X-ray detection plate and X-ray detector

An X-ray detection plate comprising:

• an insulating substrate;
• a plurality of charge storage elements formed on the insulating substrate;
• a plurality of first electrode films formed on the plurality of charge storage elements and electrically connected to the plurality of charge storage elements respectively;
• a charge transport layer formed on the first electrode films;
• an X-ray detection layer mainly consisting of amorphous selenium and formed in contact with the charge transport layer;
• a second electrode film formed on the X-ray detection layer;
• and
• a means for sequentially reading charge signals stored in the plurality of charge storage elements according to a time series, wherein the charge transport layer is a semi-insulating resistive element having specific resistance between 106 Ωcm and 1012 Ωcm inclusive.

An X-ray detector having an X-ray detection plate, a power supply and an X-ray irradiator, wherein the power supply supplies a voltage to the X-ray detection plate and the X-ray irradiator is caused to emit an X-ray such that the X-ray detection plate is irradiated with the X-ray which has been transmitted by an object to be measured to form an image on the X-ray detection plate, the X-ray detection comprising:

• an insulating substrate;
• a first electrode film formed on the substrate;
• a charge transport layer formed on the first electrode film;
• an X-ray detection layer mainly consisted of amorphous selenium and formed in contact with the charge transport layer;
• and
• a second electrode film formed on the X-ray detection layer, wherein the charge transport layer is a semi-insulating resistive element having specific resistance between 106 Ωcm and 1012 Ωcm inclusive, the junction between the charge transport layer and the X-ray detection layer having characteristics of a diode whose cathode is the charge transport layer side and whose anode is the X-ray detection layer side, and the power supply applying a voltage to the second electrode film during the irradiation with the X-ray, the voltage being lower than the voltage applied to the first electrode film.

An X-ray detector having an X-ray detection plate, a power supply and an X-ray irradiator, wherein the X-ray irradiator is caused to emit an X-ray such that the x-ray detection plate is irradiated with the x-ray which has been transmitted by an object to be measured to form an image on the X-ray detection plate while a voltage is applied to the X-ray detection plate by the power supply, the X-ray detection plate comprising:

• an insulating substrate;
• a plurality of charge storage elements formed on the insulating substrate;
• a plurality of first electrode films formed on the plurality of charge storage elements and electrically connected to the plurality of charge storage elements respectively;
• a charge transport layer formed on the first electrode films;
• an X-ray detection layer mainly consisted of amorphous selenium and formed in contact with the charge transport layer;
• a second electrode film formed on the X-ray detection layer;
• and
• a means for sequentially reading charge signals stored in the plurality of charge storage elements according to a time series wherein the charge transport layer is a semi-insulating resistive element having specific resistance between 106 Ωcm and 1012 Ωcm inclusive, and the power supply applying a voltage to the second electrode film during the irradiation with the X-ray, the voltage being lower than the voltage applied to the first electrode films.