| 摘要 |
PURPOSE:To correctly recognize an irradiating field by recognizing an area surrounded by contour lines when contour points on both ends among predetermined three or more contour points on the same straight line are moved to the intersecting points with the straight lines which pass through the neighboring contour point not standing on said straight line and intersect orthogonally said straight line to be the irradiating field. CONSTITUTION:After the contour point a1 to a8 are obtained once, when the contour point of the predetermined number over three, for instance, a8, a1, a3 and a6, a2, a5 are positioned on the straight lines A1, A2, the contour point a8, a3 and a6, a5 of both the ends standing on the straight lines A1, A2 respective ly are moved to the intersecting point a3', a5', a6', a8' with the straight lines B1, B2 which pass through the neighboring contour points a4, a7 and intersect orthogonally the straight lines A1, A2. Then, the area 8 surrounded by lines lying along the contour points a1, a3', a4, a5', a2, a6', a7, A8' is recognized as a radioactive ray irradiating field. Thus, the irradiating field can be recognized correctly. |
