Radiation imaging apparatus, method for controlling the same, and radiation image detection device

A radiation image detection device used in combination with a radiation generating apparatus, for performing fluoroscopy, the radiation generating apparatus successively generating pulses of radiation to perform pulse irradiation, the radiation image detection device comprising:

• an image detector for detecting a radiation image of an object, the image detector having an image capture field in which pixels are arranged in a matrix, the each pixel storing a signal charge in accordance with a dose of the radiation;
• a radiation detector for detecting the radiation and outputting a detection signal in accordance with the dose;
• a controller for allowing the image detector to operate in one of a pulse irradiation mode and a successive irradiation mode, the controller detecting a rise and a fall of the pulse of the radiation based on the detection signal outputted from the radiation detector and determining start timing of a storage operation based on timing of detecting the rise and determining start timing of a readout operation based on timing of detecting the fall in the pulse irradiation mode, the signal charge being stored in the storage operation, the stored signal charge being read out in the readout operation, the storage operation and the readout operation being repeated alternately at predetermined time intervals without detection of the rise and the fall of the pulse of the radiation in the successive irradiation mode;
• a determination section for obtaining external information, which includes information related to the radiation generating apparatus and imaging conditions, and determining whether the image detector is allowed to be set to the pulse irradiation mode based on the obtained external information;
• and
• a mode setting section for setting the image detector to one of the pulse irradiation mode and the successive irradiation mode based on a result of determination of the determination section, the mode setting section setting the image detector to the pulse irradiation mode in a case where the image detector is allowed to be set to the pulse irradiation mode, the mode setting section setting the image detector to the successive irradiation mode in a case where the image detector is not allowed to be set to the pulse irradiation mode.

A method for controlling a radiation imaging apparatus used in combination with a radiation generating apparatus, for performing fluoroscopy, the radiation generating apparatus successively generating pulses of radiation to perform pulse irradiation, the radiation imaging apparatus comprising a radiation detector and an image detector for detecting a radiation image of an object, the image detector having pixels arranged in a matrix, the each pixel storing a signal charge in accordance with a dose of the radiation, the radiation detector detecting the radiation and outputting a detection signal in accordance with the dose;

• the method comprising the steps of:
• obtaining external information that includes information related to the radiation generating apparatus and imaging conditions;
• determining whether the image detector is allowed to be set to a pulse irradiation mode based on the external information, a rise and a fall of the pulse of the radiation being detected based on the detection signal outputted from the radiation detector and start timing of a storage operation for storing the signal charge being determined based on timing of detecting the rise and start timing of a readout operation for reading out the signal charge being determined based on timing of detecting the fall in the pulse irradiation mode;
• setting the image detector to the pulse irradiation mode in a case where the image detector is allowed to be set to the pulse irradiation mode, and setting the image detector to a successive irradiation mode in a case where the image detector is not allowed to be set to the pulse irradiation mode, the storage operation and the readout operation being repeated alternately at predetermined time intervals without detection of the rise and the fall of the pulse of the radiation in the successive irradiation mode;
• and
• controlling the image detector in one of the pulse irradiation mode and the successive irradiation mode to which the image detector is set.