Radiographic system, drive control method for radiographic system, recording medium for drive control program and radiological image detection device
First Claim
1. A radiographic system comprising:
- a radiation source which irradiates a subject with X-ray radiation;
a control device which controls a start and stop of X-ray radiation irradiation by the radiation source;
a radiological image detection device having a detection panel in which pixels accumulating charge according to a reached radiation dose are arranged;
a radiation dose detection sensor which detects the reached radiation dose; and
an automatic exposure control unit including a comparison circuit which compares an integrated value of the reached radiation dose detected by the radiation dose detection sensor and a threshold value set beforehand, and determines whether the integrated value of the reached radiation dose reaches a target value based on the comparison result,wherein the comparison circuit continuously transmits an irradiation continuation signal which makes the radiation source continue radiation irradiation to the control device in a predetermined period until it is determined that the integrated value of the reached radiation dose reaches the target value from the start of the X-ray radiation irradiation by the radiation source, andthe control device stops the X-ray radiation irradiation when the irradiation continuation signal is not received.
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Accused Products
Abstract
It is possible to reliably avoid a problem that radiation irradiation does not stop even when an accumulated radiation dose reaches a target radiation dose. An AEC unit starts monitoring an integrated value of a radiation dose detection signal from a detection pixel and an output of an irradiation continuation signal at the same time, and continuously transmits the irradiation continuation signal in a predetermined period while the integrated value does not reach a threshold value. When the integrated value reaches the threshold value, the output of the irradiation continuation signal is stopped. The irradiation continuation signal is transmitted to an irradiation signal I/F of a radiation source control device through an irradiation signal I/F by wireless. The radiation source control device stops X-ray irradiation by an X-ray source when the irradiation signal I/F does not receive the irradiation continuation signal.
23 Citations
24 Claims
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1. A radiographic system comprising:
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a radiation source which irradiates a subject with X-ray radiation; a control device which controls a start and stop of X-ray radiation irradiation by the radiation source; a radiological image detection device having a detection panel in which pixels accumulating charge according to a reached radiation dose are arranged; a radiation dose detection sensor which detects the reached radiation dose; and an automatic exposure control unit including a comparison circuit which compares an integrated value of the reached radiation dose detected by the radiation dose detection sensor and a threshold value set beforehand, and determines whether the integrated value of the reached radiation dose reaches a target value based on the comparison result, wherein the comparison circuit continuously transmits an irradiation continuation signal which makes the radiation source continue radiation irradiation to the control device in a predetermined period until it is determined that the integrated value of the reached radiation dose reaches the target value from the start of the X-ray radiation irradiation by the radiation source, and the control device stops the X-ray radiation irradiation when the irradiation continuation signal is not received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A drive control method for a radiographic system including a radiation source which irradiates a subject with X-ray radiation, a control device which controls a start and stop of X-ray radiation irradiation by the radiation source, a radiological image detection device having a detection panel in which pixels accumulating charge according to a reached radiation dose are arranged, a radiation dose detection sensor which detects the reached radiation dose, and an automatic exposure control unit including a comparison circuit which compares an integrated value of the reached radiation dose detected by the radiation dose detection sensor and a threshold value set beforehand, and determines whether the integrated value of the reached radiation dose reaches a target value based on the comparison result, the method comprising:
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continuously transmitting, by said comparison circuit, an irradiation continuation signal which makes the radiation source continue X-ray radiation irradiation to the control device from the automatic exposure control unit in a predetermined period until it is determined that the integrated value of the reached radiation dose reaches the target value from the start of the X-ray radiation irradiation by the radiation source; and making the control device stop the X-ray radiation irradiation when the control device does not receive the irradiation continuation signal.
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23. A non-transitory computer readable recording medium recorded with a drive control program of a radiographic system including a radiation source which irradiates a subject with X-ray radiation, a control device which controls a start and stop of X-ray radiation irradiation by the radiation source, a radiological image detection device having a detection panel in which pixels accumulating charge according to a reached radiation dose are arranged, a radiation dose detection sensor which detects the reached radiation dose, and an automatic exposure control unit including a comparator which compares an integrated value of the reached radiation dose detected by the radiation dose detection sensor and a threshold value set beforehand, and determines whether the integrated value of the reached radiation dose reaches a target value based on the comparison result, the program causing a computer to execute functions of:
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continuously transmitting, by said comparator, an irradiation continuation signal which makes the radiation source continue X-ray radiation irradiation to the control device from the automatic exposure control unit in a predetermined period until it is determined that the integrated value of the reached radiation dose reaches the target value from the start of the X-ray radiation irradiation by the radiation source; and making the control device stop the X-ray radiation irradiation when the control device does not receive the irradiation continuation signal.
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24. A radiological image detection device having a detection panel in which pixels accumulating charge according to a reached radiation dose are arranged, the device comprising:
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an automatic exposure control unit including a comparison circuit which compares an integrated value of the reached radiation dose detected by a radiation dose detection sensor and a threshold value set beforehand, and determines whether the integrated value of the reached radiation dose reaches a target value based on the comparison result, wherein the automatic exposure control unit continuously transmits, by said comparison circuit, an irradiation continuation signal which makes a radiation source continue X-ray radiation irradiation to a control device that controls a start and stop of X-ray radiation irradiation by the radiation source in a predetermined period until it is determined that the integrated value of the reached radiation dose reaches the target value from the start of the X-ray radiation irradiation by the radiation source.
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Specification