Radiation signal processing device, radiation imaging system, and radiation signal processing method

Patent metadata

Field	Value
Publication number	US-9674935-B2
Application number	US-201514692746-A
Country	US
Kind code	B2
Filing date	Apr 22, 2015
Priority date	Nov 2, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A radiation signal processing device including: a reception section that receives as a digital signal a signal representing a detection result from a radiation imaging device that captures an image according to irradiated radiation, and that detects a radiation irradiation amount and outputs the signal representing the detection result; and a conversion section that converts the digital signal representing the detection result received by the reception section into an analog signal recognizable by a radiation irradiation device that irradiates radiation onto the radiation imaging device and stops radiation irradiation in cases in which radiation has reached a specific irradiation amount.

First claim

The invention claimed is:

1. A radiation signal processing device, comprising:
a reception section that captures an image according to irradiated radiation, detects a radiation irradiation amount, and receives, via wireless communication, a digital signal representing an irradiation termination advance notice signal of the radiation as a detection result of detecting the radiation irradiation amount; and
a conversion section that converts the digital signal representing the detection result received by the reception section into an analogue signal recognizable by a radiation irradiation device that irradiates radiation at the radiation imaging device and terminates radiation irradiation in cases in which radiation has reached a specific irradiation amount.

2. The radiation signal processing device of claim 1 , wherein:
the conversion section further outputs the analogue signal to the radiation irradiation device, with which the conversion section has a wired connection.

3. The radiation signal processing device of claim 1 , wherein the irradiation termination advance notice signal is a signal representing an irradiation duration from radiation irradiation initiation and a remaining irradiation duration with respect to a predetermined appropriate irradiation duration.

4. The radiation signal processing device of claim 3 , wherein the conversion section effects conversion to an analogue signal representing a voltage corresponding to a radiation irradiation amount by deriving a voltage increase per unit of time from the digital signal and by integrating with respect to time.

5. The radiation signal processing device of claim 4 , wherein the conversion section derives the voltage increase per unit of time based on the digital signal that is most recent.

6. The radiation signal processing device of claim 4 , wherein, in cases in which a dose becomes large and immediate termination is to be performed, the radiation imaging device transmits, as the digital signal, the irradiation termination advance notice signal with the voltage increase at a maximum.

7. The radiation signal processing device of claim 1 , wherein the irradiation termination advance notice signal is a signal representing an irradiation duration from radiation irradiation initiation, a remaining irradiation duration with respect to a predetermined appropriate irradiation duration, and a unit of time.

8. A radiation imaging system comprising:
a radiation imaging device that includes a function of detecting and outputting a dose of irradiated radiation, and that performs imaging of a radiation image; and
the radiation signal processing device of claim 1 .

9. A radiation signal processing method, comprising:
(a) by a reception section, capturing an image according to irradiated radiation, detecting a radiation irradiation amount, and receiving, via wireless communication, a digital signal representing an irradiation termination advance notice signal of the radiation as a detection result of detecting the radiation irradiation amount; and
(b) by a conversion section, converting the digital signal representing the detection result received at (a) into an analogue signal recognizable by a radiation irradiation device that irradiates radiation at the radiation imaging device and terminates radiation irradiation in cases in which radiation has reached a specific irradiation amount.

10. The radiation signal processing method of claim 9 , wherein:
at (b), the analogue signal is further output to the radiation irradiation device, with which the conversion section has a wired connection.

11. The radiation signal processing method of claim 9 , wherein at (a), the irradiation termination advance notice signal represents an irradiation duration from radiation irradiation initiation and a remaining irradiation duration with respect to a predetermined appropriate irradiation duration.

12. The radiation signal processing method of claim 11 , wherein at (b), conversion is made to an analogue signal representing a voltage corresponding to a radiation irradiation amount by deriving a voltage increase per unit of time from the detection result and by integrating with respect to time.

13. The radiation signal processing method of claim 12 , wherein the conversion section derives the voltage increase per unit of time based on the digital signal that is most recent.

14. The radiation signal processing method of claim 12 , wherein in cases in which a dose becomes large and immediate termination is to be performed, the irradiation termination advance notice signal, with the voltage increase at a maximum, is transmitted as the digital signal.

15. The radiation signal processing method of claim 9 , wherein at (a), the irradiation termination advance notice signal represents an irradiation duration from radiation irradiation initiation, a remaining irradiation duration with respect to a predetermined appropriate irradiation duration, and a unit of time.

16. A non-transitory computer readable recording medium storing a program that is executable to cause a computer to perform radiation signal processing, the radiation signal processing comprising:
(a) capturing an image according to irradiated radiation, detecting a radiation irradiation amount, and receiving, via wireless communication, a digital signal representing an irradiation termination advance notice signal of the radiation as a detection result of detecting the radiation irradiation amount; and
(b) converting the digital signal representing the detection result received at (a) into an analogue signal recognizable by a radiation irradiation device that irradiates radiation at the radiation imaging device and terminates radiation irradiation in cases in which radiation has reached a specific irradiation amount.

Assignees

• Fujifilm Corp

Inventors

• Kuwabara Takeshi
• Sato Masaru

Classifications

• A61B6/542

  involving control of exposure · CPC title

• A61B6/4233 Primary

  using matrix detectors · CPC title

• H05G1/44 Primary

  in which the switching instant is determined by measuring the amount of radiation directly {(dosimetry in general G01T1/02)} · CPC title