Provided is a radiation imaging system configured to synchronize radiation irradiation with operation of a radiation imaging apparatus. The radiation imaging system includes: an irradiation unit arranged to irradiate with radiation; a detection unit arranged to detect the radiation; a setting unit configured to set an irradiation time at which irradiation of the radiation is to be started; an irradiation control unit configured to control the irradiation unit so that radiation irradiation is executed at the irradiation time; and a detection control unit configured to control the detection unit so that the detection unit is ready to detect the radiation at the irradiation time.

Provided is a radiation imaging system configured to synchronize radiation irradiation with operation of a radiation imaging apparatus. The radiation imaging system includes: an irradiation unit arranged to irradiate with radiation; a detection unit arranged to detect the radiation; a setting unit configured to set an irradiation time at which irradiation of the radiation is to be started; an irradiation control unit configured to control the irradiation unit so that radiation irradiation is executed at the irradiation time; and a detection control unit configured to control the detection unit so that the detection unit is ready to detect the radiation at the irradiation time.

The present invention provides a technique advantageous in suitably determining the irradiation end timing in a radiation imaging apparatus that can perform AEC. The radiation imaging apparatus comprises a sensor configured to detect radiation and a control unit, wherein the control unit generates, after the start of radiation irradiation, an evaluation value indicating the stability of a radiation irradiation intensity based on a sensor signal from the sensor, and the control unit outputs, in response to the evaluation value satisfying a predetermined condition, a signal indicating that the radiation irradiation intensity has stabilized.

A reference image of a patient may be generated. A subsequent x-ray image of the patient may be generated after the generating of the reference image where the subsequent x-ray image is associated with a low dosage. A difference between the reference image and the subsequent x-ray image that is associated with the low dosage may be determined. A motion of the patient may be identified as having occurred based on the determined difference.

A reference image of a patient may be generated. A subsequent x-ray image of the patient may be generated after the generating of the reference image where the subsequent x-ray image is associated with a low dosage. A difference between the reference image and the subsequent x-ray image that is associated with the low dosage may be determined. A motion of the patient may be identified as having occurred based on the determined difference.

The present disclosure provides an automatic exposure control method, including: providing an object to be tested; providing an image sensor, including a photosensitive element array composed of a plurality of photosensitive elements arranged in an array, and the photosensitive element array includes at least a plurality of first photosensitive elements and a plurality of second photosensitive elements; turning on the radiation source, and the first readout signals on the first photosensitive elements are read after exposing the area to be tested for the first preset time; continuing the exposure for the second preset time, turning off the photosensitive elements and reading the second readout signals on the second photosensitive elements; acquiring the preset dose threshold of the area to be tested based on the second and first readout signals, and obtaining the remaining time to reach the preset radiation dose to control the exposure of the radiation source.

A timer circuit for an X-ray imaging system having an X-ray generator used to generate images of a patient. The circuit includes a current sensor connected between a main power system and a circuit interrupter, wherein the circuit interrupter is also connected to the X-ray generator. The circuit also includes a timing device coupled between the current sensor and a control computer. The timing device is triggered when a current level detected by the current sensor exceeds an idle current level wherein X-rays are not generated by the X-ray generator. The timing device then measures a time period that the idle current level is exceeded. When the measured time period exceeds a predetermined time period by 10%, the circuit interrupter is activated to turn off current flow to the X-ray generator.

A timer circuit for an X-ray imaging system having an X-ray generator used to generate images of a patient. The circuit includes a current sensor connected between a main power system and a circuit interrupter, wherein the circuit interrupter is also connected to the X-ray generator. The circuit also includes a timing device coupled between the current sensor and a control computer. The timing device is triggered when a current level detected by the current sensor exceeds an idle current level wherein X-rays are not generated by the X-ray generator. The timing device then measures a time period that the idle current level is exceeded. When the measured time period exceeds a predetermined time period by 10%, the circuit interrupter is activated to turn off current flow to the X-ray generator.

Provided is a radiation imaging system configured to synchronize radiation irradiation with operation of a radiation imaging apparatus. The radiation imaging system includes: an irradiation unit arranged to irradiate with radiation; a detection unit arranged to detect the radiation; a setting unit configured to set an irradiation time at which irradiation of the radiation is to be started; an irradiation control unit configured to control the irradiation unit so that radiation irradiation is executed at the irradiation time; and a detection control unit configured to control the detection unit so that the detection unit is ready to detect the radiation at the irradiation time.

Provided is a radiation imaging system configured to synchronize radiation irradiation with operation of a radiation imaging apparatus. The radiation imaging system includes: an irradiation unit arranged to irradiate with radiation; a detection unit arranged to detect the radiation; a setting unit configured to set an irradiation time at which irradiation of the radiation is to be started; an irradiation control unit configured to control the irradiation unit so that radiation irradiation is executed at the irradiation time; and a detection control unit configured to control the detection unit so that the detection unit is ready to detect the radiation at the irradiation time.