Radiation image capturing apparatus

A radiation image capturing apparatus that generates a plurality of frame images by consecutively repeating generation of electric charge in a radiation detecting device and reading of image data using a data reading part, the radiation image capturing apparatus comprising:

• a plurality of radiation detecting devices that are arranged on a substrate to be distributed in a two-dimensional shape and can generate electric charge by receiving radiation;
• a voltage applying part that applies a reverse bias voltage to each of the plurality of radiation detecting devices;
• the data reading part that reads image data on the basis of electric charge generated by each of the plurality of radiation detecting devices;
• and
• a noise detector that detects a voltage noise of the reverse bias voltage and outputs data on the basis of the voltage noise in accordance with the reading of the image data,
• wherein the data reading part includes:
• an estimator that estimates an offset component of the noise detector on the basis of data corresponding to a prior frame image output by the noise detector in accordance with reading of image data of the prior frame image of one frame image among the plurality of frame images;
• a noise data calculator that calculates noise data on the basis of the data output by the noise detector in accordance with the reading of the image data of the one frame image and the offset component of the noise detector estimated by the estimator on the basis of the data corresponding to the prior frame image output by the noise detector in accordance with the reading of the image data of the prior frame image;
• an image correcting part that generates image data after correction by eliminating the noise data calculated by the noise data calculator in accordance with the reading of image data of the one frame image from the image data of the one frame image;
• and
• a hardware processor including:
• an offset variation amount calculator that calculates an offset variation amount of the noise detector caused by horizontal crosstalk of the data output by the noise detector by multiplying a sum or an average value of image data of the radiation detecting devices corresponding to each scanning line read by reading circuits of reading ICs by a predetermined coefficient;
• and
• a data correcting part that corrects a plurality of pieces of data corresponding to each scanning line output by the noise detector on the basis of the offset variation amount of the noise detector calculated by the offset variation amount calculator.