PROBLEM TO BE SOLVED: To solve the problem that, in a case where overheat of a bulb of an X-ray tube occurs during an inspection of an X-ray device, the inspection is interrupted and the inspection is interrupted for a long time until the bulb is cooled.SOLUTION: A control circuit of an X-ray high-voltage device calculates a heat quantity of an X-ray bulb that is generated during one inspection, predicts a heat quantity of the X-ray bulb in inspection end before starting the inspection, judges, for example, whether the heat quantity of the X-ray bulb exceeds 80% of an X-ray tube heat quantity after the end of the inspection (S05), and in such a case, starts a mode in which heat evolution of the X-ray bulb is suppressed. In the mode in which the heat evolution is suppressed, an inspection content and a body thickness are selected when starting the inspection, thereby reading out maximum photographic conditions in the case of conventional similar inspections from a table storing the same (S06). A minimum anode rotation speed required for the selected inspection is calculated (S07), a starter application voltage is reduced, thereby realizing the minimum anode rotation speed, and the heat evolution of the X-ray bulb is suppressed.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】X線装置の検査中にX線管の管球のオーバーヒートが起こった際には、検査が中断され、かつ管球が冷却されるまで長時間検査が中断されていた。【解決手段】X管高電圧装置の制御回路は、1検査で発生するX線管球の熱量を計算し、検査開始する前に検査終了時のX線管球の熱量を予測し、X線管球の熱量が検査終了後に例えばX線管熱量が80%を超えるか否か判断し(S05)、超えそうな場合には、X線管球の発熱を抑えるモードに入る。この発熱を抑えるモードでは、検査開始時に検査内容及び体厚を選択することで、従来の同じような検査の際の最大撮影条件を蓄積するテーブルから読み出し(S06)、選択した検査に必要な最低陽極回転数を算出し(S07)、スタータ印加電圧を低下させることで最低陽極回転数を実現し、X線管球の発熱を抑える。【選択図】図2
