Document Detail


Infragenual cuff-compression reduces venous contamination in contrast-enhanced MR angiography of the calf.
MedLine Citation:
PMID:  15269965     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: To reduce venous contamination at the calf level in three-dimensional contrast-enhanced MR angiography (CE-MRA) by applying continuous infragenual cuff-compression. MATERIALS AND METHODS: Ten patients with clinically relevant peripheral arterial occlusive disease (PAOD) underwent dynamic three-dimensional CE-MRA of the calf. Six consecutive measurements were acquired with the first measurement serving as mask. Cuff-compression of 50 mmHg was attached below the knee. To allow intra-individual comparison, compression was applied unilaterally. The cuff was inflated three minutes before scanning and was continued throughout the MRA session. Venous contamination and arterial visualization scores were ranked using a five-point rating scale. Contrast-to-noise ratios (CNRs) of superficial enhancing calf-veins on the uncompressed and compressed calf sides were evaluated. An asymmetry index (AI) defined by CNR(mean) (uncompressed)/CNR(mean) (compressed) was introduced to describe the ratio in venous contrast agent supply between both sides quantitatively. RESULTS: Three-dimensional CE-MRA of the calves demonstrated significantly lower superficial venous contamination scores (P < 0.004) and clearly improved arterial visualization (P < 0.009) on the compressed side. Additionally, AI values were larger than 1 (P < 0.02), indicating a higher contrast agent supply in the superficial veins on the uncompressed side. CONCLUSION: Infragenual cuff-compression minimizes venous overlay in three-dimensional CE-MRA at calf level by reduction of contrast agent supply in the superficial veins.
Authors:
Deniz Bilecen; Anja-Carina Schulte; Georg Bongartz; Hanns-Georg Heidecker; Markus Aschwanden; Kurt A Jäger
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of magnetic resonance imaging : JMRI     Volume:  20     ISSN:  1053-1807     ISO Abbreviation:  J Magn Reson Imaging     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-07-22     Completed Date:  2004-11-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  347-51     Citation Subset:  IM    
Copyright Information:
Copyright 2004 Wiley-Liss, Inc.
Affiliation:
Department of Diagnostic Radiology, University of Basel, Petersgraben 4, CH-4031 Basel, Switzerland. dbilecen@uhbs.ch
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MeSH Terms
Descriptor/Qualifier:
Aged
Arterial Occlusive Diseases / diagnosis*
Contrast Media
Female
Humans
Image Processing, Computer-Assisted / methods*
Imaging, Three-Dimensional
Magnetic Resonance Angiography / instrumentation,  methods*
Male
Middle Aged
Popliteal Artery*
Chemical
Reg. No./Substance:
0/Contrast Media

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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