Nemoto Kyorindo Co., Ltd.

Other

Hiroshima University

Atsushi Hatcho

Hatcho, Atsushi

Kazumasa Masuda

Shigeru Nemoto

Kazuo Awai

Toru Higaki

Koji Yuba

Yuko Nakamura

Masayuki Dembo

Wataru Uda

Arashi Haishima

The simulator includes a chemical liquid information acquisition section configured to acquire an amount of contrast medium, a target value acquisition section configured to acquire a target duration for which a target pixel value is maintained, a protocol acquisition section configured to acquire a contrast medium injection protocol, and a prediction section for determining a predicted duration, the prediction section configured to simulate the time-dependent change in the pixel value in the tissue of the subject based on the injection protocol and the amount of the contrast medium, and the prediction section compares the predicted duration with the target duration to re-simulate, in a case where the predicted duration is shorter than the target duration, the time-dependent change in a condition where a greater amount of the contrast medium than the amount of the contrast medium used in the simulation is injected to redetermine the predicted duration, and in a case where the predicted duration is longer than the target duration, the time-dependent change in a condition where a smaller amount of the contrast medium than the amount of the contrast medium used in the simulation is injected to redetermine the predicted duration.

Simulator, injection device or imaging system provided with simulator, and simulation program

A blood vessel extraction apparatus including a convolutional neural network including a convolution unit which has a first path to which data for a first target region including some target voxels in medical volume data is input at a first resolution, and a second path to which data for a second target region including some target voxels in the medical volume data is input at a second resolution; and an output unit having a neural net structure which outputs numerical values related to visualization of the target voxels with an output result of the first path and the second path as input data.

Blood vessel extraction device and blood vessel extraction method

When imaging an imaging subject, a pixel value is maintained in a state of small fluctuation of the pixel value over an entire expected duration. A generation device includes: an imaging information acquiring unit acquiring information of an imaging site of an imaging subject; a subject information acquiring unit acquiring information of the imaging subject; and a protocol generation unit generating an injection protocol for a contrast medium based on the information of the imaging site and the information of the imaging subject, wherein the protocol generation unit generates the injection protocol including a first phase in which an injection rate decreases with a first acceleration, and a second phase which follows the first phase and in which the injection rate decreases with a second acceleration, and the injection rate at a start of the second phase is higher than the injection rate at an end of the first phase.

Injection protocol generation device, injection apparatus and imaging system including generation device, injection protocol generation method and injection protocol generation program

In order to achieve a prediction approximating an actual change with time of a pixel value in a tissue with higher accuracy, provided is a simulator, which is configured to predict a change with time of a pixel value in a tissue of an object, including: an object information acquisition unit configured to acquire information on the object; a protocol acquisition unit configured to acquire an injection protocol for a contrast medium; a tissue information acquisition unit configured to acquire information on the tissue; and a prediction unit configured to predict, based on the information on the object, the injection protocol, and the information on the tissue, a change with time of a pixel value of each of a plurality of compartments obtained by dividing the tissue along a blood flow direction.

A liquid injector registers the data of a variable pattern in which an injection rate of a contrast medium varies with time. The injection rate of the contrast medium varies with time according to the variable pattern for maintaining a state in which the image contrast achieved by the contrast medium approximates an optimum level.

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Tokyo, Japan

Kazumasa Masuda