Bolus-chasing contrast-enhanced 3D MRA of the lower extremity: Comparison with intraarterial DSA
In: Acta radiologica (1987), Jg. 44 (2003), Heft 2, S. 185-192
academicJournal
- print, 25 ref
Zugriff:
Purpose: To evaluate step-table 3D contrast-enhanced (CE) MRA with bolus chasing for the detection and grading of stenoses in patients with peripheral vascular disease (PVD) of the lower extremities. Material and Methods: Fifty patients were studied by step-table bolus-chasing 3D-CE-MRA and i.a. DSA within 24 h. After determination of the individual circulation time, CE-MRA was performed during power injection of 40 ml of Gd-DTPA. To cover the whole range between the renal arteries and the feet with three slab locations, the scanner table was manually advanced twice for 350 mm. Total imaging time was 1 min 23 s. The degree of stenosis and image quality of the images were evaluated by 2 observers. In addition, a treatment plan was established based on the 3D-CE-MRA and DSA investigations. Results: In 44 of 50 patients (88%), the visualization of the arterial tree from the renal arteries to the foot was possible. Forty-six of 50 patients (92%) had good or very good image quality. In the calf, 3D-CE-MRA was superior to DSA in 6 patients. For the detection of stenosis >50%, sensitivity was 99.5%, specificity 98.8%, positive predictive value 95.6% and the negative predictive value 99.8%. Cohen's kappa for 3D-CE-MRA vs. DSA was 0.926; for interobserver agreement it was 0.96. Conclusion: Bolus-chasing 3D-CE-MRA with manual table movement is a simple, robust and easy to perform technique which provides high quality angiograms of the lower extremity arterial system and is comparable to, i.a., DSA for the diagnosis of PVD.
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Bolus-chasing contrast-enhanced 3D MRA of the lower extremity: Comparison with intraarterial DSA
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Autor/in / Beteiligte Person: | STEFFENS, J. C ; SCHÄFER, F. K. W ; OBERSCHEID, B ; LINK, J ; JAHNKE, T ; HELLER, M ; BROSSMANN, J |
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Zeitschrift: | Acta radiologica (1987), Jg. 44 (2003), Heft 2, S. 185-192 |
Veröffentlichung: | Basingstoke: Taylor & Francis, 2003 |
Medientyp: | academicJournal |
Umfang: | print, 25 ref |
ISSN: | 0284-1851 (print) |
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