Hitachi, Ltd.

Hokkaido University

Other

Olympus Corporation

Institute of National Colleges of Technology, Japan

Hiroki Shirato

Kikuo Umegaki

Yusuke Vincent Fujii

Taeko Matsuura

Shinichi Shimizu

Toru Umekawa

Naoki Miyamoto

Masumi Umezawa

Masahiro Yoshida

Taisuke Takayanagi

Rintarou Fujimoto

Tatsuya Saito

Kazuo Hiramoto

Koji Matsuda

Ryuya Ando

Manabu Aoki

Keiji Kobashi

Shinichiro Fujitaka

Tatsuya Kunieda

Seishin Takao

Shusuke Hirayama

Chihiro Nakashima

Arao Nishimura

Yusuke Fujii

Yuichi Hirata

Ryosuke Shinagawa

Junichi Kaneko

Hiroyuki Date

Sodai Tanaka

Rikiya Onimaru

Shigeaki Ogura

Yuka Matsuzaki

Fumiyuki Fujita

Hidenori Koyano

Eiji Takada

Masahiro Mizuta

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.

Treatment planning system, treatment planning generation method, and recording medium

A particle therapy system includes an acceleratorwhich generates a particle beam for extraction, an irradiation apparatuswhich irradiates the particle beam to an irradiation target, a gantrywhich rotates together with the irradiation apparatus, and an MRI apparatuswhich rotates together with the gantry. The MRI apparatusincludes a magnetic circuit composed of an iron coreand a plurality of coilsserving as a magnetic flux source. The iron coreincludes two oppositely disposed magnetic polesA andB, and a return yokefor connecting the magnetic polesA andB. The magnetic polesA,B have cavitiesA,B. The particle beam passing through the cavityA is irradiated to the irradiation target

Particle therapy system

A treatment planning apparatusor a clinical decision support apparatuscalculates a dose distribution, calculates the damage to a normal tissue for a plurality of number of times of radiation irradiation based on the calculated dose distribution, and displays at least one or more calculated damages to the normal tissues on display apparatusesandor outputs the same to an outside of the apparatusesand. Accordingly, since effects can be calculated for a plurality of number of times of irradiation, the optimum number of time of irradiation can be presented, and an operator and a doctor can be presented with a suitable decision material of a radiation irradiation planning.

Radiation irradiation planning apparatus, clinical decision support apparatus and program

An image processor applies computation processing to a plurality of CT images formed by irradiation of radiation of a plurality of energy levels to acquire monochromatic CT images. The image processor acquires a first energy level CT image formed by irradiation of first energy level radiation and a second energy level CT image formed by irradiation of second energy level radiation, applies a plurality of weighted computations to the first and second energy level CT images to compute a plurality of monochromatic CT images as a result of the weighted computations, segments a surrounding region of a highly-absorbent material circumferentially into a plurality of regions of interest having a predetermined area and calculates a standard deviation of the surrounding region by using a mean value of image data of each region of interest, for each monochromatic CT image, and selects a monochromatic CT image with a small standard deviation.

Creating monochromatic CT image

A function/process of recording marker position data and spot data is provided. The marker position data includes position information of a markermeasured for tumor tracking irradiation and information on time of execution of X-ray imaging. The spot data includes information on time of irradiation of each spot, a delivered irradiation position, and a delivered irradiation amount. The marker position data and the spot data are synchronized based on the time information, and by using the marker position data and the spot data upon spot irradiation, a delivered dose distribution of proton irradiation is calculated. With this configuration, it is possible to take the influence of interplay effect into consideration, and it is possible to support to make more appropriate determination upon replanning of a treatment plan.

Dose evaluation system, planning system, particle irradiation system and dose evaluation method

First ions and second ions that are heavier than first ions are generated in an ion source. One kind of ions of the first ions and second ions is injected into an accelerator by action of a switching magnet and accelerated in the accelerator. An ion beam including the one kind of ions is extracted from the accelerator to a beam transport system and a tumor volume of a patient is irradiated with the ion beam from an irradiation nozzle. In the irradiation of the ion beam, a tumor volume depth and the largest underwater range of each ion species are compared, and an ion species in which the tumor volume depth becomes the longest underwater range or lower is injected into the accelerator, and accelerated by the accelerator. The tumor volume is irradiated with the ion species.

Charged particle beam system

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.

System for irradiating charged particles and method for irradiating charged particles

The present invention provides a particle therapy system including an irradiation compensating device made up of an energy absorber, a first collimator, and a second collimator for use in a short-range region. The irradiation compensating device is characterized by a mechanism for attaching and detaching the first energy absorber, first collimator, and second collimator. The first collimator is located upstream where the beam diameter is small with a view to suppressing the width of the compensating device, thereby contributing to making the compensating device small and lightweight. The second collimator is located downstream to improve penumbrae.

There is provided a transendoscopic medical instrument which can insert, remove and latch a plurality of medical items including a flexible guide unit with respect to a transendoscopic sheath which is selectively inserted into a body cavity such as a bronchial branch.

Transendoscopic medical instrument

A dynamic tumor radiation treatment program for causing a computer to function. The program includes detecting an annihilation gamma ray with a gamma ray detector, storing the threshold of counting rate in a displacement threshold memory, computing the counting rate according to the detection signal of an annihilation gamma ray with a gamma ray counting rate computer, comparing the counting rate of annihilation gamma rays acquired from the gamma ray counting rate computer with the threshold of the counting rate acquired from the displacement threshold storage memory by means of a threshold comparator, judging whether or not the tumor is displaced out of the radiation irradiation spot by means of a tumor position judging unit, and making a control to stop radiation irradiation or outputting a stop command signal by means of an irradiation controller.

Dynamic tumor radiation treatment apparatus and program

A moving body pursuit irradiating device has plural X-ray fluoroscopes for picking up the image of a tumor marker buried in the vicinity of a tumor, and recognition processing sections which execute template matching by a shading normalization mutual correlation method, further calculating three-dimensional coordinates of the tumor marker from the two-dimensional coordinates calculated by the recognition processing sections, and controlling the medical treatment beam of a linac.

Moving body pursuit irradiating device and positioning method using this device

Growing community of inventors

Sapporo, Japan

Hiroki Shirato