Document Detail

Three-dimensional MR angiography in imaging platinum alloy stents.
MedLine Citation:
PMID:  15558574     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate visualization inside platinum stents with three-dimensional contrast-enhanced magnetic resonance angiography (CE-MRA). MATERIALS AND METHODS: Breath-hold three-dimensional gadolinium (Gd) MRA was performed on 18 patients with 22 platinum stents in the renal (n = 18), celiac (n = 1), superior mesenteric (n = 1), and iliac (n = 2) arteries. Electronic calibers were used to measure the lumen diameter within the stent and just distal to the stent to calculate percent stenosis. MRA accuracy was determined from the difference between percent stenosis measured on MRA and digital subtracted angiography (DSA). The patients were imaged at flip angles of 45 degrees , 60 degrees , 75 degrees , 90 degrees , and 150 degrees . RESULTS: MRA demonstrated the stent lumen in all of the patients, with a mean difference between MRA and DSA of 21%. For stents oriented parallel to B0 (iliac arteries) the difference was only 10%, as compared to 22% for stents perpendicular to B0. The flip angle with the best agreement between MRA and DSA was 75 degrees (16%). CONCLUSION: The lumen of a platinum stent can be imaged with three-dimensional CE-MRA, although grading of restenosis has limited accuracy. The best results were obtained with a flip angle of 75 degrees and for stents in the iliac arteries parallel to B0.
David W Trost; Hong Lei Zhang; Martin R Prince; Priscilla A Winchester; Yi Wang; Richard Watts; Thomas A Sos
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Publication Detail:
Type:  Comparative Study; 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 Dec 
Date Detail:
Created Date:  2004-11-26     Completed Date:  2005-04-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9105850     Medline TA:  J Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  975-80     Citation Subset:  IM    
Copyright Information:
2004 Wiley-Liss, Inc.
Department of Radiology, Weill Cornell Medical College, New York, New York 10022, USA.
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MeSH Terms
Aged, 80 and over
Angiography, Digital Subtraction
Celiac Artery / pathology,  radiography
Contrast Media
Diatrizoate Meglumine / diagnostic use
Gadolinium DTPA / diagnostic use
Iliac Artery / pathology,  radiography
Imaging, Three-Dimensional*
Magnetic Resonance Angiography*
Mesenteric Artery, Superior / pathology,  radiography
Middle Aged
Renal Artery / pathology,  radiography
Reg. No./Substance:
0/Contrast Media; 131-49-7/Diatrizoate Meglumine; 7440-06-4/Platinum; 80529-93-7/Gadolinium DTPA

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