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Comparison of silent MRA and time-of-flight MRA in the depiction and grading of brain arteriovenous malformations.
Quant Imaging Med Surg
December 2024
Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.
Background: Preliminary small-sample studies suggest that silent magnetic resonance angiography (MRA) has an advantage over time-of-flight MRA (TOF MRA) in the characterization of brain arteriovenous malformation (BAVM), but did not examine whether the imaging performance of silent MRA was affected by the intrinsic features of BAVM or common clinical factors. This study sought to compare silent MRA and TOF MRA in terms of the visualization and grading of BAVMs in various clinical settings.
Methods: In total, 85 participants (50 males, 35 females; mean age: 33.
Non-Contrast MRI Sequences for Ischemic Stroke: A Concise Overview for Clinical Radiologists.
Vasc Health Risk Manag
December 2024
Department of Neurology, Hasanuddin University, Makassar, Indonesia.
Ischemic stroke is the second leading cause of mortality and morbidity worldwide. Due to the urgency of implementing immediate therapy, acute stroke necessitates prompt diagnosis. The current gold standards for vascular imaging in stroke include computed tomography angiography (CTA), digital subtraction angiography (DSA) and magnetic resonance angiography (MRA).
View Article and Find Full Text PDFIdentification of the Distal Dural Ring Using Three-dimensional Motion-sensitized Driven-equilibrium Prepared T-weighted Fast Spin Echo Imaging: Application to Paraclinoid Aneurysms.
Magn Reson Med Sci
November 2024
Department of Radiology, Shiga University of Medical Science, Otsu, Shiga, Japan.
Purpose: This study investigated the ability of three-dimentional motion-sensitized driven-equilibrium prepared T-weighted fast spin echo (3D MSDE-FSE) imaging to identify distal dural rings (DDRs) and paraclinoid aneurysms (ParaC-ANs) and differentiate between intradural and extradural ParaC-ANs and compared it with that of established MR cisternography-based techniques.
Methods: 3D MSDE-FSE images were acquired along with fast imaging employing steady state acquisition (FIESTA), and time-of-flight magnetic resonance angiography (TOF-MRA) on a 3T MRI system in 53 patients with unruptured and untreated ParaC-ANs. Two radiologists applied a 3-point scale to rate the clarity with which the DDR (53 left and 53 right) and ParaC-ANs (total of 55) were depicted in the 3D MSDE-FSE and FIESTA images.
Quantitative modeling of lenticulostriate arteries on 7-T TOF-MRA for cerebral small vessel disease.
Eur Radiol Exp
November 2024
State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, 100101, Beijing, China.
Article Synopsis
- Researchers created a framework to segment and model lenticulostriate arteries using advanced MRI techniques, specifically targeting patients with CADASIL and comparing them to healthy controls.
- The framework involves a small-patch convolutional neural network for accurate segmentation, supported by a random forest model for further analysis, with performance evaluated against manual segmentation methods.
- Results showed that the framework achieved high accuracy in artery measurements, demonstrating better reliability than manual methods, suggesting it could be beneficial for diagnosing and studying CADASIL.
Comparison of the imaging performance of time-of-flight MRA and ultrashort echo time MRA in flow diverters: A phantom study.
Interv Neuroradiol
September 2024
Department of Radiology, Graduate School of Medicine, Juntendo University, Tokyo, Japan.
Objective: Flow diverters (FD) are innovative treatments for wide-neck intracranial aneurysms. After-treatment verification of embolization and parent vessel patency is crucial. While evaluation using time-of-flight magnetic resonance angiography (TOF-MRA) is useful, it suffers from signal loss within the FD due to susceptibility effects.
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