公开(公告)号：US20220355129A1

公开(公告)日：2022-11-10

申请号：US17760548

申请日：2020-06-24

Applicant: HITACHI, LTD.

Inventor： Yusuke FUJII ,  Manabu AOKI ,  Masumi UMEZAWA

IPC: A61N5/10 ,  A61B5/055

Abstract: The system includes a bed on which an irradiation target is mounted, an irradiation device that irradiates the irradiation target with a particle beam, and a magnetic resonance imaging apparatus that captures an image of an irradiation object and includes a magnet that generates a static magnetic field in an image capturing space in which the irradiation target is disposed, and a yoke disposed outside the image capturing space and through which a magnetic flux of the generated magnetic field passes. The irradiation device 21 is disposed on a back surface side of the yoke when viewed from the image capturing space, and irradiates the irradiation target with the particle beam from a through-hole or gap provided in the yoke. A direction in which the particle beam enters the image capturing space intersects with a direction of a static magnetic field applied to the image capturing space by the magnet.

公开(公告)号：US20210012500A1

公开(公告)日：2021-01-14

申请号：US16703987

申请日：2019-12-05

Applicant: Hitachi, Ltd.

Inventor： Koichi MIYAZAKI ,  Toru UMEKAWA ,  Yusuke FUJII

IPC: G06T7/00 ,  G06T7/70 ,  G06T7/20 ,  G06T5/10 ,  G01N23/04

Abstract: The moving object tracking apparatus emphasizes an image with specific size in each of fluoroscopic images derived from two or more paired fluoroscopic radiographic devices, obtains a value indicating certainty degree of detecting a candidate position of the object to be tracked on the image subjected to the emphasizing process, extracts the candidate position based on the value indicating the certainty degree of detection, calculates a value indicating a correlation between the candidate position extracted from images picked up from two or more directions, and a position of the fluoroscopic radiation generator, detects the position of the object to be tracked based on the value indicating the certainty degree of detection, and the value indicating the correlation, and controls irradiation of radiation to an irradiation target based on the detected position of the object to be tracked.

公开(公告)号：US20190299027A1

公开(公告)日：2019-10-03

申请号：US16250262

申请日：2019-01-17

Applicant: Hitachi, Ltd.

Inventor： Yusuke FUJII ,  Shinichiro FUJITAKA

IPC: A61N5/10 ,  G16H30/20 ,  G16H20/40

Abstract: A therapy planning apparatus is configured to: discretize an irradiation amount with which a particle beam is irradiated during an irradiation position change for calculation; associate a series of 3D CT images included in a 4D CT image with elapsed time information from start to completion of irradiation of a particle beam; distribute the irradiation amount discretized for the calculation to the 3D CT images based on the 3D CT images and the elapsed time information that are associated; calculate a dose distribution of the particle beam on the 3D CT images to which the irradiation amount is distributed; calculate corresponding positions between the 3D CT images based on non-rigid registration; and integrate a dose distribution formed for each of the 3D CT images during an irradiation period for each of the corresponding positions between the 3D CT images from start to completion of the irradiation of the particle beam.

公开(公告)号：US20140316184A1

公开(公告)日：2014-10-23

申请号：US14318881

申请日：2014-06-30

Applicant: HITACHI, LTD.

Inventor： Rintaro FUJIMOTO ,  Yoshihiko NAGAMINE ,  Masumi UMEZAWA ,  Toru UMEKAWA ,  Yusuke FUJII ,  Hiroshi AKIYAMA

IPC: A61N5/10

CPC classification number: A61N5/1065 ,  A61N5/103 ,  A61N5/1043 ,  A61N2005/1087

Abstract: In a particle therapy treatment planning system for creating treatment plan data, the movement of a target (patient's affected area) is extracted from plural tomography images of the target, and the direction of scanning is determined by projecting the extracted movement on a scanning plane scanned by scanning magnets. Irradiation positions are arranged on straight lines parallel with the scanning direction making it possible to calculate a scanning path for causing scanning to be made mainly along the direction of movement of the target. The treatment planning system can thereby realize dose distribution with improved uniformity.

公开(公告)号：US20130221213A1

公开(公告)日：2013-08-29

申请号：US13776002

申请日：2013-02-25

Applicant: HITACHI, LTD.

Inventor： Taisuke TAKAYANAGI ,  Hideaki NISHIUCHI ,  Masahiro TADOKORO ,  Yusuke FUJII ,  Takeji SAKAE ,  Toshiyuki TERUNUMA

IPC: G01T7/00

CPC classification number: G01T7/005 ,  A61N5/1048 ,  A61N5/1075 ,  A61N2005/1087 ,  G01T1/29

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20150290475A1

公开(公告)日：2015-10-15

申请号：US14726824

申请日：2015-06-01

Applicant: HITACHI, LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Yusuke FUJII ,  Toru UMEKAWA ,  Masumi UMEZAWA ,  Hiroki SHIRATO ,  Kikuo UMEGAKI ,  Naoki MIYAMOTO ,  Taeko MATSUURA

IPC: A61N5/10

CPC classification number: A61N5/1068 ,  A61N5/1077 ,  A61N2005/1074 ,  A61N2005/1087

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20140031602A1

公开(公告)日：2014-01-30

申请号：US13951621

申请日：2013-07-26

Applicant: HITACHI, LTD.

