Title:
放射線画像検出装置および放射線の照射開始検出方法
Document Type and Number:
Japanese Patent JP5660871
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reliably prevent erroneous detection of start of radiation irradiation without forcing a subject to be unnecessarily exposed to radiation.SOLUTION: The irradiation detecting section 53 has a first comparing circuit 61, a second comparing circuit 62 and a determining circuit 63. The first comparing circuit 61 compares a voltage signal Dave which has been offset with a first threshold value Dref. The second comparing circuit 62 compares the voltage signal Dave to a second threshold value Dref'. The second threshold value Dref' is obtained by superimposing a noise component Δ generated by transmitting receiving operations of a communication section 34 on the first threshold value Dref. A control circuit 41 switches switching elements 64, 65 to the first comparing circuit 61, if the communication section 34 does not perform the transmitting receiving operations, and to the second comparing circuit 62, if the transmitting receiving operations are performed. The determining circuit 63 monitors voltage values of output terminals of the respective comparing circuits 61, 62 and determines whether or not the irradiation of X-ray is started. When the determining circuit 63 determines that X-ray irradiation is started, the control circuit 41 immediately allows an FPD 36 to shift to an accumulating operation.
Inventors:
渡邊 敬太
野間 健太郎
野間 健太郎
Application Number:
JP2010265117A
Publication Date:
January 28, 2015
Filing Date:
November 29, 2010
Export Citation:
Assignee:
富士フイルム株式会社
International Classes:
G01T1/17; A61B6/00; G01T7/00; G03B42/04
Attorney, Agent or Firm:
Kazunori Kobayashi