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Reliability of CT Angiography in Cerebral Vasospasm: A Systematic Review of the Literature and an Inter- and Intraobserver Study [INTERVENTIONAL]

BACKGROUND AND PURPOSE:

Computed tomography angiography offers a non-invasive alternative to DSA for the assessment of cerebral vasospasm following subarachnoid hemorrhage but there is limited evidence regarding its reliability. Our aim was to perform a systematic review (Part I) and to assess (Part II) the inter- and intraobserver reliability of CTA in the diagnosis of cerebral vasospasm.

MATERIALS AND METHODS:

In Part I, articles reporting the reliability of CTA up to May 2018 were systematically searched and evaluated. In Part II, 11 raters independently graded 17 arterial segments in each of 50 patients with SAH for the presence of vasospasm using a 4-category scale. Raters were additionally asked to judge the presence of any moderate/severe vasospasm (≥ 50% narrowing) and whether findings would justify augmentation of medical treatment or conventional angiography ± balloon angioplasty. Four raters took part in the intraobserver reliability study.

RESULTS:

In Part I, the systematic review revealed few studies with heterogeneous vasospasm definitions. In Part II, we found interrater reliability to be moderate at best ( ≤ 0.6), even when results were stratified according to specialty and experience. Intrarater reliability was substantial ( > 0.6) in 3/4 readers. In the per arterial segment analysis, substantial agreement was reached only for the middle cerebral arteries, and only when senior raters’ judgments were dichotomized (presence or absence of ≥50% narrowing). Agreement on the medical or angiographic management of vasospasm based on CTA alone was less than substantial ( ≤ 0.6).

CONCLUSIONS:

The diagnosis of vasospasm using CTA alone was not sufficiently repeatable among observers to support its general use to guide decisions in the clinical management of patients with SAH.




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Discrimination between Glioblastoma and Solitary Brain Metastasis: Comparison of Inflow-Based Vascular-Space-Occupancy and Dynamic Susceptibility Contrast MR Imaging [FUNCTIONAL]

BACKGROUND AND PURPOSE:

Accurate differentiation between glioblastoma and solitary brain metastasis is of vital importance clinically. This study aimed to investigate the potential value of the inflow-based vascular-space-occupancy MR imaging technique, which has no need for an exogenous contrast agent, in differentiating glioblastoma and solitary brain metastasis and to compare it with DSC MR imaging.

MATERIALS AND METHODS:

Twenty patients with glioblastoma and 22 patients with solitary brain metastasis underwent inflow-based vascular-space-occupancy and DSC MR imaging with a 3T clinical scanner. Two neuroradiologists independently measured the maximum inflow-based vascular-space-occupancy–derived arteriolar CBV and DSC-derived CBV values in intratumoral regions and peritumoral T2-hyperintense regions, which were normalized to the contralateral white matter (relative arteriolar CBV and relative CBV, inflow-based vascular-space-occupancy relative arteriolar CBV, and DSC-relative CBV). The intraclass correlation coefficient, Student t test, or Mann-Whitney U test and receiver operating characteristic analysis were performed.

RESULTS:

All parameters of both regions had good or excellent interobserver reliability (0.74~0.89). In peritumoral T2-hyperintese regions, DSC-relative CBV (P < .001), inflow-based vascular-space-occupancy arteriolar CBV (P = .001), and relative arteriolar CBV (P = .005) were significantly higher in glioblastoma than in solitary brain metastasis, with areas under the curve of 0.94, 0.83, and 0.72 for discrimination, respectively. In the intratumoral region, both inflow-based vascular-space-occupancy arteriolar CBV and relative arteriolar CBV were significantly higher in glioblastoma than in solitary brain metastasis (both P < .001), with areas under the curve of 0.91 and 0.90, respectively. Intratumoral DSC-relative CBV showed no significant difference (P = .616) between the 2 groups.

CONCLUSIONS:

Inflow-based vascular-space-occupancy has the potential to discriminate glioblastoma from solitary brain metastasis, especially in the intratumoral region.




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Brain Metastases: Insights from Statistical Modeling of Size Distribution [ADULT BRAIN]

BACKGROUND AND PURPOSE:

Brain metastases are a common finding on brain MRI. However, the factors that dictate their size and distribution are incompletely understood. Our aim was to discover a statistical model that can account for the size distribution of parenchymal metastases in the brain as measured on contrast-enhanced MR imaging.

