Kabushiki Kaisha Toshiba

Toshiba Medical Systems Corporation

Canon Medical Systems Corporation

Kabushiki Kaishi Toshiba

Yasuo Saito

Hiroaki Miyazaki

Hiroshi Aradate

Emi Tamura

Takuzo Takayama

Miwa Okumura

Katsuyuki Taguchi

Masahiko Yamazaki

Shinsuke Tsukagoshi

Satoru Nakanishi

Hiroaki Nakai

Yasuo Nobuta

Mitsuru Yahata

Hideki Ide

Kenji Igarashi

Kazuyuki Ihira

Masaharu Tsuyuki

Tatsuo Maeda

Yasuhiro Noshi

Akira Nishijima

Manabu Hiraoka

Shuya Nambu

Naruomi Akino

Tatsuro Suzuki

Masaharu Shimizu

Tadaharu Kobayashi

Yasutada Nakagawa

Machiko Iso

Katsuya Yamada

Shigeru Sakuta

Tsuyoshi Hatano

Seiji Fujimoto

Koichi Muraki

Takayuki Matsubayashi

Akihiro Ishida

Masaru Kitamura

Kenji Ushimi

Yuuzo Yoshida

Kouji Honjo

Koichi Miyama

Akiji Wakabayashi

Tsuguo Kishi

Ryuhachiro Doji

An X-ray CT device of an embodiment includes processing circuitry. The processing circuitry acquires data corresponding to energy when X-rays radiated by an X-ray tube are transmitted through a subject. The processing circuitry adjusts conditions including first and second conditions for the data when the data is acquired. The processing circuitry switches the condition between the first condition and the second condition during a fluoroscopic imaging manipulation performed by radiating the X-rays to the subject. The processing circuitry bundles the data discriminated into some of a plurality of energy bins.

X-ray CT device, data processing method, and storage medium

A direct-conversion X-ray detector according to an embodiment includes a plurality of anode electrodes, at least one cathode electrode, and electric-field forming circuitry. The anode electrodes are aligned in a cone angle direction of an incident X-ray. The cathode electrode is positioned on an incident side of an X-ray relative to the anode electrodes, and that opposes the anode electrodes. The electric-field forming circuitry configured to form an electric field in a direction based on a cone angle of the X-ray, between the anode electrodes and the cathode electrode.

Direct-conversion X-ray detector, method of detecting X-ray, and X-ray computed-tomography apparatus

A correction X-ray detector according to an embodiment includes a plurality of detector elements configured to detect an X-ray, and processing circuitry. The processing circuitry is configured to acquire a plurality of output values respectively corresponding to the plurality of the plurality of detector elements. The processing circuitry is further configured to determine the detector elements to be used in generating correction data based on the plurality of output values.

Correction X-ray detector, X-ray CT apparatus, and detector element determining method

A medical image diagnosis apparatus according to an embodiment includes an input circuitry, a scan control circuitry, and a reconstruction control circuitry. The input circuitry receives a specifying operation for specifying, from a region of a first medical image acquired such that the first medical image contains less noise, a region for which a second medical image that is a higher-definition image than the first medical image is acquired. The scan control circuitry adjusts an irradiation region of X-rays in a slice direction and a channel direction such that a part corresponding to the region on which the specifying operation is received by the input circuitry is irradiated with the X-rays. The reconstruction control circuitry performs reconstruction, on the first medical image as an initial image, by the successive approximation method by using projection data collected after the irradiation region of the X-rays is adjusted by the scan control circuitry.

Medical image diagnosis apparatus and control method

According to one embodiment, an X-ray computed tomography apparatus includes data acquisition circuitry and processing circuitry. The data acquisition circuitry is configured to acquire projection data of a first area and projection data of a second area, the first area being an area where the projection data is complete for one rotation, the second area being an area where the projection data is obtained for an angle smaller than the one rotation. The processing circuitry is configured to perform, for at least part of the first area, reconstruction processing using the projection data corresponding to a partial angle among the projection data and to perform, for the second area, reconstruction processing using the projection data of a smaller acquisition range that is smaller than one rotation.

X-ray computed tomography apparatus and image generation apparatus

An X-ray computed tomography (CT) apparatus includes a detector, and processing circuitry. The detector is configured to output, at each incidence of an X-ray photon, a signal enabling measurement of an energy value of the X-ray photon. Processing circuitry is configured to estimate an energy range to be used for imaging based on an imaging condition and to reconstruct X-ray CT image data using counting information to which an energy value within the energy range is associated among pieces of counting information that are collected from individual signals output by the detector at each incidence of an X-ray photon that has been irradiated from an X-ray tube and has passed through a subject, and in which a counting value and an energy value of X-ray photons incident to the detector are associated with each other.

X-ray computed tomography apparatus and control method

In an X-ray CT apparatus of an embodiment, an X-ray tube emits X-rays. A detector detects the X-rays emitted from the X-ray tube and having passed through a subject. Processing circuitry collects projection data based on data detected by the detector. The Processing circuitry generates a reconstructed image from the projection data. A display displays a display image based on the reconstructed image. A input circuitry receives an operation to rotate a first display image based on a first reconstructed image generated by the processing circuitry on a screen of the display, and specify a certain region on a second display image whose axis is in a direction different from a slice direction. The processing circuitry generates a second reconstructed image from the projection data, having higher resolution than that of the first display image, for the certain region.

