| 摘要 |
PURPOSE:To improve visually recognizing characteristics for a dose distribution by providing a means displaying simultaneously a three dimensional image of a region illustrating a specified dose value of a dose distribution in a body obtd. by a calculation processing and a combined image of an X-ray CT image of a specified cross section of the three dimensional image with a contour line of an X-ray dose distribution. CONSTITUTION:In an in vivo dose distribution display system for planning a radiation therapy, a three dimensional image in a specified dose region is prepd. from a dose data group 4 and the three dimensional image 2 is displayed and a specified cross section 3 is specified on this three dimensional image 2 and an X-ray CT image corresponding to the specified cross section is selected from X-ray CT image group 5. On the other hand, a contour line of X-ray dose distribution is prepd. by selecting a dose data corresponding to the specified cross section from a dose data group 4 and a combined image 1 of the X-ray CT image with the contour line of X-ray dose distribution is displayed by combining the previously selected X-ray CT image and the contour line of X-ray dose distribution. As it is therefore possible to display three-dimensionally regions exhibiting high dose values among in vivo dose distributions obtd. by calculation and to grasp a spacial extension of high dose regions as a visual information, it is possible to improve visually recognizing characteristics.
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