Radiographic imaging device and computer readable medium

• US 9,050,051 B2
• Filed: 04/10/2013
• Issued: 06/09/2015
• Est. Priority Date: 10/26/2010
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Nakatsugawa, Haruyasu, Ohta, Yasunori, Nishino, Naoyuki, Iwakiri, Naoto
• Primary Examiner(s): Gaworecki, Mark R
• Application Number:
  US13/859,763
• Publication Number:
  US 20140061496A1
• Time in Patent Office: 790 Days
• Field of Search: 250/366, 250/370.08, 250/370.09, 250/394, 378/62, 378/97
• US Class Current: 1/1
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4283 characterised by a detector unit being housed in a cassette
• CPC Class Codes: A61B 6/5205 involving processing of raw data to produce diagnostic data
• CPC Class Codes: A61B 6/542 involving control of exposure
• CPC Class Codes: A61B 6/548 Remote control of the apparatus or devices
• CPC Class Codes: A61B 6/563 involving image data transmission via a network
• CPC Class Codes: G01T 1/17 Circuit arrangements not adapted to a particular type of detector pulse-selection circuits H03K, G01R
• CPC Class Codes: G01T 1/24 with semiconductor detectors
• CPC Class Codes: G03B 42/04 Holders for X-ray films
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30

Abstract

There is provided a radiographic imaging device including: a radiation detector including plural radiographic image acquisition pixels that are arranged in a matrix in an imaging region for capturing a radiographic image and that acquire image information representing the radiographic image by converting applied radiation into electric charges and storing the electric charges and plural radiation detection pixels that are arranged in the imaging region, that have mutually different characteristics, and that detect the applied radiation by converting the applied radiation into electric charges and storing the electric charges; and a detecting unit that uses the radiation detection pixels selectively according to the characteristics to detect a state of application of the radiation.

Claims

1. A radiographic imaging device comprising:

a radiation detector comprising a plurality of pixels that are arranged in a matrix in an imaging region that comprises a plurality of radiographic image acquisition pixels for capturing a radiographic image and that acquire image information representing the radiographic image by converting applied radiation into electric charges and storing the electric charges, and a plurality of radiation detection pixels that have mutually different characteristics, and that detect the applied radiation by converting the applied radiation into electric charges and storing the electric charges; and

a detecting unit that uses the radiation detection pixels selectively according to the mutually different characteristics to detect a state of application of the radiation.

2. The radiographic imaging device according to claim 1, further comprising an acquiring unit that acquires an imaging condition for capturing the radiographic image, wherein the detecting unit uses the radiation detection pixels which have characteristics corresponding to the imaging condition acquired by the acquiring unit to detect the state of application of the radiation.

3. The radiographic imaging device according to claim 2, wherein the imaging condition is at least one of a part to be imaged, a region in which the part to be imaged is placed when capturing the radiographic image, whether the imaging is imaging to capture a moving image or a still image, or an applied dose of the radiation.

4. The radiographic imaging device according to claim 1, wherein the radiation detection pixels are arranged in different positions in the imaging region.

5. The radiographic imaging device according to claim 1, wherein

the state of application of the radiation is at least one of a start of application of the radiation, an end of application of the radiation, or an the applied dose of the radiation, and

the detecting unit selects the radiation detection pixels used in the detection of the state of application in accordance with the state of application of the radiation to be detected.

6. The radiographic imaging device according to claim 1, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to amplifiers that amplify, at mutually different gains, signals represented by the electric charges stored by the radiation detection pixels.

7. The radiographic imaging device according to claim 6, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to low-pass filters that perform low-pass filtering at mutually different low-pass filtering frequencies with respect to signals represented by the electric charges stored by the radiation detection pixels.

8. The radiographic imaging device according to claim 6, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to a synthesizing unit that synthesize mutually different numbers of signals represented by the electric charges stored by the radiation detection pixels.

9. The radiographic imaging device according to claim 1, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to low-pass filters that perform low-pass filtering at mutually different low-pass filtering frequencies with respect to signals represented by the electric charges stored by the radiation detection pixels.

10. The radiographic imaging device according to claim 1, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to a synthesizing unit that synthesize mutually different numbers of signals represented by the electric charges stored by the radiation detection pixels.

11. The radiographic imaging device according to claim 1, wherein the radiation detector further comprises dedicated lines for reading out the stored electric charges from the radiation detection pixels.

12. The radiographic imaging device according to claim 1, wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to amplifiers that amplify, at mutually different gains, signals represented by the electric charges stored by the radiation detection pixels,

wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to low-pass filters that perform low-pass filtering at mutually different low-pass filtering frequencies with respect to signals represented by the electric charges stored by the radiation detection pixels, and

wherein the mutually different characteristics are different because of the plurality of radiation detection pixels being connected to a synthesizing unit that synthesize mutually different numbers of signals represented by the electric charges stored by the radiation detection pixels.

13. A non-transitory computer readable medium storing a program executed by a radiographic imaging device comprising a radiation detector comprising a plurality of pixels that are arranged in a matrix in an imaging region which comprises a plurality of radiographic image acquisition pixels for capturing a radiographic image and that acquire image information representing the radiographic image by converting applied radiation into electric charges and storing the electric charges and a plurality of radiation detection pixels that have mutually different characteristics, and that detect the applied radiation by converting the applied radiation into electric charges and storing the electric charges, the program causing a computer to function as

an acquiring unit that acquires an imaging condition for capturing the radiographic image and

a detecting unit that uses the radiation detection pixels having characteristics corresponding to the imaging condition acquired by the acquiring unit to detect a state of application of the radiation.