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公开(公告)号：US20220379138A1
公开(公告)日：2022-12-01
申请号：US17724582
申请日：2022-04-20
Applicant: Hitachi, Ltd.
Inventor： Takuto MIYOSHI , Shinichirou FUJITAKA , Taisuke TAKAYANAGI
Abstract: A correlation between a CT value and a water equivalent thickness ratio distribution for each patient can be corrected without increasing a treatment time, and more accurate treatment can be realized. A treatment planning system 112 which generates a treatment plan for irradiating an irradiation target with a particle beam calculates a correction amount of a water equivalent thickness ratio of a first treatment plan created in advance, calculates a water equivalent thickness ratio distribution based on the correction amount and the first treatment plan, and creates a second treatment plan from the water equivalent thickness distribution.
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2.发明申请公开(公告)号：US20170304651A1
公开(公告)日：2017-10-26
申请号：US15513276
申请日：2015-05-12
Applicant: HITACHI, LTD.
Inventor： Taisuke TAKAYANAGI , Shusuke HIRAYAMA , Shinichiro FUJITAKA
IPC: A61N5/10
CPC classification number: A61N5/1031 , A61N5/10 , A61N5/1043 , A61N2005/1034 , A61N2005/1087
Abstract: A radiation therapy planning apparatus performs dose calculation at high speed and with high accuracy for radiation therapy in a scanning irradiation method. The apparatus includes a display, an arithmetic processing apparatus, a memory, and a data server, which is connected to a particle beam irradiation apparatus. A dose calculation unit of the arithmetic processing apparatus calculates dose distribution by a simplified Monte Carlo algorithm, and corrects the dose distribution by a decreasing rate stored in a particle number decreasing rate table of the memory, and stores the corrected dose distribution in an integrated dose distribution table. By using the simplified Monte Carlo algorithm and the particle number decreasing rate that corrects the simplified Monte Carlo algorithm, the dose distribution is calculated, and thereby, it is possible to realize a radiation therapy planning apparatus that performs dose calculation at a high speed with high accuracy.
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公开(公告)号：US20150374324A1
公开(公告)日：2015-12-31
申请号：US14655192
申请日：2013-10-10
Inventor： Arao NISHIMURA , Koji MATSUDA , Ryosuke SHINAGAWA , Taisuke TAKAYANAGI , Masahiro TADOKORO , Takao KIDANI , Hideaki NIHONGI , Kikuo UMEGAKI , Taeko MATSUURA
CPC classification number: A61B6/542 , A61N5/1049 , A61N5/1067 , A61N5/1071 , A61N5/1075 , A61N5/1077 , A61N2005/1061 , A61N2005/1074 , A61N2005/1087 , F04C2270/041
Abstract: There is provided a particle therapy system including: a particle beam generator for generating a particle beam; an irradiation nozzle arranged in a treatment room and irradiating a target with the particle beam; a particle beam transport system 6 communicating the particle beam generator with the irradiation nozzle; an X-ray imaging device arranged in the treatment room and imaging the position of the target through irradiation with X-rays; a dosimeter 8 arranged at a position passed by the particle beam in the irradiation nozzle; and a control apparatus 400 performing control to exclude the measurement result of the X-rays from the measurement result obtained using the dosimeter 8 when the X-rays are emitted during treatment.
Abstract translation: 提供了一种粒子治疗系统，包括：粒子束发生器，用于产生粒子束; 照射喷嘴，布置在处理室中并用粒子束照射目标; 将粒子束发生器与照射喷嘴连通的粒子束传送系统6; 设置在治疗室内的X射线成像装置，通过X射线照射对靶的位置成像; 设置在所述照射喷嘴中通过所述粒子束的位置处的剂量计8; 以及控制装置400，执行控制，以便在处理期间发射X射线时，使用剂量计8获得的测量结果排除X射线的测量结果。
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4.发明申请RADIATION MEASURING DEVICE, PARTICLE BEAM THERAPY DEVICE PROVIDED WITH RADIATION MEASURING DEVICE, AND METHOD FOR CALCULATING DOSE PROFILE OF PARTICLE BEAM 有权辐射测量装置，辐射测量装置提供的颗粒束治疗装置，以及用于计算颗粒束的剂量分布的方法公开(公告)号：US20150099918A1
公开(公告)日：2015-04-09
申请号：US14497891
申请日：2014-09-26
Applicant: HITACHI, LTD.
Inventor： Taisuke TAKAYANAGI , Shinichiro FUJITAKA , Chihiro NAKASHIMA , Koji MATSUDA
CPC classification number: A61N5/1071 , G01T1/02 , G01T1/29
Abstract: A radiation measuring device having a plurality of sensors configured to generate charges in response to the radiation includes a signal processing device. The signal processing device uses an signal generated by a proton beam irradiation device upon changing of beam energy and causes accumulation values of charges output from the sensors to be separately stored in a main control device for each value of the energy. The main control device calculates depth dose profiles for values of the beam energy from the accumulation values stored in the main control device and representing the charges. The main control device calculates a range of the beam for each of the values of the beam energy from the depth dose profiles, corrects the depth dose profiles for the values of the beam energy using a correction coefficient that depends on the range and sums the corrected depth dose profiles.