X-ray CT apparatus and image diagnostic apparatus

Provided is a photon-counting type X-ray CT apparatus according to embodiments including a detector, a first collecting unit, a second collecting unit, and an image reconstruction unit. The detector detects an X-ray and outputs a signal. The first collecting unit collects count data of photons of the X-ray for every energy band with a predetermined time width by using the signal output from the detector. The second collecting unit corrects integration data obtained by integrating the signal with the predetermined time width by using the signal output from the detector. The image reconstruction unit corrects the count data by using the integration data. The image reconstruction unit generates a reconstructed image by performing a reconstructing process on the corrected count data.

Photon-counting type X-ray CT apparatus

A photon-counting type X-ray computed tomography apparatus that comprises a high-voltage generator to generate a voltage signal, an X-ray tube to emit X-rays when the X-ray tube receives the voltage signal from the high-voltage generator, an X-ray detector to detect photons derived from the X-rays emitted from the X-ray tube, and circuitry to count a number of the detected photons with respect to a plurality of energy bands, detect a number of photons in a first energy band that exceeds an energy level corresponding to a voltage value of the voltage signal, and changing a number of photons at a second energy band based on the detected number of photons in the first energy band, to correct for operational limitations of the X-ray detector.

Photon-counting type X-ray computed tomography apparatus and method

A gantry includes two X-ray source rings and a detector ring. Each X-ray source ring includes a plurality of X-ray sources arrayed circumferentially. The detector ring is provided next to the X-ray source ring and includes a plurality of X-ray detectors arrayed circumferentially. Each of the plurality of X-ray detectors detects X-rays from the X-ray source ring. A data collection circuit collects raw data corresponding to the intensity of the detected X-rays. A reconstruction unit reconstructs the collected raw data into a CT image based on digital data.

X-ray computed tomography apparatus and photon counting CT apparatus

According to one embodiment, a flexible wedge filter is arranged between an X-ray tube and an examinee to attenuate a dose according to an X-ray from the X-ray tube. The flexible wedge filter has a plurality of filter moduleshaving a configuration capable of individually changing an X-ray transmission path length in an X-ray shielding material. The PCCT gantry controller individually operates the plurality of filter modules such that a dose according to an X-ray incident to an X-ray detector from the X-ray tube via the examinee is distributed substantially uniformly in spatial.

X-ray imaging apparatus, wedge filter apparatus, and method of controlling wedge filter

According to the present invention, a subject is prompted to take breaths that are different at least in depth, and the subject's motion associated with respiration is captured. A timing when the subject is scanned is controlled according to the captured motion of the subject associated with respiration. A two-dimensional detector formed like a two-dimensional plane detects an X-ray beam having passed through the subject. Data is collected from the two-dimensional detector to acquire volume data on the subject.

X-ray CT apparatus

An X-ray computer tomography apparatus includes an X-ray tube, a two-dimensional array type X-ray detector, a rotating mechanism, a pair of collimators, a collimator moving mechanism which separately moves the pair of collimators in a direction almost parallel to a rotation axis, a reconstruction processing unit which reconstructs image data in a reconstruction range, and a collimator control unit. The collimator control unit controls the position of each collimator in accordance with the distance between an X-ray central plane corresponding to a cone angle 0&#xb0; and an end face of the reconstruction range. The collimator moving mechanism moves each of the pair of collimators in the range from the outermost position corresponding to the maximum cone angle to the innermost position offset from a position corresponding to a cone angle of nearly 0&#xb0; to the opposite side.

X-ray computer tomography apparatus including a pair of separably movable collimators

An X-ray CT scanner includes X-ray tubes including a first X-ray tube and a second X-ray tube having fan angles different from each other, X-ray detectors including a first X-ray detector and a second X-ray detector which are respectively arranged to face the first X-ray tube and the second X-ray tube, collection data processing means for executing weighting processing to each of pieces of collection data including first collection data obtained by the first X-ray detector and second collection data obtained by the second X-ray detector to generate image data combined to be smooth in a direction corresponding to a channel direction of detection elements provided in the X-ray detectors, and image generating section for performing processing including image reconstruction processing with respect to pieces of collection data weighted by the collection data processing section to generate image data.

X-ray CT scanner and data processing method of X-ray CT scanner

The angle of each collimator plate with respect to an X ray focal point is determined by fitting the collimator plate in grooves formed in upper and lower supports each having an integral structure. In addition, the warpage of each collimator plate is corrected and its flatness is maintained by fitting the periphery of the collimator plate which is on the X ray detector side in a corresponding groove of an abutment plate provided on the X ray detection surface side of the upper and lower supports. Furthermore, each collimator plate is supported by the corresponding grooves of the upper and lower supports and the corresponding groove of the abutment plate on at least three sides.

X-ray CT apparatus collimator, method of manufacturing the X-ray CT apparatus collimator, and X-ray CT apparatus

Growing community of inventors

Nasushiobara, Japan

Yasuo Saito