2016_Imaging for Physicists

Comparison CBCT and CT FPD CT scanners are inferior to CT scanners with regard to: • Output of the x-ray tube, output is higher for CT scanners (noise) • Axial coverage (field of view), coverage is better for CT scanners • Rotation speed, CT scanners rotate faster • Quality of the detector, CT scanner detectors have better performance FPD CT scanners are superior to CT scanners with regard to: • Spatial resolution (voxel size, not so much in radiotherapy) • Z-axis coverage