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, Liberte 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 kappa = 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.
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, Liberte 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 kappa = 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.
Authors: Ullrich Ebersberger; Francesco Tricarico; U Joseph Schoepf; Philipp Blanke; J Reid Spears; Garrett W Rowe; William T Halligan; Thomas Henzler; Fabian Bamberg; Alexander W Leber; Ellen Hoffmann; Paul Apfaltrer Journal: Eur Radiol Date: 2012-07-10 Impact factor: 5.315
Authors: Florian Wolf; Sebastian Leschka; Christian Loewe; Peter Homolka; Christina Plank; Ruediger Schernthaner; Dominik Bercaczy; Robert Goetti; Johannes Lammer; Guy Friedrich; Borut Marincek; Hatem Alkadhi; Gudrun Feuchtner Journal: Eur Radiol Date: 2010-04-16 Impact factor: 5.315
Authors: Bernhard Bischoff; Simon Deseive; Martin Rampp; Andrei Todica; Marc Wermke; Stefan Martinoff; Steffen Massberg; Maximilian F Reiser; Hans-Christoph Becker; Jörg Hausleiter Journal: Int J Cardiovasc Imaging Date: 2016-11-15 Impact factor: 2.357
Authors: Ricardo C Cury; Gudrun Feutchner; Constantino S Pena; Warren R Janowitz; Barry T Katzen; Jack A Ziffer Journal: J Nucl Cardiol Date: 2008 Jul-Aug Impact factor: 5.952