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    • 1. 发明申请
    • SYSTEM FOR IRRADIATING CHARGED PARTICLES AND METHOD FOR IRRADIATING CHARGED PARTICLES
    • 用于辐射充电颗粒的系统和用于辐射充电颗粒的方法
    • US20150290475A1
    • 2015-10-15
    • US14726824
    • 2015-06-01
    • HITACHI, LTD.NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    • Yusuke FUJIIToru UMEKAWAMasumi UMEZAWAHiroki SHIRATOKikuo UMEGAKINaoki MIYAMOTOTaeko MATSUURA
    • A61N5/10
    • A61N5/1068A61N5/1077A61N2005/1074A61N2005/1087
    • A charged particle irradiation system is capable of shortening the irradiation time and the treatment time by performing efficient irradiation even when irregular variation occurs in the irradiation object during the gating irradiation. The extraction of the beam is stopped upon reception of a regular extraction permission end signal which is outputted based on a regular movement signal. An extractable state maintaining function operates upon the reception of the extraction permission end signal. When a preset standby time elapses without receiving an extraction permission start signal again during the standby time, the extractable state maintaining function finishes its operation and a charged particle beam generator decelerates the beam. Also, the extraction of the beam is stopped due to reception of an irregular extraction permission end signal during the irradiation. When the extraction permission start signal is received again during the standby time, the extraction of the beam is restarted.
    • 带电粒子照射系统即使在门控照射期间在照射物体中发生不规则变化,也能够通过高效照射缩短照射时间和处理时间。 在接收到基于规则移动信号输出的常规提取许可结束信号时,停止提取光束。 可提取状态维持功能在接收到提取许可结束信号时进行操作。 当在待机时间期间经过预设待机时间而不再接收到提取许可开始信号时,可提取状态维持功能完成其操作,并且带电粒子束发生器使光束减速。 此外,由于在照射期间接收到不规则的提取许可结束信号,停止提取光束。 当在待机时间期间再次接收到提取许可开始信号时,重新开始提取光束。
    • 7. 发明申请
    • CALIBRATION METHOD FOR RADIATION DETECTOR, AND PARTICLE THERAPY SYSTEM
    • 辐射检测器和颗粒治疗系统的校准方法
    • US20130221213A1
    • 2013-08-29
    • US13776002
    • 2013-02-25
    • HITACHI, LTD.
    • Taisuke TAKAYANAGIHideaki NISHIUCHIMasahiro TADOKOROYusuke FUJIITakeji SAKAEToshiyuki TERUNUMA
    • G01T7/00
    • G01T7/005A61N5/1048A61N5/1075A61N2005/1087G01T1/29
    • A stacked type of radiation detector and a calibration method that enables the radiation detector to correct variations in sensor-specific output easily and within a short time, without using a water-phantom dose detector. The radiation detector is equipped with a sensor section including a plurality of sensors arranged in layers in a traveling direction of a particle beam. A dummy absorber has water-equivalent thickness equal to an average water-equivalent thickness of the sensors. A signal-processing unit calculates sensor-specific calibration coefficients using a measurement result obtained during irradiation of the radiation detector with the radiation when electrical signals developed in each sensor are measured, and a measurement result obtained during irradiation of the radiation detector with the radiation when the sensor section is moved in the traveling direction of the radiation, then the dummy absorber is set in place, and electrical signals developed in each sensor are measured.
    • 放射线检测器和校准方法的叠层式,能够使辐射探测器能够在短时间内轻松地校正传感器特定输出的变化,而无需使用水体模型剂量检测器。 放射线检测器配备有传感器部分,其包括沿粒子束的行进方向分层布置的多个传感器。 虚拟吸收器的水当量厚度等于传感器的平均水当量厚度。 信号处理单元使用在辐射检测器的照射期间获得的测量结果来计算传感器特定的校准系数,该测量结果在测量每个传感器中显现的电信号时具有辐射,并且在辐射检测器的辐射期间获得的测量结果 传感器部分在辐射的行进方向上移动,然后将该虚拟吸收体置于适当的位置,并测量在每个传感器中显现的电信号。