Coronary stent assessability by 64 slice multi-detector computed tomography

Tej Sheth, Jonathan D. Dodd, Udo Hoffmann, Suhny Abbara, Aloke Finn, Herman K. Gold, Thomas J. Brady, Ricardo C. Cury

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Background: We evaluated the assessability of contemporary stent platforms by 64-slice multi-detector computed tomography (MDCT). Methods: Patients undergoing coronary stenting were included in a prospective protocol of MDCT imaging within 48 hr of stent implantation. MDCT data were acquired using a "Sensation 64" MDCT scanner (Siemens Medical Solutions, Forchheim, Germany). Stent assessability was assessed by two independent blinded observers and disagreement was resolved by a third observer. Assessability was defined at visualization of the in-stent lumen without influence of partial volume effects, beam hardening, motion, calcification, or contrast to noise limitations. Results: Fifty four stents (Cypher n = 25, Vision/Minivision n = 19, Taxus Express n = 8, Liberie n = 1, Driver n = 1) in 44 patients were included in the study. The two independent observers classified 30 of 54 stents (56%) as assessable. Interobserver reproducibility was good with κ = 0.66. Stent size was the most important determinant of assessability. Consistently assessable stents were 3.0 mm or larger (85%), whereas those under 3 mm were mostly nonassessable (26%). Conclusions: Contemporary stent designs evaluated on a 64-slice MDCT scanner showed artifact free assessability only in larger stents. Increase in spatial resolution of MDCT scanners or modifications in stent design will be necessary to noninvasive evaluate stents <3 mm in diameter, where in-stent restenosis is more frequent.

Original languageEnglish (US)
Pages (from-to)933-938
Number of pages6
JournalCatheterization and Cardiovascular Interventions
Issue number7
StatePublished - Jun 1 2007


  • Computed tomography
  • Coronary stents

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine


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