PURPOSE: To compare the use of a new 64-slice computed tomography (CT) scanner with 16-slice CT in the visualization of coronary artery stent lumen. MATERIAL AND METHODS: Eight different coronary artery stents, each with a diameter of 3 mm, were placed in a static chest phantom. The phantom was positioned in the CT gantry at an angle of 0 degrees and 45 degrees towards the z-axis and examined with both a 64-slice and a 16-slice CT scanner. Effective slice thickness was 0.6 mm with 64-slice CT and 1 mm with 16-slice CT. A reconstruction increment of 0.3 mm was applied in both scanners. Image quality was assessed visually using a 5-point grading scale. Stent diameters were measured and compared using paired Wilcoxon tests. RESULTS: Artificial lumen reduction was significantly less with 64-slice than with 16-slice CT. Average visible stent lumen was 53.4% using 64-slice CT and 47.5% with 16-slice MSCT. Most severe artifacts were seen in stents with radiopaque markers. Using 64-slice CT, image noise increased by approximately 30% due to thinner slice thickness. CONCLUSION: Improved spatial resolution of 64-slice CT resulted in superior assessment of coronary artery stent lumen compared to 16-slice CT. However, a relevant part of the stent lumen is still not assessable with multi-slice CT.
PURPOSE: To compare the use of a new 64-slice computed tomography (CT) scanner with 16-slice CT in the visualization of coronary artery stent lumen. MATERIAL AND METHODS: Eight different coronary artery stents, each with a diameter of 3 mm, were placed in a static chest phantom. The phantom was positioned in the CT gantry at an angle of 0 degrees and 45 degrees towards the z-axis and examined with both a 64-slice and a 16-slice CT scanner. Effective slice thickness was 0.6 mm with 64-slice CT and 1 mm with 16-slice CT. A reconstruction increment of 0.3 mm was applied in both scanners. Image quality was assessed visually using a 5-point grading scale. Stent diameters were measured and compared using paired Wilcoxon tests. RESULTS: Artificial lumen reduction was significantly less with 64-slice than with 16-slice CT. Average visible stent lumen was 53.4% using 64-slice CT and 47.5% with 16-slice MSCT. Most severe artifacts were seen in stents with radiopaque markers. Using 64-slice CT, image noise increased by approximately 30% due to thinner slice thickness. CONCLUSION: Improved spatial resolution of 64-slice CT resulted in superior assessment of coronary artery stent lumen compared to 16-slice CT. However, a relevant part of the stent lumen is still not assessable with multi-slice CT.
Authors: V Chabbert; D Carrie; M Bennaceur; E Maupas; V Lauwers; M Mhem; T Lhermusier; M Elbaz; F Joffre; H Rousseau; J Puel Journal: Eur Radiol Date: 2006-11-18 Impact factor: 5.315
Authors: Filippo Cademartiri; Alessandro Palumbo; Erica Maffei; Giancarlo Casolo; Nico R A Mollet; Bob W Meijboom; Jurgen M Ligthart Journal: Int J Cardiovasc Imaging Date: 2007-02-09 Impact factor: 2.357
Authors: T Schlosser; T Scheuermann; S Ulzheimer; O K Mohrs; M Kühling; P E Albrecht; T Voigtländer; J Barkhausen; A Schmermund Journal: Clin Res Cardiol Date: 2007-08-21 Impact factor: 5.460
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