Canon Kabushiki Kaisha

Mina Takeshima

Hiroto Ueno

Provided is a mechanism for enabling a radiation generation apparatus to accurately perform control processing to stop irradiation of radiation. The mechanism includes a dose calculation unit that calculates a cumulative dose of radiation detected by a sensor unit from start of imaging, a timer unit that measures an irradiation time for radiation from a predetermined timing, a threshold decision unit that sets an irradiation stop threshold based on the irradiation time, a control unit including a threshold determination unit that transmits an irradiation stop signal to stop irradiation of radiation to the radiation generation apparatus when the cumulative dose reaches the irradiation stop threshold, and a sensor unit that detects radiation from the radiation generation apparatus. When the dose calculation unit calculates the cumulative dose having reached a predetermined amount from start of imaging, the threshold determination unit causes the timer unit to start measurement of the irradiation time.

Radiation imaging apparatus, radiation imaging system, control method, and storage medium

A radiographic imaging system includes a radiation detector, a controller, and determining unit. The radiation detector detects radiation emitted from a radiation source. The controller is capable of selectively performing wired communication or wireless communication with the radiation detector and controls the radiation detector and the radiation source. The determining unit determines whether or not a delivered dose delivered to the radiation detector reaches a reference value, by using a predetermined determination criterion on the basis of the detection result from the radiation detector. The controller controls the radiation source on the basis of the determination result from the determining unit, and the determining unit switches the predetermined determination criterion in accordance with whether the selected communication is the wireless communication or the wired communication.

Radiographic imaging apparatus, control apparatus, radiographic imaging system, method of controlling radiographic imaging system

A radiation imaging apparatus that is operable in a plurality of imaging modes with different frame rates, and includes a radiation detection unit configured to obtain, based on a set imaging mode, a radiation image based on charges accumulated by radiation irradiation, includes: a collection control unit configured to set, based on a difference in frame rate in a combination of the set imaging mode and an imaging mode switched from the imaging mode, a collection time of an offset image for correcting an offset component of the radiation image; and an image obtainment unit configured to obtain the offset image based on the collection time.

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Yokohama, Japan

Mina Takeshima