| Renal arteries: isotropic, high-spatial-resolution, unenhanced MR angiography with three-dimensional radial phase contrast. | |
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MedLine Citation:
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PMID: 20980449 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To prospectively compare a new three-dimensional (3D) radial phase-contrast magnetic resonance (MR) angiographic method with contrast material-enhanced MR angiography for anatomic assessment of the renal arteries. MATERIALS AND METHODS: An institutional review board approved this prospective HIPAA-compliant study. Informed consent was obtained. Twenty-seven subjects (mean age, 52.6 years ± 20.5 [standard deviation]) were imaged with respiratory-gated phase-contrast vastly undersampled isotropic projection reconstruction (VIPR) prior to contrast-enhanced MR angiographic acquisition with a 3.0-T clinical system. The imaging duration for phase-contrast VIPR was 10 minutes and provided magnitude and complex difference ("angiographic") images with 3D volumetric (320 mm) coverage and isotropic high spatial resolution (1.25 mm(3)). Quantitative analysis consisted of comparing vessel diameters between the two techniques. Qualitative assessment included evaluation of the phase-contrast VIPR and contrast-enhanced MR angiographic techniques for artifacts, noise, and image quality. Bland-Altman analysis was used for comparison of quantitative measurements, and the Wilcoxon signed rank test was used for comparison of qualitative scores. RESULTS: Phase-contrast VIPR images were successfully acquired in all subjects. The vessel diameters measured with phase-contrast VIPR were slightly greater than those measured with contrast-enhanced MR angiography (mean bias = 0.09 mm). Differences in mean artifact, quality scores for the proximal renal arteries, and overall image quality scores between phase-contrast VIPR and contrast-enhanced MR angiographic techniques were not statistically significant (P = .31 and .29, .27 and .39, and .43 and .69 for readers 1 and 2, respectively). The quality scores for the segmental renal arteries were higher for phase-contrast VIPR than for contrast-enhanced MR angiography (P < .05). Although the noise scores were higher with phase-contrast VIPR than with contrast-enhanced MR angiography and were statistically significant (P < .05), the presence of noise did not interfere with the ability to interpret the images. CONCLUSION: Isotropic, high-spatial-resolution, unenhanced MR angiography of the renal arteries is feasible with 3D radial undersampling. |
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Authors:
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Christopher J François; Darren P Lum; Kevin M Johnson; Benjamin R Landgraf; Thorsten A Bley; Scott B Reeder; Mark L Schiebler; Thomas M Grist; Oliver Wieben |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural Date: 2010-10-27 |
Journal Detail:
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Title: Radiology Volume: 258 ISSN: 1527-1315 ISO Abbreviation: Radiology Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2010-12-24 Completed Date: 2011-02-01 Revised Date: 2012-01-02 |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: United States |
Other Details:
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Languages: eng Pagination: 254-60 Citation Subset: AIM; IM |
Copyright Information:
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© RSNA, 2010 |
Affiliation:
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Department of Radiology, Cardiothoracic and MRI Divisions, University of Wisconsin, 600 Highland Ave, Madison, WI 53792-3252, USA. CFrancois@uwhealth.org |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Angiography, Digital Subtraction Artifacts Contrast Media / diagnostic use Feasibility Studies Female Humans Image Interpretation, Computer-Assisted Imaging, Three-Dimensional* Magnetic Resonance Angiography / methods* Male Middle Aged Prospective Studies Renal Artery Obstruction / diagnosis* Statistics, Nonparametric Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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2R01HL072260/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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