Radiation imaging apparatus, method for controlling the same, and radiation image detection device
First Claim
1. An X-ray radiation imaging apparatus used in combination with an X-ray radiation generating apparatus, for performing fluoroscopy, the X-ray radiation generating apparatus successively generating pulses of X-ray radiation to perform pulse irradiation, the X-ray radiation imaging apparatus comprising:
- an image detector for detecting an X-ray radiation image of an object, the image detector having an image capture field in which pixels are arranged in a matrix, each pixel storing a signal charge in accordance with a dose of the X-ray radiation;
an X-ray radiation detector for detecting the X-ray 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 X-ray radiation based on the detection signal outputted from the X-ray 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 X-ray radiation in the successive irradiation mode;
a determination section for obtaining external information, which includes information related to the X-ray 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.
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Accused Products
Abstract
A determination section of an FPD checks external information against a determination table and determines whether detection of a rise of X-ray pulses is allowed based on an output voltage from a short-circuited pixel. The FPD detects X-ray images. The external information is transmitted from an imaging control device. The X-ray pulses are sequentially generated by an X-ray generating apparatus. A controller selects a pulse irradiation mode in a case where the detection of the rise of the X-ray pulse is allowed. If not, a successive irradiation mode is selected. In the pulse irradiation mode, the rise and the fall of the X-ray pulse are detected and timing of storage operation is synchronized with the detected timing of the rise. In the successive irradiation mode, the storage operation is performed at predetermined time intervals without the detection of the rise and the fall of the X-ray pulse.
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Citations
19 Claims
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1. An X-ray radiation imaging apparatus used in combination with an X-ray radiation generating apparatus, for performing fluoroscopy, the X-ray radiation generating apparatus successively generating pulses of X-ray radiation to perform pulse irradiation, the X-ray radiation imaging apparatus comprising:
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an image detector for detecting an X-ray radiation image of an object, the image detector having an image capture field in which pixels are arranged in a matrix, each pixel storing a signal charge in accordance with a dose of the X-ray radiation; an X-ray radiation detector for detecting the X-ray 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 X-ray radiation based on the detection signal outputted from the X-ray 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 X-ray radiation in the successive irradiation mode; a determination section for obtaining external information, which includes information related to the X-ray 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An X-ray radiation image detection device used in combination with an X-ray radiation generating apparatus, for performing fluoroscopy, the X-ray radiation generating apparatus successively generating pulses of X-ray radiation to perform pulse irradiation, the X-ray radiation image detection device comprising:
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an image detector for detecting an X-ray radiation image of an object, the image detector having an image capture field in which pixels are arranged in a matrix, each pixel storing a signal charge in accordance with a dose of the X-ray radiation; an X-ray radiation detector for detecting the X-ray 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 X-ray radiation based on the detection signal outputted from the X-ray 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 X-ray radiation in the successive irradiation mode; a determination section for obtaining external information, which includes information related to the X-ray 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.
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19. A method for controlling an X-ray radiation imaging apparatus used in combination with an X-ray radiation generating apparatus, for performing fluoroscopy, the X-ray radiation generating apparatus successively generating pulses of X-ray radiation to perform pulse irradiation, the X-ray radiation imaging apparatus comprising an X-ray radiation detector and an image detector for detecting an X-ray radiation image of an object, the image detector having pixels arranged in a matrix, each pixel storing a signal charge in accordance with a dose of the X-ray radiation, the X-ray radiation detector detecting the X-ray 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 X-ray 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 X-ray radiation being detected based on the detection signal outputted from the X-ray 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 X-ray 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.
- the method comprising the steps of;
Specification