title: Multislice computed tomographic angiography versus digital subtraction angiography in the follow-up of nitinol stents in the superficial femoral artery.
abstract: OBJECTIVE
  To compare quantitative and qualitative parameters obtained from digital subtraction angiography (DSA) with multislice computed tomographic angiography (MSCTA) in the follow-up of superficial femoral artery (SFA) stents.
  
  
  METHODS
  Thirteen patients who had SMART stents implanted in the SFA were examined systematically with DSA and MSCTA (16-row scanner) at 6 months. Quantitative analysis and morphological assessment were performed on DSA images by an independent core laboratory, while the MSCTA images were analyzed by 2 radiologists in consensus. DSA measurements included stent length, minimal lumen diameter and reference diameter at mid stent and 5 mm either side of the stent, and percentage of stenosis. For MSCTA images, lumen area and the minimum, maximum, and mean diameters were also recorded. The images were analyzed qualitatively for diameter stenosis (<50%, 50% to 70%, 71% to 99%, and occlusion), bends, fractures, and calcifications.
  
  
  RESULTS
  There were no statistical differences between lengths of stented segments, diameter measurements, or percentages of stenosis from DSA and MSCTA images. The Bland-Altman method showed good agreement between the 2 methods of measurement. MSCTA detected in-stent proliferation with a diameter stenosis <50% in all 13 cases diagnosed on DSA (there was no stenosis >50%). There were no bends or stent fractures on either set of images. The agreement between DSA and MSCTA for the presence and grading of calcifications was moderate (kappa=0.5).
  
  
  CONCLUSIONS
  MSCTA provided quantitative and qualitative data comparable with DSA in the analysis of SFA nitinol stents.
authors.affiliation: Department of Cardiovascular Radiology, Hôpital Cardiologique, CHRU de Lille, France. s-willoteaux@chru-lille.fr
authors.forename: Serge
authors.initials: S
authors.lastname: Willoteaux
authors.forename: Olivier
authors.initials: O
authors.lastname: Moranne
authors.forename: Stephan H
authors.initials: SH
authors.lastname: Duda
authors.forename: Christophe
authors.initials: C
authors.lastname: Lions
authors.forename: Virginia
authors.initials: V
authors.lastname: Gaxotte
authors.forename: François
authors.initials: F
authors.lastname: Durand
authors.forename: Ziad
authors.initials: Z
authors.lastname: Negawi
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Beregi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D015901:Angiography, Digital Subtraction; D050197:Atherosclerosis / Q000000981:diagnostic imaging / Q000601:surgery; D019917:Blood Vessel Prosthesis Implantation; D002114:Calcinosis / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011857:Radiographic Image Interpretation, Computer-Assisted; D012107:Research Design; D012720:Severity of Illness Index; D015607:Stents; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome
chemical_list: D000497:Alloys; C013616:nitinol