Imaging system, image processing method therefor, and program therefor

An image processing method for performing image processing on image data corresponding to irradiated radiation or light, the image data being output from a detector including a plurality of pixels each having a conversion element configured to convert radiation or light into electric charge, the image processing method comprising the steps of:

• measuring a first integral dose and a second integral dose, the first integral dose being an integral dose of radiation or light with which a first pixel included in a first area is irradiated, the first area being an area in the detector where the radiation or light is applied in a first radiation field, the second integral dose being an integral dose of radiation or light with which a second pixel included in a second area is irradiated, the second area being an area other than the first area in the detector where the radiation or light is irradiated in a second radiation field larger than the first radiation field;
• and
• when switching from the first radiation field to the second radiation field has occurred, correcting at least one of data of the first pixel and data of the second pixel within the image data, based on an integral dose of the radiation or light, dark output information that is obtained in advance and that is based on dark output characteristics of the pixels, and the measured first integral dose and second integral dose.

A non-transitory computer-readable medium having stored thereon a program for causing a computer to execute image processing on image data corresponding to irradiated radiation or light, the image data being output from a detector including a plurality of pixels each having a conversion element configured to convert radiation or light into electric charge, the program causing the computer to execute the steps of:

• measuring a first integral dose and a second integral dose, the first integral dose being an integral dose of radiation or light with which a first pixel included in a first area is irradiated, the first area being an area in the detector where the radiation or light is applied in a first radiation field, the second integral dose being an integral dose of radiation or light with which a second pixel included in a second area is irradiated, the second area being an area other than the first area in the detector where the radiation or light is irradiated in a second radiation field larger than the first radiation field;
• and
• when switching from the first radiation field to the second radiation field has occurred, correcting at least one of data of the first pixel and data of the second pixel within the image data, based on an integral dose of the radiation or light, dark output information that is obtained in advance and that is based on dark output characteristics of the pixels, and the measured first integral dose and second integral dose.