MATERIALS AND METHODS:

Tumor volumes were calculated on the basis of measured tumor diameters from contrast-enhanced T1-weighted spoiled gradient-echo images in 68 patients with untreated parenchymal metastatic disease. Tumor volumes were then placed in rank-order distributions and compared with 11 different statistical curve types. The resultant R2 values to assess goodness of fit were calculated. The top 2 distributions were then compared using the likelihood ratio test, with resultant R values demonstrating the relative likelihood of these distributions accounting for the observed data.

RESULTS:

Thirty-nine of 68 cases best fit a power distribution (mean R2 = 0.938 ± 0.050), 20 cases best fit an exponential distribution (mean R2 = 0.957 ± 0.050), and the remaining cases were scattered among the remaining distributions. Likelihood ratio analysis revealed that 66 of 68 cases had a positive mean R value (1.596 ± 1.316), skewing toward a power law distribution.

CONCLUSIONS:

The size distributions of untreated brain metastases favor a power law distribution. This finding suggests that metastases do not exist in isolation, but rather as part of a complex system. Furthermore, these results suggest that there may be a relatively small number of underlying variables that substantially influence the behavior of these systems. The identification of these variables could have a profound effect on our understanding of these lesions and our ability to treat them.




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Polymorphous Low-Grade Neuroepithelial Tumor of the Young as a Partially Calcified Intra-Axial Mass in an Adult [RADIOLOGY-PATHOLOGY CORRELATION]

SUMMARY:

Polymorphous low-grade neuroepithelial tumors of the young (PLNTYs) are recently described CNS tumors. Classically, PLNTYs are epileptogenic and are a subtype of a heterogeneous group of low-grade neuroepithelial tumors that cause refractory epilepsy, such as angiocentric gliomas, oligodendrogliomas, gangliogliomas, and pleomorphic xanthoastrocytomas. Although they are a relatively new entity, a number of imaging and histologic characteristics of PLNTYs are already known. We present the imaging and pathologic findings of such a tumor as well as the surgical approach and clinical management.




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The Lateral Ventricles: A Detailed Review of Anatomy, Development, and Anatomic Variations [review-article]

SUMMARY:

The cerebral ventricles have been studied since the fourth century BC and were originally thought to harbor the soul and higher executive functions. During the infancy of neuroradiology, alterations to the ventricular shape and position on pneumoencephalography and ventriculography were signs of mass effect or volume loss. However, in the current era of high-resolution cross-sectional imaging, variation in ventricular anatomy is more easily detectable and its clinical significance is still being investigated. Interpreting radiologists must be aware of anatomic variations of the ventricular system to prevent mistaking normal variants for pathology. We will review of the anatomy and development of the lateral ventricles and discuss several ventricular variations.




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Novel Coronavirus: What Neuroradiologists as Citizens of the World Need to Know [EDITORIALS]




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Authorship Trends in the American Journal of Neuroradiology [LETTERS]




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Do the Magic Angle Effects or Susceptibility Effects Affect the Visualization of Nigrosome 1? [LETTERS]




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American Journal of Neuroradiology




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Bán shop office, kiot chân khối đế mặt đường Hàm Nghi, Vinhomes Gardenia. LH 0983786378

Bán shop office Vinhomes Gardenia, bán shop chân khối đế mặt Hàm Nghi 3 tòa chung cư A1, A2, A3 Vinhomes Gardenia Mỹ Đình, Nam từ Liêm. Bán kiot mặt Hàm nghi Gardenia. 1. Shop Diện tích 112.8 m2. Đang cho thuê 100 triệu/th, hợp đồng thuê còn 5 năm, thanh toán 12 tháng/ lần....




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Officially open for sale - Soleil Anh Duong Danang - Hotline: 0935 38 48 27

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DO YOU WANT TO OWN AN APARTMENT IN THE HEART OF QUY NHON CITY? - Unique and prime location, at 1 Nguyen Tat Thanh, the arterial road of Quy Nhon city, 4 facades 3 frontal face sea. - The project belongs to the segment of luxury apartments, 5-star utilities, strategic location in ...




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5 kinh nghiệm vàng khi chọn mua sofa mới

Hàng ngày chúng ta vẫn thường thư giãn, đọc sách, ăn uống, xem tivi, tán gẫu cùng gia đình và bạn bè hay thậm chí ngủ trên sofa trong phòng khách. Vì thế, không quá lời khi nói rằng, chọn mua sofa mới là một trong những công việc cực kỳ quan trọng mà chúng ta cần thực hiện khi trang hoàng tổ ấm thân yêu của mình.




