Image storing system for radiation therapy (radiation oncology information system: ROIS) as a branch of diagnostic PACS; implementation and evaluation.

We have implemented the new system that is called as ROIS for storing medical images of the patients underwent radiotherapy as a branch of medium-scale diagnostic PACS. It was estimated that, for about nine years, we can store all medical images of the patients who received radiation therapy under the on-line storage condition. Further, we can retrieve all medical images of the radiotherapy patients on ROIS faster than conventional film library or on the diagnostic PACS, even if the patient had been treated many years ago. Implementation of ROIS provided us a great help in our clinical work.