| 摘要 |
PROBLEM TO BE SOLVED: To appropriately evaluate the exposure of a subject and the image quality of an image when performing radiation output modulation to reduce a radiation output to be smaller than that in a normal case by a predetermined view angle range in order to reduce the exposure of a high radiation-sensitive region near the body surface of the subject in scanning with a radiation tomograph.SOLUTION: Two ranges are displayed. The one range is a desired first range DR that is designated in the body axial direction of a subject. The other range is a second range ER that is different from the first range DR and is supposed to be substantially affected by the effect of radiation output modulation when the radiation output modulation is performed thereby to irradiate the first range DR with a radiation that receives the radiation output modulation and also the radiation output modulation is performed in accordance with the condition of the radiation output modulation determined in consideration of scan characteristics. Consequently, the unintended exposure reduction is recognized. |
