Isotropic half-millimeter angiography of coronary artery bypass grafts with 16-slice computed tomography.

摘要: Abstract Background Computed tomography (CT) with four detector rows and magnetic resonance imaging (MRI) are still of limited value for the assessment coronary artery bypass grafts (CABG). We investigated abilities 16-slice CT in these patients. Methods A retrospective analysis all noninvasive angiographies multislice computed (MSCT; Aquilion, Toshiba) on patients CABG referred to our institution between October 2002 April 2003 was conducted. MSCT angiography performed using a standard protocol (0.5-seconds rotation time, 16×0.5 mm collimation, 120 kV, 250 300 mA, 0.25 pitch). None received β-blockers reduce heart rate. Seventy-five CABGs (20 arterial 55 venous grafts) 27 were evaluated patency adequate diagnostic quality by two radiologists consensus. Results All depicted eligible evaluation. Fifteen occlusions five significant stenoses (at least 50%) could be identified. proximal 99% distal anastomoses eligible. One anastomosis an graft not assessable due surgical clip artifacts. The length acquisition window 174 ± 46 ms (range 71 234 ms). majority (70%) had rate above 65 beats/min. However, improved temporal spatial resolution none examinations insufficient image quality. Conclusions 16 isotropic high reliably depicts