Inventor： Rintaro FUJIMOTO ,  Yoshihiko NAGAMINE ,  Yusuke FUJII

IPC: A61N5/10

CPC classification number: A61N5/1037 ,  A61N5/1031 ,  A61N5/1043 ,  A61N2005/1087

Abstract: A treatment planning system is provided which, with irradiation parameters varied over time, performs highly accurate dose distribution calculations based on information about tumor movements included in 4D CT images. The system is characterized by the ability to read CT images furnished with timing information and associate the status of the irradiation target corresponding to an elapsed time from the beginning of irradiation with positions being irradiated at corresponding elapsed time points so as to calculate the dose distribution.

Abstract translation: 提供了治疗计划系统，其随着时间的推移随着照射参数的变化，基于包括在4D CT图像中的肿瘤移动的信息进行高度精确的剂量分布计算。 该系统的特征在于能够读取具有定时信息的CT图像，并将与照射开始时间相对应的照射目标的状态与在相应的经过时间点照射的位置相关联，以计算剂量分布。

公开(公告)号：US20220314027A1

公开(公告)日：2022-10-06

申请号：US17546505

申请日：2021-12-09

Applicant: Hitachi, Ltd. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Taisuke TAKAYANAGI ,  Takahiro YAMADA ,  Yusuke FUJII ,  Toru UMEKAWA ,  Hiroki SHIRATO ,  Shinichi SHIMIZU ,  Taeko MATSUURA ,  Naoki MIYAMOTO ,  Seishin TAKAO ,  Yuichi HIRATA ,  Sodai TANAKA

IPC: A61N5/10

Abstract: A treatment planning system that generates treatment planning for irradiating a target with a particle beam, includes an arithmetic processing device that sets at least two or more irradiation patterns for one treatment planning, calculates a plurality of predicted dose distributions for each irradiation pattern based on a target dose set for each region for at least one region including a region of the target, and calculates an index for evaluating validity of the irradiation pattern based on the plurality of predicted dose distributions.

公开(公告)号：US20190111282A1

公开(公告)日：2019-04-18

申请号：US16088534

申请日：2017-03-30

Applicant: HITACHI, LTD. ,  NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY

Inventor： Takahiro YAMADA ,  Toru UMEKAWA ,  Yusuke FUJII ,  Naoki MIYAMOTO ,  Kikuo UMEGAKI

IPC: A61N5/10

Abstract: A tumor tracking control device (41) performs windowing process on a captured image A (61) and a captured image B (62), measures a position of a marker (29) using the captured image A (61) and the captured image B (62) after performing the windowing process, and generates a signal capable of controlling irradiation with radiation based on the position of the marker (29). Accordingly, it is possible to provide a tumor tracking apparatus and an irradiation system which are capable of tracking an object to be tracked without erroneous detection, even in a case where a structure similar to the object to be tracked is in the vicinity of the object to be tracked, in tumor tracking.

公开(公告)号：US20130083895A1

公开(公告)日：2013-04-04

申请号：US13632480

申请日：2012-10-01

Applicant: HITACHI, LTD.

Inventor： Toru UMEKAWA ,  Yusuke FUJII

IPC: G01N23/04

CPC classification number: A61N5/1049 ,  A61B6/06 ,  A61B6/4014 ,  A61B6/542 ,  A61N2005/1061

Abstract: A real-time tracking radiotherapy system includes, therapeutic radiation irradiation device, at least two X-ray imaging devices, a target position recognizing section, a therapeutic radiation irradiation control section, each X-ray imaging device including an X-ray, an X-ray detector, and X-ray variable diaphragms, a transit region calculation section, a radiography range setting section, and a diaphragm control section. The real-time tracking radiotherapy system is capable of appropriately setting a radiography range using a computed transit region of a target or an surrogate marker and achieving a reduction in the amount of X-ray exposure.

Abstract translation: 实时跟踪放射线治疗系统包括治疗放射线照射装置，至少两个X射线摄像装置，目标位置识别部，治疗放射线照射控制部，X射线摄影装置，X射线 射线检测器和X射线可变光阑，过渡区域计算部，射线照相范围设定部和光阑控制部。 实时跟踪放射治疗系统能够使用计算出的目标或替代标记的运送区域适当地设置射线照相范围，并且实现X射线曝光量的减少。