Time-resolved MR angiography (MRA)
Acceleration of ASL-based time-resolved MR angiography by acquisition of control and labeled images in the same shot (ACTRESS)
... acquisition time of the conventional sequence by acquir- ing the labeled and control images in a single Look-Locker readout ...acquisition time of a 4D-MRA sequence from approximately 7 to ...
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3D Time Resolved MR Angiography (MRA) of the Carotid Arteries with Time Resolved Imaging with Stochastic Trajectories: Comparison with 3D Contrast Enhanced Bolus Chase MRA and 3D Time Of Flight MRA
... Time-resolved MRA with the TWIST sequence and parallel imaging at 1.5T using a low-contrast dose provides sufficient temporal resolution to assess the anatomy and hemodynamics of the extracranial carotid ...
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Cranial Dural Arteriovenous Fistula: Diagnosis and Classification with Time Resolved MR Angiography at 3T
... T he diagnosis of a cranial dural arteriovenous fistula (DAVF) (also referred to as a dural arteriovenous shunt) has traditionally been made with catheter-based cerebral in- tra-arterial digital subtraction ...
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Comparison of Time Resolved and First Pass Contrast Enhanced MR Angiography in Pretherapeutic Evaluation of Spinal Dural Arteriovenous Fistulas
... whole-spine MR imaging was performed on a ...for MR imaging and MRA, such as patient instruction/education, stabilization in the scanner, and sedation if ...
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Postoperative Assessment of Extracranial–Intracranial Bypass by Time Resolved 3D Contrast Enhanced MR Angiography Using Parallel Imaging
... We obtained CE-MRA images from 17 consecutive patients referred to us for MR imaging following EC-IC bypass during a 2-year period. The subjects consisted of 7 men and 10 women aged 23–74 years (mean age, 51.2 ...
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Intracranial Time Resolved Contrast Enhanced MR Angiography at 3T
... may play a role. For example, mechanical thrombolysis is more technically feasible for large branch occlusions (M1: proximal middle cerebral artery) compared with smaller distal branch occlusions, whereas chemical ...
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MR Angiography of Dural Arteriovenous Fistulas: Diagnosis and Follow Up after Treatment Using a Time Resolved 3D Contrast Enhanced Technique
... MR and MRA images of all patients were assessed on a 3D postpro- cessing workstation (Syngo; Siemens Medical Solutions). Images were independently analyzed by 2 experienced neuroradiologists (M.M and D.S.M.R) who ...
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A Novel Collateral Imaging Method Derived from Time Resolved Dynamic Contrast Enhanced MR Angiography in Acute Ischemic Stroke: A Pilot Study
... We developed a Matlab-based program (MathWorks, Natick, Massachusetts) to produce an mMRA collateral map and an MRP collateral map (Fig 2). The sequential postprocessing steps are as follows: 1) opening and reading DICOM ...
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Application of Time Resolved 3D Digital Subtraction Angiography to Plan Cerebral Arteriovenous Malformation Radiosurgery
... multiple MR imaging series, in- cluding stereotactic TOF-MRA, T1-weighted MR imaging, T2- weighted MR imaging (Fig 3B, -C, and -D), and stereotactic 2D-DSA, the complexities of the hemodynamics of ...
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Assessment of Craniospinal Arteriovenous Malformations at 3T with Highly Temporally and Highly Spatially Resolved Contrast Enhanced MR Angiography
... within the diagnostic range (mean, 1.1 ⫾ 0.4). In the control group, 98% (651/660) of arterial segments were in the diag- nostic range (mean, 1.06 ⫾ 0.4). No significant difference was detected by using a nonpaired ...
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Improved Quality and Diagnostic Confidence Achieved by Use of Dose Reduced Gadolinium Blood Pool Agents for Time Resolved Intracranial MR Angiography
... The present study confirms the feasibility and qualitative superi- ority of the BPA gadofosveset disodium over the SCA gadobenate dimeglumine for use in time-resolved cerebral MRA. The findings suggest that ...
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Quality Evaluation Scheme for Cerebral Time Resolved 3D Contrast Enhanced MR Angiography Techniques
... TR-3D-CE-MRA by Using CENTRA Keyhole at 3T. MR imaging was performed on a 3T whole-body scanner (Achieva; Philips Health- care, Best, the Netherlands) with an 8-channel phased-array head coils. A 3D T1-weighted ...
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Time Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal Arteriovenous Shunts
... of time-resolved MRA techniques is the ability to provide in- creased confidence in fistula localization, which primarily re- lates to the ability to allow evaluation of flow in an anterograde fashion ...
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Time Resolved Contrast Enhanced MR Angiography of Spinal Vascular Malformations
... Selective intra-arterial spinal DSA was performed via a femoral approach in a dedicated biplanar neuroangiographic suite within 7 days of the MR imaging examination. Procedures were per- formed with the patient ...
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Evaluation of Collaterals and Clot Burden Using Time Resolved C Arm Conebeam CT Angiography in the Angiography Suite: A Feasibility Study
... CT, MR imaging, and transcranial ...C-arm time-re- solved conebeam CTA over 2D DSA is due to the following rea- sons: 1) the ability to provide a global (3D instead of 2D) view of collaterals with a single ...
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Time Resolved Contrast Enhanced Carotid MR Angiography Using Sensitivity Encoding (SENSE)
... acquisition time, the duration of intraarterial plateau concentration of contrast agent cannot be limited to one dynamic acquisition, but should be maintained at least over the duration of multiple dynamic ...
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Utility of CT Angiography and MR Angiography for the Follow up of Experimental Aneurysms Treated with Stents or Guglielmi Detachable Coils
... TOF MR angiograms, there is a considerable disadvantage of venous and ex- travascular enhancement (17, ...3D MR DSA re- duces spin saturation in regions of slow flow with- out venous overlap, and thus it ...
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Arachnoid granulations in the transverse and sigmoid sinuses: CT, MR, and MR angiographic appearance of a normal anatomic variation
... 200 MR studies obtained for possible acoustic neu- roma, three-dimensional imaging was per- formed, giving 2-mm adjacent sections through the sinuses, and 2 granulations were ...by MR imaging, so this also ...
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Intracranial vascular stenosis and occlusion: MR angiographic findings
... to MR angiographic scores and the col- umns represent conventional angiographic ...and MR angio- graphic ...and MR angiogra- phy as to the degree of stenosis was ...
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Assessment of Dural Arteriovenous Fistulas of the Cavernous Sinuses on 3D Dynamic MR Angiography
... There were some limitations in this study: The feeding ar- teries and entry points could not be demonstrated on 3D dy- namic MRA, and it was impossible to differentiate DAVFs of the cavernous sinuses from direct carotid ...
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