| MDCT angiography assessment of renal artery in-stent restenosis: Can we reduce the radiation exposure burden? A feasibility study. | |
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MedLine Citation:
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PMID: 20418036 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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AIM: We explored the feasibility of renal artery multidetector computed tomography (MDCT) and detection of in-stent restenosis at low exposure settings. PATIENTS/METHODS: Sixteen patients with 19 renal artery stents underwent CT angiography. A biphasic protocol was performed including arteriographic acquisition at standard 120kVp and a late-arterial scan at 100kVp (n=9) or 80kVp (n=7). Images were reconstructed under various algorithms. Signal-to-noise and contrast-to-noise ratios (SNR, CNR) were determined within stent, aorta and renal arteries. Image quality and the presence of restenosis were assessed. Volume CT dose-index was recorded and dose reduction (DR%) between phases was calculated. RESULTS: Ten patients presented with Hounsfield values >250HU in all segments, phases and reconstructions and were further evaluated. The 120kVp protocol performed better in all vessels and reconstruction algorithms. SNR at 120kVp (B31f) did not differ significantly compared to 100kVp (B31f). CNR within stent was borderline compromised at 100kVp (p=0.042). All but two image sets (at 80kVp) were considered diagnostic. Minor loss of subjective image quality was noticed at 100kVp. No difference in assessment of restenosis was observed between 120kVp and the diagnostic low-exposure scans. Mean DR% was estimated 45% at 100kVp and 77% at 80kVp. CONCLUSIONS: Renal MDCT angiography and stent-restenosis assessment are feasible at 100kVp with minor loss of image quality and almost half radiation exposure. |
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Authors:
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Eirini Manousaki; Kostas Perisinakis; Apostolos Karantanas; Dimitrios Tsetis |
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Publication Detail:
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Type: Journal Article Date: 2010-04-24 |
Journal Detail:
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Title: European journal of radiology Volume: 79 ISSN: 1872-7727 ISO Abbreviation: Eur J Radiol Publication Date: 2011 Aug |
Date Detail:
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Created Date: 2011-08-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8106411 Medline TA: Eur J Radiol Country: Ireland |
Other Details:
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Languages: eng Pagination: 224-31 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Radiology, Faculty of Medicine, University of Crete, Greece. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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