Indications for MRV Brain Scan - mrimaster
Two-dimensional (2D) time-of-flight (TOF) MR venography (MRV) and three-dimensional (3D) phase-contrast (PC) are the techniques commonly used to assess the cerebral venous sinuses because they are easy to perform and do not require contrast administration.
Intra- and Extracranial MR Venography: Technical Notes, …
3.2. Extracranial 2D TOF MRV. TOF MR angiography is based on the principle that blood flowing into an imaging section has higher signal intensity than the stationary tissue within that section, which is partially saturated.
Radiopaedia.org, the peer-reviewed collaborative radiology …
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Cerebral MR venography - Clinical Imaging
Current methods of MR venography (MRV) include two- and three-dimensional time-of-flight (TOF) and phase-contrast (PC) sequences with or without intravenous contrast injection, and three-dimensional contrast-enhanced short TE gradient–echo venography.
Cerebral Venous Thrombosis: Diagnostic Accuracy of Combined, …
2010年3月1日 · We evaluated the accuracy of a combined, dynamic (1.5 seconds per dataset) and static (voxel size, 1.1 × 0.9 × 1.5 mm), contrast-enhanced MRV method (combo-4D MRV) relative to other established MR/MRV modalities.
Cerebral MR Venography: Normal Anatomy and Potential …
2000年1月1日 · Our study has shown that when using 2D-TOF MR venography, flow gaps in nondominant transverse sinuses can be observed in up to 31% of patients with normal MR imaging findings, and that such flow gaps should therefore be judged with caution when the diagnosis of dural sinus thrombosis is in question.
Current imaging modalities for diagnosing cerebral vein …
2020年5月1日 · Non-contrast-enhanced TOF MRV and PC MRV had a sensitivity of 64–100% and 48–100%, respectively, although with wide 95% confidence intervals. Moreover, non-contrast-enhanced flow related MRI was confirmed to be less accurate for identifying cortical vein thrombosis [21, 64].
Basic Principles of Time‐of‐Flight Magnetic Resonance Angiography (TOF ...
2013年11月30日 · Time-of-Flight (TOF) is the most widely used non-contrast enhancement magnetic resonance angiography (MRA) technique. TOF is based on the effect of unsaturated spins inflowing into a region of saturated stationary spins
Cerebral MR venography - ScienceDirect
2004年3月1日 · Current methods of MR venography (MRV) include two- and three-dimensional time-of-flight (TOF) and phase-contrast (PC) sequences with or without intravenous contrast injection, and three-dimensional contrast-enhanced short TE gradient–echo venography.
Cerebral venous thrombosis: state of the art diagnosis and …
2018年5月11日 · MRV may be performed without contrast using TOF technique or phase contrast technique or with contrast-enhanced technique. MRV with gadolinium allows for a direct assessment of luminal filling similar to that of CTV, with comparable sensitivity and specificity.