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House for sale at 651 Minh Khai, Lac Trung, 55m2x 4 floors, suitable for office, wide entrance

House for sale in lane 651 Minh Khai, Vinh Tuy, Hai Ba Trung, near Times City - The most beautiful alley in Hai Ba Trung district, asphalt 2 cars avoid each other comfortably. Because of the need to convert, my family needed to sell a house on the alley 651 Minh Khai, 55m2, 4 flo...




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Selling hotel in busy business area of District 10, Ho Chi Minh City

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For Sale The Building Of Serviced Apartment - Phu My-Van Phat Hung- Dist 7- 297 sqm- 35 Billion

FOR SALE THE BUILDING OF SERVICED APARTMENT IN PHU MY RESIDENTIAL AREA- VAN PHAT HUNG- DISTRICT 7 -Location: is right at the corner, opposite the green Park in Phu My hung, it has just been planned synchronization. -Land area: 9x33 m -Usable area: 600 sqm, an elevator, spacious p...




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Chuyên cho thuê căn hộ 1,2,3 PN; officetel & shophouse The Sun Avenue, giá tốt nhất. LH 0908756869

Liên hệ ngay 0908756869 Mr. Nhật để tìm được căn hộ The Sun Avenue giá tốt nhất! Officetel: 7.5 - 10 triệu/tháng, diện tích từ 30 - 50m2. Căn hộ: Giá thuê tùy vào nội thất. - Căn 1 phòng ngủ, diện tích 53m2: + Nội thất cơ bản: 9 triệu/tháng (Bao gồm rèm, bếp và máy lạnh. + Full n...




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Room for rent in the heart of HCMC

Location: Backpacker area- Bui Vien walking street Facilities: Queen bed, private toilet and bathroom, private kitchen and washing machine, ... Other facilities: Elevator, rooftop sitting area, living room. Price: 7 million VND/month. Electricity: 4.000 vnd/kw. water: 200.000 vnd...




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Room with fully furnished and clean for rent, suitable for short/long term, office-159/9 Bach Dang

Studio room http://www.mkhome.vn at 159/9 Bach Dang Street, Ward 2, Tan Binh District is cool, full of light. 3 minutes from the airport by motorbike The house is kept clean. Quiet space, suitable for IT staff, foreign teachers, flight attendants, pilots, long-term business trav...




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River view apartment, located right in the heart of Saigon, Suitable for foreigners - Picity Hight

PiCity High Park Thanh Xuan - District 12 - Apartments worth living.- Price from only 1.5 billion / unit too attractive to invest or settle down.- The golden position is only 20 minutes from Tan Son Nhat airport.- Separate pink book, MB Bank loan support 70% for 20 years.- 4 star...




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SMARTEL 2 IN 1 PROJECTS JAMONA HEIGHTS OF TTC LANDS, TT IN 18 MONTHS

Smart investment opportunities.- Buy 1 get 2 with TTC Land's Smartel Jamona Heights.- While doing company offices - just living.- Diverse area of 30m2 - 79m2.- OCB bank borrows 50%.- Payment in 18 months.- 650 million can still invest in real estate in the center.- 50-year sales ...




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Mini apartment with an area of 30m2, 1.2 billion price, 5 star facilities, riverside habitat-Jamona

Smart 1-to-2 investment opportunity with TTC Land's Smartel Jamona Heights.Just working at the office of the company - just staying.Diverse area of 30m2 - 79m2.OCB bank borrows 50%.Payment in 18 months.There are 650 million still can invest in real estate in the center.50 year sa...




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The Marq By Hongkong Land - your landmark of pride - 1% monthly payment - Hotline: +84911130135

THE MARQ from HongKong Land - the 7th in luxury collection where is located in District 1, HCMC."The Marq" we called you are is the best in town!Exploring the must have - contact me for further information via mobile: +84911 130 135 or email: Click to reveal email Ladu...@xxxxxx....




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Where will be another version of "Pudong" at HCMC? Let me support you to explore !!! +84911 130 135

The Metropole - A new masterpiece coming from New financial center of HCMC - Thu Thiem New Urban Developer: Sonkim Land & Quoc Loc Phat Location: Functional Area 1, Thu Thiem new urban, District 2 Project key features: - Prime location in Thu Thiem new urban. (Zone 1) - Opposite ...