Abstract translation: 具有被配置为响应于辐射产生电荷的多个传感器的辐射测量装置包括信号处理装置。 信号处理装置在改变光束能量时使用由质子束照射装置产生的信号，并且使得从各个传感器输出的电荷的积累值分别存储在主控制装置中，用于每个能量值。 主控制装置根据存储在主控装置中的积累值计算束能量的深度剂量分布，并表示电荷。 主控制装置根据深度剂量分布计算波束能量的每个值的波束的范围，使用取决于范围的校正系数校正波束能量的深度剂量分布，并且将校正的 深度剂量分布。
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公开(公告)号：US20240285972A1
公开(公告)日：2024-08-29
申请号：US18375597
申请日：2023-10-02
Inventor： Taisuke TAKAYANAGI , Takahiro YAMADA , Shusuke HIRAYAMA , Koichi MIYAZAKI , Keiji KOBASHI , Hidefumi AOYAMA , Takayuki HASHIMOTO , Norio KATOH , Hiroshi TAGUCHI , Koichi YASUDA , Yasuhito ONODERA
IPC: A61N5/10
CPC classification number: A61N5/1038 , A61N5/1064 , A61N2005/1092
Abstract: A treatment planning system is configured to create a treatment planning for radiotherapy and includes a processing device and a memory. The memory stores a plurality of calculation models, and the processing device uses at least two of the plurality of calculation models to calculate calculation values of biological effect indices representing an effect of radiotherapy with respect to a condition for radiotherapy, and searches for the condition so that at least two of the calculation values to be calculated approach a predetermined target value.
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Patent Agency Ranking
公开(公告)号：US20180126188A1
公开(公告)日：2018-05-10
申请号：US15805566
申请日：2017-11-07
Inventor： Taisuke TAKAYANAGI , Toru UMEKAWA , Shinichiro FUJITAKA , Seishin TAKAO
IPC: A61N5/10
CPC classification number: A61N5/1031 , A61N5/1038 , A61N2005/1087
Abstract: Provided are a radiation treatment planning system and a radiation treatment system that are capable of achieving time shortening and labor saving of treatment planning making when a radiation treatment is planned. A predicted DVH calculation portion 4034 of an arithmetic processing device 403 in a radiation treatment planning system 400 anisotropically enlarges a target region 501 in an irradiated body image which is input to the radiation treatment planning system 400, and calculates an overlap volume OV with an organ-at-risk region 502 per the number of times of enlargement. A DVH (Dose Volume Histogram) is predicted from a volume of the calculated OV, and a dose histogram in the OV per the number of times of enlargement which is calculated from a past treatment planning data group, and is displayed on a display device 401.
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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。
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公开(公告)号：US20220314027A1
公开(公告)日：2022-10-06
申请号：US17546505
申请日：2021-12-09
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.
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公开(公告)号：US20180326224A1
公开(公告)日：2018-11-15
申请号：US15775197
申请日：2015-11-13
Applicant: HITACHI, LTD.
Inventor： Masumi UMEZAWA , Shinichiro FUJITAKA , Taisuke TAKAYANAGI
IPC: A61N5/10
CPC classification number: A61N5/1043 , A61N5/1071 , A61N2005/1072 , A61N2005/1074 , A61N2005/1087 , G21K1/025
Abstract: The invention provides a particle therapy system in which whether to perform any one irradiation method of a raster scanning method and a discrete spot scanning method can also be selected based on previous selection depending on a target volume 41 of a patient 4 to be irradiated, and either of the irradiation methods of the raster scanning method and the discrete spot scanning method is configured to be capable of being performed by one irradiation apparatus 500. Therefore, a small particle therapy system capable of achieving both higher accuracy irradiation and high dose rate improvement is provided.
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公开(公告)号：US20170243665A1
公开(公告)日：2017-08-24
申请号：US15437826
申请日：2017-02-21
Inventor： Taisuke TAKAYANAGI , Shinichiro FUJITAKA , Chihiro NAKASHIMA , Tomoki MURATA , Taeko MATSUURA , Naoki MIYAMOTO , Kikuo UMEGAKI , Yuichi HIRATA
CPC classification number: G21K1/10 , A61N5/1077 , A61N2005/1087 , A61N2005/1095 , G21K5/04 , H05H7/12 , H05H13/04 , H05H2007/004
Abstract: A structure configuring a ridge filter has line symmetry about a line vertical to a depth direction passing the center of the structure. A small structure obtained in such a way that the structure is divided by this line has a bilaterally asymmetric shape about a center line in an iterative direction, and has a point symmetric shape about an intersection between the center line in the iterative direction and the center line in the depth direction. Thicknesses in the iterative direction of an uppermost stream surface and a lowermost stream surface in the depth direction are equal to each other. The structure is configured so that a thick portion in the iterative direction of the uppermost stream surface and the lowermost stream surface is not present in the depth direction.
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