contrast-enhanced MR angiography
Dynamic Contrast Enhanced MR Angiography and MR Imaging of the Carotid Artery: High Resolution Sequences in Different Acquisition Planes
... first-pass MR angiography should have high differentiation between the con- trast-filled vascular lumen and the surrounding structures in order to show the ...of contrast material during acquisition, ...
5
First Pass Contrast Enhanced MR Angiography in Evaluation of Treated Spinal Arteriovenous Fistulas: Is Catheter Angiography Necessary?
... dinated contrast agent (Omnipaque 300; GE Healthcare) was se- lectively injected bilaterally into segmental arteries at the level of the treated fistula and also at least 2 vertebral levels above and below the ...
6
Intracranial Aneurysms Treated with Guglielmi Detachable Coils: Usefulness of 6 Month Imaging Follow Up with Contrast Enhanced MR Angiography
... months) angiography for the follow-up of intracranial coiled ...6-month MR angiog- raphy and 12-month DSA may be explained by the short delay between examinations in our series, whereas Raymond et al (19) ...
7
Assessment of Craniospinal Arteriovenous Malformations at 3T with Highly Temporally and Highly Spatially Resolved Contrast Enhanced MR Angiography
... CCA (Integris V, Philips Medical Systems, Best, the Netherlands) im- ages were acquired with multiple superselective manual injections (a total of 100 –170 mL) of contrast (Omnipaque 300; GE-Amersham Healthcare, ...
8
Contrast enhanced MR Angiography of Supraaortic Vessels: The Effect of Voxel Size on Image Quality
... assessment, MR angiograms were reviewed in a blinded fashion by two independent examiners ...reviewed MR images in a fully randomized ...the enhanced arterial lumen (S) divided by the standard ...
7
Preoperative Evaluation of Carotid Artery Stenosis: Comparison of Contrast Enhanced MR Angiography and Duplex Sonography with Digital Subtraction Angiography
... No neurologic events occurred in the 39 patients during or after any of the performed imaging proce- dures. Seventy-one of 78 carotid bifurcations were examined adequately with all three modalities. Seven carotid ...
6
Follow Up of Coiled Cerebral Aneurysms at 3T: Comparison of 3D Time of Flight MR Angiography and Contrast Enhanced MR Angiography
... gadolinium contrast agents does have certain potential disadvantages compared with unen- hanced sequences (eg, cost, increased patient discomfort, complications of intravenous injections, and rare compli- cations ...
7
Depiction of the Superior Petrosal Vein Complex by 3D Contrast Enhanced MR Angiography
... tionally, very small anastomoses (not visible in our study) can probably further increase the flow through alternative pathways. It remains unclear how large the diameters of the visible anasto- moses have to be in ...
7
Spinal Cord Vascular Disease: Characterization with Fast Three Dimensional Contrast Enhanced MR Angiography
... 1.5-T MR unit equipped with an ultrafast three-axis gradient system (maxi- mum amplitude of 22 mT/m, rise time of 184 milliseconds, and slew rate of 120 mT/m per millisecond) using a standard spinal phased-array ...
9
Contrast Enhanced MR Angiography Is Not More Accurate Than Unenhanced 2D Time of Flight MR Angiography for Determining ≥70% Internal Carotid Artery Stenosis
... CE-MRA was performed on a 1.5T Signa or LX system (GE Medical Systems, Milwaukee, Wis). Images were obtained by using a neck phased array coil; acquisition was oriented in the coronal plane. Con- trast agent (Magnevist; ...
8
Value and Limitations of Contrast Enhanced MR Angiography in Spinal Arteriovenous Malformations and Dural Arteriovenous Fistulas
... conventional angiography included at least injection of the segmental arteries, on both sides, 1 level above and below the suggested ...spinal angiography was necessary with imaging of the cervical and ...
10
Quality Evaluation Scheme for Cerebral Time Resolved 3D Contrast Enhanced MR Angiography Techniques
... CCA. CCA was performed with a 4F catheter via a femoral artery approach (Advantx LCA/LCV ⫹ ; GE Healthcare, Milwaukee, Wis- consin) with a filming rate of 2–5 images per second. CCA included a selective injection of the ...
8
Characterization of Aneurysm Remnants after Endovascular Treatment: Contrast Enhanced MR Angiography versus Catheter Digital Subtraction Angiography
... catheter angiography, an invasive procedure with associated ...compare contrast-enhanced MR angiography (CE-MRA) with digital subtraction angiography (DSA) for depiction of ...
5
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 ...
8
Time Resolved Contrast Enhanced MR Angiography of Spinal Vascular Malformations
... Of 50 patients (age range, 5– 83 years; median, 61 years; 24 fe- males, 26 males), 46 had both TRICKS-MRA and DSA available for comparison and 4 were managed on the basis of TRICKS findings with additional CTA findings ...
6
Evaluation of Dural Arteriovenous Fistulas with 4D Contrast Enhanced MR Angiography at 3T
... digital subtraction angiography (DSA) remains the criterion standard for the assessment of intracranial DAVF. Its inherent high spatial and temporal resolution facilitates the accurate analysis of the fistula site ...
6
Aneurysms of the Anterior Communicating Artery Treated with Guglielmi Detachable Coils: Follow Up with Contrast Enhanced MR Angiography
... on contrast-enhanced MRA images compared with those on TOF-MRA images, and this difference is probably due to the shorter TE that decreases mag- netic susceptibility artifacts (10, ...
7
Prospective Evaluation of Carotid Artery Stenosis: Elliptic Centric Contrast Enhanced MR Angiography and Spiral CT Angiography Compared with Digital Subtraction Angiography
... These images were obtained with a HiSpeed Advantage CT scanner (GE Medical Systems) with a detector configuration of 816 channels and 972 views. Patients were instructed to breathe quietly without swallowing during the ...
8
Contrast enhanced MR Angiography of Intracranial Giant Aneurysms
... Brugie`res et al (6) proposed a method of distin- guishing subacute clot from flow signal by repeat- ing the 3D-TOF sequence with a proximal presat- uration pulse over the cervical arteries. Subsequent comparison of ...
8
Contrast Enhanced MR Angiography of the Carotid and Vertebrobasilar Circulations
... CT angiography (CTA) can be used as an alternative technique to assess the neck vessels, though it uses ionizing radiation and poten- tially nephrotoxic contrast agent (39 – ...
7