Performance of a prototype fluoroscopic radiotherapy imaging system.

Abstract

An increasing demand exists for the implementation of radiotherapy imaging during routine patient treatment, not only for quality assurance of field alignment, but also to obtain full documentation of the actual radiation treatments given. As the method using conventional portal films has distinct disadvantages, alternative methods are required which preferably are faster and produce images of better quality. This paper describes the performance of a prototype fluoroscopic system in terms of spatial resolution and contrast resolution as well as imaging of patients during routine treatments. The system described appears to be suitable for patient set-up and treatment verification and documentation.