Title:
RADIOGRAPHY DEVICE, RADIOGRAPHY SYSTEM, AND RADIOGRAPHY METHOD
Document Type and Number:
WIPO Patent Application WO/2013/065515
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain a radiographic image with a high picture quality without any overflow or underflow even when a small dose is used. This radiography device is equipped with: an FPD (13) that has multiple pixels (PX) for storing signal charges according to the amounts of incident X-rays, and is capable of non-destructively reading data on an X-ray image that is generated on the basis of the amounts of the stored signal charges; a gain-adjustable amplifier (72) that amplifies signals from the FPD (13); an evaluation value calculation unit (76) that obtains an evaluation value, which is used for evaluating the X-ray image, on the basis of pixel values in all regions of the read X-ray image, and determines whether or not the X-ray image needs to be reread on the basis of the evaluation value; and a gain adjustment unit (77) that calculates, on the basis of the evaluation value, a new gain to be used for rereading by the amplifier (72) when the evaluation value calculation unit (76) determines that rereading is necessary. The radiography device changes the gain of the amplifier (72) to the new gain value, which has been calculated by the gain adjustment unit (77), when rereading the X-ray image.
Inventors:
NISHINO NAOYUKI (JP)
IWAKIRI NAOTO (JP)
KOBAYASHI TAKEYASU (JP)
IWAKIRI NAOTO (JP)
KOBAYASHI TAKEYASU (JP)
Application Number:
PCT/JP2012/077268
Publication Date:
May 10, 2013
Filing Date:
October 22, 2012
Export Citation:
Assignee:
FUJIFILM CORP (JP)
NISHINO NAOYUKI (JP)
IWAKIRI NAOTO (JP)
KOBAYASHI TAKEYASU (JP)
NISHINO NAOYUKI (JP)
IWAKIRI NAOTO (JP)
KOBAYASHI TAKEYASU (JP)
International Classes:
H04N5/32; A61B6/00; G01T7/00; G03B42/04; H04N5/355
Foreign References:
| JP2005143802A | 2005-06-09 | |||
| JP2009219538A | 2009-10-01 | |||
| JP2007502061A | 2007-02-01 | |||
| JPH11316832A | 1999-11-16 | |||
| JP2002159477A | 2002-06-04 | |||
| JPH02108176A | 1990-04-20 | |||
| JP2002223386A | 2002-08-09 | |||
| JPH01229212A | 1989-09-12 |
Attorney, Agent or Firm:
ODAHARA Shuichi et al. (JP)
Shuichi Odawara (JP)
Shuichi Odawara (JP)
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Claims: