full pay range. Actual salary offers consider factors, including budget, prior experience, skills, knowledge, abilities, education, licensure and certifications, and other business considerations. Salary offers at the top of the range are not common. Visit https://ucnet.universityofcalifornia.edu/compensation-and-benefits/index.html to discover benefits that start on day one, and https://ucnet.universityofcalifornia.edu/compensation-and-benefits/total-compensation-calculator.html to calculate the total compensation value with benefits. Qualifications • 3 years Experience with software and applications development, Linux system administration, and two or more modern programming languages (e.g. Python, C++, Java). (Required) • Expert knowledge of Python, SQL, bash, git, and associated build systems, libraries, and development tools. Demonstrated knowledge of common programming paradigms (e.g., asynchronous, concurrent, and object-oriented). Demonstrated ability to create high-quality system tools and software. (Required) • Ability to work independently or in a development team, and effectively estimate time and effort required to complete tasks. Ability to analyze, benchmark, debug, and test software in a technically sound manner and to generate clear, readable reports and summaries. (Required) • Demonstrated working knowledge of HPC cluster architectures and concepts (e.g., provisioning, benchmarking, scalability, and parallelizing code) and ability to stay current with industry best practices. (Required) • Detailed knowledge of Red Hat Enterprise Linux and related distributions. Solid system administration skills including scripting, pipelines, and UNIX operating system fundamentals. (Required) • Working knowledge of protocols, applications, and formats including, but not limited to, TCP/IP, HTTP, DHCP, SSH, NFS, JSON, XML, and HTML. (Required) • Demonstrated ability to troubleshoot and debug computing problems including, corrupted data, file management, application software, and operating system problems. Accurately, and independently respond to production problems in multiple complex operating systems and software components. (Required) • Knowledge of validation, verification, and disaster recovery capabilities for both hardware and software. (Required) • Demonstrated skill in writing well-organized, complete, and technically and grammatically correct documents and procedures to be used by technical and non-technical personnel of diverse backgrounds at various levels in the organization, including researchers, peers, and management. (Required) • Demonstrated oral communication and presentation skills sufficient to effectively obtain and impart technical information and explain concepts on a one-to-one basis as well as in meetings with or presentations to multiple clients. (Required) • Demonstrated problem-solving skills and the ability to break down and define complex problems, formulate solutions, identify cause and effect relationships, make appropriate decisions, and communicate concepts clearly and appropriately with researchers and peers. (Required) • Ability to prioritize tasks, prepare project plans, schedules, effectively manage projects in areas of responsibility, complete tasks, projects in a timely manner. Work effectively both independently and as part of a team, follow through follow through on assignments with minimal direction. (Required) • Demonstrated skill in establishing and maintaining cooperative working relationships with staff, students, and vendors. Ability to communicate and interact effectively with persons of diverse backgrounds. (Required) Education, Licenses, Certifications & Personal Affiliations • Bachelors Degree Bachelors degree in computer science, software engineering, or a related field. (Required) And • Masters Degree Masters degree in computer science, software engineering or a related field . (Preferred) Special Conditions for Employment • Background Check: Continued employment is contingent upon the completion of a satisfactory background investigation. • Live Scan Background Check: A Live Scan background check must be completed prior to the start of employment. • COVID and Flu Vaccinations: The position is subject to providing evidence of inoculation. Schedule 8:00 am to 5:00 pm Union/Policy Covered 99-Policy Covered To apply, please visit: https://apptrkr.com/5770145 Application Deadline: 8:50 p.m. on Copyright ©2024 Jobelephant.com Inc. All rights reserved. https://www.jobelephant.com/




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Supermicro Introduces JBOF Storage Platform Powered by NVIDIA BlueField-3 for Scalable AI and HPC

SAN JOSE, Calif., Oct. 16, 2024 — Supermicro, Inc. is launching a new optimized storage system for high performance AI training, inference and HPC workloads. This JBOF (Just a Bunch […]

The post Supermicro Introduces JBOF Storage Platform Powered by NVIDIA BlueField-3 for Scalable AI and HPC appeared first on HPCwire.




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NextSilicon Launches Maverick-2, Introducing Software-Defined Acceleration for HPC Workloads

TEL AVIV, Israel and MINNEAPOLIS, Oct. 30, 2024 — NextSilicon, a pioneer in high-performance computing (HPC) innovation, today announced its emergence from stealth with the launch of Maverick-2, the industry’s first […]

The post NextSilicon Launches Maverick-2, Introducing Software-Defined Acceleration for HPC Workloads appeared first on HPCwire.




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SNIA to Lead Panel on AI and HPC Innovation Standards at SC24

Oct. 31, 2024 — SNIA is pleased to return to SC24 as part of the Open Standards Pavilion, Booth 1815. At SC24, five SNIA groups and six SNIA Alliance and Collaboration […]

The post SNIA to Lead Panel on AI and HPC Innovation Standards at SC24 appeared first on HPCwire.




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American woman killed in Budapest allegedly by man she met on vacation

An American woman who was traveling in Hungary was killed in Budapest last week allegedly by a man she met on vacation.




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Ukraine says it intercepts radio communications from North Korean soldiers in Russia

Ukraine's military intelligence has intercepted what it claims are radio communications between North Korean soldiers in Russia, amid media reports of a massive troop buildup ahead of an attack in the Kursk region.




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At least 56 people, including 20 children, killed in Israeli airstrikes in Lebanon and Gaza

Dozens of people were killed in Israeli military strikes on northern Lebanon and the Gaza strip, including as many as 20 children, authorities said.




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North Korea ratifies landmark defense pact with Russia

North Korea ratified a defense treaty with Russia, state media reported Tuesday, formally deepening military cooperation that has seen Pyongyang send thousands of troops to help Moscow in its war against Ukraine.





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ISC Opens Nominations for 2025 Jack Dongarra Early Career Award in HPC

Oct. 16, 2024 — The ISC High Performance Jack Dongarra Early Career Award and Lecture Series is an annual event that honors the remarkable contributions of Professor Jack Dongarra to […]

The post ISC Opens Nominations for 2025 Jack Dongarra Early Career Award in HPC appeared first on HPCwire.




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UC San Diego Doctoral Graduate Recognized for Achievement in Astronomy

Oct. 17, 2024 — UC San Diego Alumnus Roman Gerasimov, who recently earned his doctorate from the university, has received the International Astronomical Union (IAU) Stars and Stellar Physics Division Award […]

The post UC San Diego Doctoral Graduate Recognized for Achievement in Astronomy appeared first on HPCwire.




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PNNL-Microsoft Collaborate on Cloud Computing for Chemistry, More to Come

RICHLAND, Wash.—Some computing challenges are so big that it’s necessary to go all in. That’s the approach a diverse team of scientists and computing experts led by the Department of Energy’s […]

The post PNNL-Microsoft Collaborate on Cloud Computing for Chemistry, More to Come appeared first on HPCwire.



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  • Pacific Northwest National Laboratory

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Google Cloud and Oracle Veteran Amit Zavery to Spearhead Product and Engineering at ServiceNow

SANTA CLARA, Calif., Oct. 25, 2024 — ServiceNow has announced that enterprise software industry veteran Amit Zavery will join the company as president, chief product officer (CPO), and chief operating officer […]

The post Google Cloud and Oracle Veteran Amit Zavery to Spearhead Product and Engineering at ServiceNow appeared first on HPCwire.




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Dallas Cowboys trade for Carolina Panthers wide receiver Jonathan Mingo

The Dallas Cowboys agreed to trade a fourth-round pick in the 2025 NFL Draft to the Carolina Panthers in exchange for wide receiver Jonathan Mingo and a seventh-round pick, a league source told UPI on Tuesday.




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College Football Playoff: Oregon, Ohio State, Georgia, Miami top first rankings

Oregon, Ohio State, Georgia and Miami lead the first edition of the 2024-25 College Football Playoff rankings, the selection committee announced.