[Evaluation of compensation filter in I.I.-DR gastrointestinal examination using image pick-up tube]

We have especially the thing which experiences daily and which digital value does saturate by the difference of patient, and the air content of internal organs, at the time of I.I.-DR gastrointestinal examination. In order to compensate digital value of those parts, the compensation filter by the remote operation formula was examined. The quality of the material of the created filter determined thickness and form from change of digital value when changing thickness, and a dose using aluminum. The image which carried out saturate as a result of analyzing this 500 images decreased to 15% to 3%. Moreover, the total skin dose decreased on the same photography conditions, and was almost equivalent in the time of phototimer use. The part not conventionally materialized as an image for saturation has been improved by using a compensation filter for gastrointestinal examination, and it was enabled to obtain a useful picture clinically.