Investigation of aortocoronary artery bypass grafts by multislice spiral computed tomography with electrocardiographic-gated image reconstruction

Diagnostic accuracy of 64-slice multidetector computed tomography in evaluation of post-coronary artery bypass grafts in correlation with invasive coronary angiography

“…7 In our study, the overall scan time varied from 8 seconds to 12 seconds, significantly decreased as compared to the previous 4-slice (40 seconds) and 16-slice (30 seconds) scanners. [8][9][10] In our study, because of increased scan speed and volume coverage, in all patients we could cover the origin of LIMA grafts in spite of maintaining the breath hold within reasonable limits.…”

Evaluation of Coronary Artery Bypass by CT Coronary Angiography

“…Four-row CT provided an anisotropic resolution, which oftentimes did not depict the distal anastomosis, and 38% of the patent grafts could not be evaluated because of respiratory/ Coronary Artery Bypass Graft Surgerymotion/metallic clip artifacts [10,11]. Sixteen-row CT scanners improved assessment of occlusion/significant stenosis; however, about 20% were not assessable because of artifacts [12,13].…”

Sixty-four–slice multidetector computed tomography: the future of ED cardiac care

“…One method for limiting dose is using an electrocardiogram-dependent tube current modulation in which the tube pulses radiation triggered by R waves detected by electrocardiogram [54]. This method was used by Ropers and colleagues and resulted in radiation doses averaging 7.45 mSv for men and 10.24 mSv for women [55]. However, this technique does not allow retrospective reconstruction of images in additional phases of the cardiac cycle and will result in suboptimal image quality whenever there is a slight arrhythmia.…”