X-ray detector and control method
An X-ray detector according to an embodiment is an X-ray detector of photon counting type including a plurality of detection elements and a voltage supply device configured to supply the detection elements with a voltage for reading out electric charges accumulated in the detection elements irradiated with X-rays, and the X-ray detector includes processing circuitry configured to: identify target elements from among the detection elements based on information that is acquired during a CT scan using the X-ray detector, each of the target elements causing a large current to flow through a circuit between the target element and the voltage supply device; and stop voltage supply from the voltage supply device to at least some of the target elements.
1 . An X-ray detector of photon counting type comprising a plurality of detection elements and a voltage supply device configured to supply the detection elements with a voltage for reading out electric charges accumulated in the detection elements irradiated with X-rays, the X-ray detector comprising:
processing circuitry configured to
identify target elements from among the detection elements of the X-ray detector based on information that is acquired during a CT scan using the X-ray detector, each of the target elements causing a large current to flow through a circuit between the target element and the voltage supply device, and
stop voltage supply from the voltage supply device to at least some of the target elements.
2 . The X-ray detector according to claim 1 , wherein the processing circuitry stops voltage supply from the voltage supply device to determined elements among the target elements.
3 . The X-ray detector according to claim 2 , wherein the determined elements are set at regular intervals with respect to the detection elements arranged on a detection face.
4 . The X-ray detector according to claim 1 , wherein the processing circuitry identifies the target element based on an incident dose to the detection element.
5 . The X-ray detector according to claim 1 , wherein the processing circuitry identifies the target element based on a measured value of a voltage supplied from the voltage supply device to the detection element.
6 . A control method for an X-ray detector of photon counting type comprising a plurality of detection elements and a voltage supply device configured to supply the detection elements with a voltage for reading out electric charges accumulated in the detection elements irradiated with X-rays, the control method comprising:
identifying target elements from among the detection elements of the X-ray detector based on information that is acquired during a CT scan using the X-ray detector, each of the target elements causing a large current to flow through a circuit between the target element and the voltage supply device, and
stopping voltage supply from the voltage supply device to at least some of the target elements.