Kabushiki Kaisha Toshiba

Canon Medical Systems Corporation

Toshiba Medical Systems Corporation

Kobe University

Naoki Sugihara

Masahiro Ozaki

Manabu Hiraoka

Yusuke Toki

Yasuo Nobuta

Hiroaki Nakai

Hiroaki Miyazaki

Tooru Kato

Mikihito Hayashi

Emi Tamura

Nobukatsu Soejima

Yasuko Fujisawa

Shigeharu Ohyu

Manabu Teshigawara

Tomiya Sasaki

Michito Nakayama

Tatsuro Suzuki

Hisashi Tachizaki

Koichiro Kawano

Yutaka Sata

Yoshiharu Ohno

Yuji Hamada

A medical image diagnostic system according to an embodiment includes processing circuitry configured to acquire first information related to an exposure dose of a subject by a radioactive agent administered to the subject, and display reference information for determining imaging conditions of X-ray CT imaging to be performed with respect to the subject on a display, based on the first information and second information related to a reference dose.

Medical image diagnostic system and radiation dose management apparatus

According to one embodiment, a sensitivity correction method includes acquiring count rates for respective pixels in a photon counting detector; preparing incident dose adjustment materials for the respective pixels based on the count rates for the respective pixels; and providing the incident dose adjustment materials in a surface of the photon counting detector.

Sensitivity correction method and photon counting detector

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube and an X-ray detector. The X-ray tube generates X-rays. The X-ray detector includes a first detection area detecting the X-rays and a second detection area detecting the X-rays. The first detection area includes a first scintillator having a first fluorescence decay time, the second detection area includes a second scintillator having a second fluorescence decay time shorter than the first fluorescence decay time. The second detection area is arranged at both ends of the first detection area with respect to a channel direction.

X-ray computed tomography apparatus and x-ray detector

An X-ray CT apparatus according to an embodiment includes an X-ray tube, a photon counting detector, and a processing circuitry. The X-ray tube is configured to generate X-rays. The photon counting detector includes a plurality of detecting elements each configured to output a signal in response to any of the X-rays becoming incident thereto after having passed through an examined subject. The processing circuitry is configured to determine, within a reconstruction region, a first region on which a spectrum reconstructing process is to be performed and a second region on which an energy integral reconstructing process is to be performed, on the basis of output values related to energy spectra based on the signals output by the detecting elements. The processing circuitry is configured to generate an image on the basis of the determined first region and the determined second region.

X-ray CT apparatus and reconstruction processing apparatus

According to one embodiment, a medical imaging analyzer includes an imaging unit, a calculator, and an analyzer. The imaging unit divides an area including an object of a subject to be captured into a plurality of partial areas such that the partial areas overlap each other to form an overlapping area, and administers a contrast agent to each of the partial areas to capture a plurality of time-series images. The calculator calculates, based on the transition of the pixel value in one of the time-series images having the overlapping area, the transition of the pixel value in the other time-series image having the overlapping area. The analyzer analyzes the time-series images based on the transition of the pixel value in the one and the other of the time-series images to obtain the hemodynamics of the subject.

Medical imaging analyzer and medical image processing method

An X-ray detection system has a detector and a data acquisition unit. The detector detects an X-ray passing through a body and producing an analog electric signal for each channel. The data acquisition unit includes a plurality of circuit blocks each including as many circuits as the number of channels assigned to each block. The data acquisition unit converts the analog electric signal into a digital signal for each channel and outputs the resultant digital signal. A phase control unit controls the phase of the circuit blocks such that the circuit blocks are grouped into a plurality of groups. The respective groups operate in synchronization with clock signals for the data acquisition unit. Phases of the clock signals are mutually different at least between two groups.

X-ray computed tomography scanner and x-ray detecting system

An X-ray computed tomography apparatus includes a cone beam X-ray tube, an X-ray detector, a rotating mechanism for supporting the X-ray tube and X-ray detector, a moving mechanism for moving the object in the slice direction, a control unit for controlling the rotating mechanism and moving mechanism to execute helical scan operation and move relative to the object, an input device for setting a substantially cylindrical reconstruction area, and an image reconstructing unit for reconstructing image data within the set reconstruction area based on the output of the detector. The apparatus also includes a movement distance determining unit for.determining the movement distance of the X-ray tube and X-ray detector relative to the object on the basis of the radius of the set reconstruction area as well as its height.

X-ray computed tomographic imaging apparatus

An X-ray computed tomography apparatus includes a cone beam X-ray tube, an X-ray detector, a rotating mechanism for supporting the X-ray tube and X-ray detector, a moving mechanism for moving the object in the slice direction, a control unit for controlling the rotating mechanism and moving mechanism to execute helical scan operation and move relative to the object, an input device for setting a substantially cylindrical reconstruction area, and an image reconstructing unit for reconstructing image data within the set reconstruction area based on the output of the detector. The apparatus also includes a movement distance determining unit for determining the movement distance of the X-ray tube and X-ray detector relative to the object on the basis of the radius of the set reconstruction area as well as its height.

There is disclosed an X-ray computerized tomography apparatus capable of accurately and promptly carrying out a navigation of an operation, by real-time reconstructing and displaying an image of a slice in which an object such as an insertion object inside a subject exists. This X-ray computerized tomography apparatus is structured to include: an X-ray detection unit for detecting transmission X-rays from a plurality of directions Irradiated from an X-ray beam generation source and transmitted through a subject, a data acquisition unit for acquiring transmission data according to the transmission X-rays detected by the X-ray detection unit, an object position detection unit for detecting a position of an object inside the subject, according to a part of the transmission data, a reconstructing range determining unit for determining a slice to be image-reconstructed, according to the position detected by the object position detection unit, and an image reconstruction unit for reconstructing a tomographic image of a slice in which the object exists, according to a transmission data acquired by the data acquisition unit, the transmission data being acquired in the slice. Thus, the X-ray computerized tomography apparatus directly detects the position of the object from the acquired transmission data, and controls the image reconstruction, display or scanning, based on the detected position.

X-ray computerized tomography apparatus

An X-ray CT apparatus comprises an X-ray tube for irradiating X-ray onto a target object, a xenon gas type detector for detecting the X-ray passing through the target object and for outputting an analog electric signal corresponding to an amount of the X-ray, a data acquisition system, a substrate for supporting the detector and the data acquisition system, which has a high rigidity and a surface where a wiring portion for transmitting an analog signal outputted from the detector to the data acquisition system is formed, and a rotation mechanism for rotating the X-ray source and the substrate for supporting the detector and the data acquisition system around the body axis of the target object as the rotation center.

X-ray detection apparatus

An X-ray CT system includes a fixed frame portion and a rotating frame portion. Being provided with X-ray tubes, the rotating frame portion is arranged so as to rotate with respect to the fixed frame portion. Vane members for feeding air are secured on the rotating frame portion. In operation, with the rotation of the vane members together with the rotating frame portion, cool air is introduced into the rotating frame portion. Consequently, heated instruments, such as the X-ray tubes, in the rotating frame can be cooled down effectively.

X-ray computerized tomography system having cooling features

A computerized tomography apparatus is disclosed which reconstructs a tomography image of data from multi-directional projection data in a period of time less than the time required for a scan operation for data acquisition and displays the tomography image after a lapse of a given period of time from the termination of the scan operation. This avoids the time interval between scan and image display becoming irregular. Accordingly, tomography images can be displayed successively like motion picture to observe the internal movements of a section of a human body under examination in real time.

Growing community of inventors

Nasushiobara, Japan

Naoki Sugihara