Radiographing system, method of controlling automatic exposure in radiographing system, and radiological image detection device

摘要

A compensation circuit 76 of an AEC unit 67 of an electronic cassette 13 defines the detection signal of a detection pixel 65 of the electronic cassette 13 as a detection signal corresponding to the detection signal of an old AEC sensor 25. The compensation circuit 76 performs compensation so as to exclude the influence on the detection signal due to a difference in the configuration of an intermediate member disposed between an X-ray source 10 and an FPD 35 of the electronic cassette 13 when the detection pixel 65 is used as an AEC sensor instead of the old AEC sensor 25. The detection signal is transmitted from a detection signal I/F 80 to a detection signal I/F 26 of a source control device 11 as it is (instantaneous value) or as an accumulated value obtained using an integration circuit 77.

主权项

1. A radiographing system comprising:
a radiation source which irradiates radiation toward a subject; a source control device which controls a driving of the radiation source; a radiological image detection device which receives the radiation transmitted through the subject to detect a radiological image, and has an AEC sensor for detecting the dose of the radiation transmitted through the subject and after the accumulated value of the detected dose reaches an irradiation prohibition threshold value set in advance, performing automatic exposure control to prohibit the irradiation of the radiation; a compensation part for, in a state where the AEC sensor attached to the radiological image detection device is connected to the source control device and used instead of an old AEC sensor, defining the detection signal of the AEC sensor as a detection signal corresponding to the detection signal of the old AEC sensor so as to exclude the influence on a detection signal due to a difference in the configuration of an intermediate member disposed between the radiation source and the imaging plane of a detection panel of the radiological image detection device in the case of using the AEC sensor instead of the old AEC sensor; and a detection signal I/F which exchanges a detection signal or the accumulated value of the detection signal between the source control device and the radiological image detection device, further comprising: an accumulation part which accumulates the detection signal output from the compensation part, wherein the detection signal I/F exchanges the detection signal output from the compensation part without using the accumulation part when a function of accumulating the detection signal is provided in the source control device, and exchanges the accumulated value of the detection signal output from the accumulation part when the accumulation function is not provided.