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For Sale Toploft Starhill In Phu My Hung- Tan Phu Ward- District 7

FOR SALE TOPLOFT STARHILL IN PHU MY HUNG- TAN PHU WARD- DISTRICT 7 - Area : 235 sqm - Including 4 bedrooms, a nice furniture - Having a parking lot, the door of direction is the West. - Balcony is in the direction of East-south, the North, The South view - The Sale price : contac...




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SwanBay Le Centre has 2 types of shophouses: PARC VILLA S and PARC VILLA R (garden and sky)

NJOY PEACEFUL LIVING SPACE AND PROMOTION OFF 7% AT THE SAME TIME The limited edition of Parc Villa S, with an exquisite design to harmonize the commercial and living value, offering exclusive privileges (*) from international real estate developer SwanCity : * Hot promotion 7% * ...




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Townhouse with 2 frontages, Corner intersection; Great for Business & Offices

+ Townhouse for lease with Two Fronts, corner intersection, 30m from Au Co St., 6m wide road, convenient traffic cars. + Crowded residential area, surrounded by many offices, schools, apartments, mini supermarkets, cafes ... + An awesome deal for trading in pharmacies, cafes, min...




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Supply of affordable houses remains low in HCMC

In the third quarter (Q3) of this year, Ho Chi Minh City (HCMC) saw no new supply of affordable housing entering the market. Low profit margin has made this segment unattractive to housing developers.




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The expansion of coworking spaces in HCMC’s central districts

The low supply of traditional office space expanding in central districts of Ho Chi Minh City (HCMC) has lead to the growth of coworking spaces, or flexible office spaces there.




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Which type of real estate is attracting Hanoi investors?

According to Batdongsan.com.vn’s real estate market report for the third quarter (Q3) of 2019, besides the attraction of traditional markets, resort real estate segment is witnessing the rise of emerging markets. Notably, Hanoi investors overwhelmed in term of the number of searches for resort real estate on the website.




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6th PropertyGuru Vietnam Property Awards kicks off latest edition, opens call for nominations in 2020

Competition ushers in new era to recognise the country’s standout real estate projects and senior leaders.




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Urban buildings: the cause of pollution and the ultimate solution

By 2060, we will have approximately two trillion square feet of buildings across the globe.




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Green buildings are crucial to addressing climate change, but why aren’t we seeing more of them?

We spoke with industry experts to identify what’s preventing developers from fully going green – and it all boils down to lack of finances.




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Winners of Vietnam Property Awards help ease the nation’s woes in the throes of the pandemic

Bearing in mind that maintaining a united front against the virus can bode well for the country.




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Thailand Property Award-winning developers pay it forward in the midst of the pandemic

Hearing the kingdom’s cry for help, these developers are offering their resources to everyone in need.




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Townhouses in My Hung for rent -158 sqm- Rental price of 60 million/Month, nice House

Townhouse My Hung In Phu My Hung For Rent - Area : 10,5m x15m - The house has air-conditioner, elevator, private motorbike parking - A nice house - Location: on Nguyen Cao Street, Tan Phong Ward, District 7 - Near SSIS, Crescent Mall, near many banks, supermarkets, and so on. - R...




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Rental of Corner Town House Of Him Lam Area- Tan Hung Ward- Dist 7- 237,5 sqm- $9000/Month

LEASING CORNER TOWNHOUSE OF HIM LAM AREA - TAN HUNG WARD - DISTRICT 7 - Area : 237,5 sqm - The rental price: $9000/Month equivalent to VND 207,000,000/Month Please contact us via 0907894503 Hoa Le Green House for seeing the house 24/7 and updating the best price https://greenhous...




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Townhouse For Rent In The Center Of Saigon- Vo Van Tan Street- District 3- 90 sqm- $4500/Month

Townhouse For Rent In The Center Of Saigon- Vo Van Tan Street- District 3 - Location: is the intersection of Cao Thang Street, busy business - Area : 5m * 18m - Structure : 4 to 5 floors, including 9 rooms - The rental price : $4500/Month (excluding VAT) equivalent to VND 103,500...




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Rental of Diamond Spa Town House in Hung Gia - Tan Phong Ward- District 7- 203.5 sqm- $8000/Month

Leasing Diamond Spa Town House In 4 Hung Gia PMH - Area: 11x18.5 m - Location: Large main street between Phan Khiem Ich Street and Bui Bang Doan Street - 100% of new furniture - Need to transfer all furniture and massage machine - The house has an elevator, a basement, a ground ...




