Kabushiki Kaisha Toshiba

Toshiba Medical Systems Corporation

Canon Medical Systems Corporation

Tetsuya Sadotomo

Makoto Nakano

Katsumi Gotanda

Yasutaka Shindo

Tomokazu Harada

Manabu Teshigawara

Tomonao Takamatsu

Yasuhiro Noshi

Hideo Iwasaki

Hitoshi Hattori

Satoshi Ota

Masahiro Kazama

Harunobu Fukushima

Rika Hosaka

Tomohiko Jimbo

According to one embodiment, a nuclear medical diagnostic apparatus includes processing circuitry. The processing circuitry acquires gamma-ray emission data based on gamma rays emitted from radio isotopes administered to an object. The processing circuitry further executes scattered-ray correction on the gamma-ray emission data based on a second X-ray CT image obtained by replacing pixel values of a non-object region included in a first X-ray CT image with a predetermined pixel value.

Nuclear medical diagnostic apparatus and image processing method

A rotor is rotatably supported in a gantry housing having a substantially sealed structure. An X-ray tube is provided in the rotor. A cooler is provided in the rotor and cools a refrigerant within the X-ray tube. An X-ray detector is provided in the rotor. A reconstruction unit reconstructs an image on the basis of an output of the X-ray detector. A radiator is fixed inside the gantry housing at a position opposite to an exhaust opening of the cooler when the rotor is stationary.

X-ray computed tomographic apparatus

An X-ray CT apparatus that achieves a higher quality of reconstructed CT images by preventing displacements of relative positions of the X-ray tube and the X-ray detector from occurring, including a front side rotation frame configured to mount at least one X-ray tube and at least one X-ray detector facing the X-ray tube, and a rear side rotation frame configured to mount rotation units other than the X-ray tube and the X-ray detector in order to access both sides of the gantry.

X-ray CT apparatus

An X-ray CT apparatus, wherein a drum type rotation frame is rotatably supported by a fixed circular frame so as to surround an outer surface of the drum type rotation frame through a plurality of bearings provided between an inner surface of the fixing circular frame and an outer surface of the drum type rotation frame, for example in ring-like configuration. When the drum type rotation frame receives a large centrifugal acceleration due to a high speed rotation, outside expansion of the drum type rotation frame can be constrained due to both the rigidity of the fixed frame and the rigidity of the plurality of bearings provided on the outer surface of the rotation frame, thereby to maintain the relative positions of the X-ray tube and the X-ray detector and prevent deterioration of reconstructed images.

An X-ray computed tomographic apparatus includes a cylindrical rotary base supported so as to be rotatable about a rotational axis, an X-ray tube unit mounted on the rotary base, an X-ray detecting unit mounted on the rotary base, and a reinforcing ring fixed to an end of the rotary base, and having a greater rigidity than the rotary base.

Growing community of inventors

Otawara, Japan

Tetsuya Sadotomo