Radiation imaging apparatus, drive method and program of the radiation imaging apparatus

A driving method of a radiation imaging apparatus comprising a conversion unit including a plurality of pixels arranged two dimensionally, wherein each of the pixels includes a conversion element for converting incident radiation into an electric charge and a switch element for transferring an electric signal based on the electric charge, a drive circuit unit for outputting, to the switching element, a drive signal having a voltage for turning on the switching element, and a read-out circuit unit for reading out the electric signal from the pixel, the method comprising:

• a calculating step of calculating an S/N ratio of the electric signal read out by the read-out circuit unit;
• and
• a determining step of determining the voltage of the drive signal outputted from the drive circuit unit according to the S/N ratio calculated.

A storage medium storing a program for operating a computer to execute steps of driving a radiation imaging apparatus comprising a conversion unit including a plurality of pixels arranged two dimensionally, wherein each of the pixels includes a conversion element for converting incident radiation into an electric charge and a switch element for transferring an electric signal based on the electric charge, a drive circuit unit for outputting, to the switching element, a drive signal having a voltage for turning on the switching element, and a read-out circuit unit for reading out the electric signal from the pixel, the steps comprising:

• a calculating step of calculating an S/N ratio of the electric signal read out by the read-out circuit unit;
• and
• a determining step of determining the voltage of the drive signal outputted from the drive circuit unit according to the S/N ratio calculated.