Paetzel, Christian and Zorger, Niels and Voelk, M. and Herold, T. and Seitz, Johannes and Nitz, Wolfgang R. and Feuerbach, Stefan and Hamer, Okka W. and Lenhart, Markus (2005) Intra-arterial magnetic resonance angiography of the iliac arteries: Clinical experience using two different protocols. ACTA RADIOLOGICA, 46 (3). pp. 250-255. ISSN 0284-1851, 1600-0455
Full text not available from this repository. (Request a copy)Abstract
Purpose: To assess the feasibility of intra- arterial magnetic resonance angiography ( iaMRA) with two different protocols. Material and Methods: Twenty patients were prospectively examined after digital subtraction angiography. Contrast- enhanced iaMRA was performed using a 1.5T magnetic resonance imaging ( MRI) system. Contrast agent ( gadodiamide) was injected through a conventional angiography catheter placed in the abdominal aorta. The patients were randomized into two groups each comprising 10 patients. Group 1 was examined with a FLASH- 3D ( fast low- angle shot) sequence, allowing the center of the k-space to be acquired 0.5 s after initiation of the measurement. Group 2 was examined with the identical sequence, but the center of the k- space was acquired after 8.7 s. The increase in the intravascular signal intensity was determined and the diagnostic value of the angiograms was independently scored by 4 investigators using a 5- point scale. Results: Nineteen of 20 MRAs were scored as diagnostic; only 1 was scored as nondiagnostic by 2 observers. The diagnostic value of the angiograms of group 2 was judged superior to that of group 1 owing to a more homogeneous intravascular contrast distribution. Conclusion: Intra- arterial MRA is feasible. The diagnostic value of angiograms using a flash sequence with center of the k- space acquisition after 8.7 s ranged from good to excellent. This sequence is appropriate for iaMRA of iliac arteries to support MR guided intervention.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENHANCED MR-ANGIOGRAPHY; CONTRAST AGENT; RENAL-INSUFFICIENCY; FEASIBILITY; GADODIAMIDE; STENOSES; adults; angiography; magnetic resonance angiography (MRA); magnetic resonance imaging (MRI); pelvis; vascular |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Röntgendiagnostik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 May 2021 05:03 |
| Last Modified: | 14 May 2021 05:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36142 |
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