Quantitative image quality evaluation of pelvic computed tomography-based imaging systems: A novel concept in radiotherapy

摘要

Different cone beam computed tomography (CBCT) systems are commercially available for radiotherapy (RT). The image quality of these systems differs as a consequence of different hardware and software. However, image quality assessment based on images of phantoms and related physical measures usually cannot tell us whether we should prefer one system over the other, in a specific clinical setting. On the other hand, subjective, non-quantitative evaluations based on the preferences of individual observers are often not sufficient either. Therefore, a quantitative evaluation method based on clinically relevant features of images of actual patients is called for.