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VI-Office chính chủ cho thuê văn phòng Quận 1. Ngay giao lộ Trần Hưng Đạo - Hồ Hảo Hớn

Vi - Office văn phòng cho thuê chính chủ 0948 790 022. ------------------------------------------------ Văn phòng cho thuê Quận 1 - 120m2/46 triệu. Phù hợp công ty quy mô 20 - 40 người. - Có thể chia nhỏ tùy nhu cầu của Khách Hàng. * Giá thương lượng thêm với khách hàng thiện chí...




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Vi-Office văn phòng chính chủ tại Bình Thạnh đường D2. DT 30-50 - 80 - 100 - 150 - 200m2... 1200m2

Vi - Office văn phòng cho thuê chính chủ - 0948 790 022. -------------------------------------------------- Văn phòng cho thuê Quận Bình Thạnh. Đường Nguyễn Gia Trí (D2 cũ). Hẻm ô tô lưu thông 2 chiều. Cách đường chỉ 20m. Đa dạng diện tích: 30 - 50 - 80 - 100 - 150 - 200m2... 1.2...




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Office space for lease in Hung Gia - Hung Phuoc, Phu My Hung, District 7. 17 million. 0911374499

Office space for lease in Hung Gia - Hung Phuoc, center of Phu My Hung, District 7 - Area: 6 x 18.5m - Located in center of PHM, for convenient transportation - Close to financial center, Crescent Mall, Paragon, Lotte Mart, convenient transportation, close to RMIT university ….M...




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Office spaces for lease in Hung Gia - Hung Phuoc, Phu My Hung, District 7

Office spaces for lease in Hung Gia - Hung Phuoc, Phu My Hung, District 7. - On mezzanine, total area 130m2, 30 million VND/month. Airy, spacious space. - On ground floor, area 80m2, 18 million VND/month - Offices on floor 1, 2, 3, area 80m2, 16 million VND/month - Office on mez...




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Offices for lease in Hung Gia, Hung Phuoc, Phu My Hung, District 7, HCM

Offices for lease in Hung Gia, Hung Phuoc, Phu My Hung, District 7, HCM - Area: 18m2, 7 million VND/month. Large enough for 3-4 people. - Area: 30 m2, 9 million VND/month - Offices on mezzanine: area 40 - 45m2, 9 million VND/month, private entrance. - Office on ground floor: area...




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Pearl Plaza office for lease in Binh Thanh Dist. Hotline 0908078995

Pearl Plaza grade A office located in the prime center of Ho Chi Minh City Great transportation It takes only 5 minutes to Center of Dist. 1, HCMC.Pearl Plaza office availabilities: 100-200-300-500-1000m2Monthly rent from: 20$++/m2/month, Only from 466,000vnd++/m2/ monthCentral ...




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High-end serviced offices for lease in Hoan Kiem dist., near Hanoi Opera House - 0901228090

Azumi Serviced Offices is a company specializing in leasing model of a virtual office and serviced offices.Address: No. 04 Pham Ngu Lao, Trang Tien Ward, Hoan Kiem District, HanoiComing to Azumi Serviced Offices, customers will be inspired by professional working space.The soluti...




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Renting office with resident for company and co-working space

The complex is designed as apartments for rent or use as Officetel to companies for office and resident experts. Built in 2017, the floor area is 1600 m2 consists of 15 apartments, 2 rooms for co-working, 01 garages for motorcycles and automobiles, area of 120 m2 with garden and ...




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Office for rent in Phu My Hung, District 7, only 400 USD/month

Office for rent in Phu My Hung, District 7, only 400 USD/month, many sizes: 20m2, 30m2,...100m2 Contact: 0907.18.3333...




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Office for rent in district 7, 35m2, 400usd/month

Office for rent in district 7, 35m2, 400USD/month, officetel for rent in district 7, suitable for office or for living gym, swimming pool..... call: 0907 183 333...




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Leasing townhouse with 2 frontages, 1 ground floor, 2 floors, near crossroads; suitable for office

+ townhouse with 2 frontages, 1 ground floor, 2 floors, near crossroads; convenient traffic and parking + Crowded residential area, surrounded by many offices, schools, apartments, mini supermarkets, cafes ... + Convenient for trading in cafes, mini supermarkets, transaction offi...