| 摘要 |
PURPOSE:To enhance the reproducibility and accuracy at the time of treatment, by providing a function displaying an image in the same way as a transmitted image to a CRT display apparatus and further optically projecting the radiation field determined after the programming of dose distribution on the skin of a patient and drawing a mark on the skin as the target at the time of radiation treatment. CONSTITUTION:The CT image from a CT apparatus 1 is sent to a dose distribution computer 6 to form the dose distribution program for optimizing the irradiation condition to a patient 3. The optimum radiation field formed by the dose distribution computer 6 is sent to a transmitted image display CRT 51 through an image processor 5 and the transmitted image display CRT 51 displays a radiation field dimension 55 on a transmitted image 53 in a superposed state. Said radiation field dimension 55 is the same one as the transmitted image obtained by irradiating the patient 3 with X-rays in the arbitrary radiation field around the patient 3. The data of the radiation field dimension thus confirmed and selected as the optimum one and the position and angle thereof are transmitted to a flood light projector 2 from the image processor 5 to project radiation on the surface of the body of the patient by an optical method. By drawing a mark on the skin along the edge of the radiation field figure projected on the skin, the accuracy and reproducibility of treatment can be secured.
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