| Nonenhanced free-breathing ECG-gated steady-state free precession 3D MR angiography of the renal arteries: comparison between 1.5 T and 3 T. | |
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MedLine Citation:
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PMID: 20173162 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: The purpose of our study was to compare the image quality of free-breathing ECG-gated nonenhanced steady-state free precession (SSFP) MR angiography of renal arteries at 1.5 T and 3 T. SUBJECTS AND METHODS: Twenty volunteers (11 men, nine women; mean age, 23.2 +/- 2.3 years) without a history of renovascular disease participated in the study. Nonenhanced SSFP MR angiography was performed on all subjects at both 1.5 T and 3 T with a maximum interval of 2 weeks between the imaging sessions. The subjective image quality of axial and coronal maximum-intensity-projection reconstructions of four segments (1, abdominal aorta and ostium of renal artery; 2, main renal artery; 3, segmental branches outside renal parenchyma; 4, segmental branches inside renal parenchyma) was evaluated independently by two radiologists using a 4-point scale (4, excellent; 1, nondiagnostic). Relative signal-to-noise ratio, contrast-to-noise ratio, and maximum visible vessel length of the right and left renal arteries also were determined. RESULTS: No significant difference in image quality at 1.5 T and 3 T was found for segments 1 and 2. The mean image quality for segments 3 and 4 was significantly greater at 3 T (3.88 +/- 0.32, 3.17 +/- 0.70) than at 1.5 T (3.32 +/- 0.73, 2.09 +/- 0.81) (p < 0.001). At 3 T, the maximal vessel length of the right (9.85 +/- 0.82 cm) and left (8.3 +/- 0.79 cm) renal arteries was significantly greater than at 1.5 T (8.94 +/- 1.38 cm and 7.58 +/- 1.18 cm, respectively). CONCLUSION: Performing nonenhanced SSFP MR angiography at 3 T significantly improves visualization of peripheral renal arterial segments in healthy subjects as compared to 1.5 T. |
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Authors:
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Rotem Shlomo Lanzman; Patric Kr?pil; Peter Schmitt; Sonja-Marie Freitag; Adrian Ringelstein; Hans J?rg Wittsack; Dirk Blondin |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: AJR. American journal of roentgenology Volume: 194 ISSN: 1546-3141 ISO Abbreviation: AJR Am J Roentgenol Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-22 Completed Date: 2010-03-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7708173 Medline TA: AJR Am J Roentgenol Country: United States |
Other Details:
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Languages: eng Pagination: 794-8 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, University Hospital D?sseldorf, Moorenstrasse 5, 40225 D?sseldorf, Germany. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Electrocardiography Humans Imaging, Three-Dimensional* Magnetic Resonance Angiography / methods* Male Renal Artery / anatomy & histology* Statistics, Nonparametric Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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