Hitachi, Ltd.

Hitachi Medical Corporation

Atsuro Suzuki

Isao Takahashi

Yushi Tsubota

Wataru Takeuchi

Shinichi Kojima

Takafumi Ishitsu

Hironori Ueki

Yasutaka Konno

Fumito Watanabe

Kenichi Kawabata

Kazuhiro Yamanaka

Yuichiro Ueno

Takahide Terada

Keiji Kobashi

Wenjing Wu

Yuichi Morimoto

Provided herein is a phantom capable of mimicking both a dense breast and a fatty breast. A phantom for ultrasound measurement includes: a first member that mimics an object of interest for measurement; and a second member having provided therein the first member. The second member has the property to decrease its sound speed with a temperature increase brought by external temperature control. The sound speed of the second member at a predetermined temperature is equal to the sound speed of a third member surrounding the second member. The first member and the second member are immiscible with each other.

Phantom for ultrasound measurement, and ultrasound CT device

A unit () for generating count images for separate energy windows generates main measured count images and auxiliary measured count images on the basis of gamma ray () count information measured by a detector head (). A main measurement window direct ray count rate estimation unit () estimates a count rate for direct gamma rays in a main measurement energy window, doing so by subtracting a scattered gamma ray count rate for an auxiliary measurement energy window, which has been estimated from an auxiliary measured count image and detector response data by an auxiliary measurement window scattered ray count rate estimation unit (), from the main measured count image.

Gamma camera, spect device, pet device, and method for generating measured gamma ray images

When two detector panels are rotationally moved around the entire circumference of a region of interest and projection images of the region of interest are captured during the rotational movement, the respective detector panels are moved along the tangential direction of the rotational movement to a position where the union of the capturing ranges of the projection images captured by the respective detector panels covers the entire region of interest. The projection images captured by the respective detector panels are used to reconstruct a transaxial image of the region of interest.

Radiation image capturing device, radiation image capturing method, and nuclear medicine diagnosis apparatus

There is provided is a radiation image acquiring device which corrects a positional displacement between a collimator and a detector and obtains an image without artifacts. The device includes a detector () to measure a radiation; a collimator () including a through-hole () having one or more detectors () disposed therein and configured to limit an incident direction of the radiation; a positional displacement measuring unit configured to measure a positional displacement between the detector () and the collimator () by use of a profile of a radiation source measured by the detector () based on the radiation source disposed corresponding to a predetermined detector ().

Radiation image acquiring device

Scattered X-rays scattered by an object or a structure enter in a detector (a shift detector) for detecting the positional shift of an X-ray focal point and become a noise source, thereby deteriorating the positional shift detection precision. In particular, the estimation of the dose of scattered X-rays originating from the object is difficult prior to the measurement, and correction of the scattered X-rays is important in order to precisely calculate the positional shift of the X-ray focal point. In order to address this drawback, according to the present invention, a scattered X-ray detectoris provided which measures the dose of scattered rays entering in a shift detectorfor detecting the positional shift of an X-ray focal point, and has a function that the output by the shift detectoris corrected using the scattered ray dose measured by the scattered X-ray detector.

X-ray CT device

In a state where a subjectis not present, a pre-processing unitchanges the focal spot position that becomes the position of an X-ray tube, acquires the X-ray incidence rate of each detection module at each focal spot position, approximates the X-ray incidence rate of each detection module by the X-ray incidence rate of a module in which a reference detector is present, and stores the coefficient of an approximate polynomial in a storage unit. When a scanning of the subjectis performed, the X-ray incidence rate of each detection module is calculated using the X-ray incidence rate of the module in which the reference detector is present and the stored coefficient, and sensitivity correction data relating to each focal spot position is obtained using the calculated X-ray incidence rate when the scanning of the subject is performed.

Calibration system for focal spot shift in an X-ray CT device

Growing community of inventors

Tokyo, Japan

Atsuro Suzuki