Radiation imaging apparatus and control method thereof, and radiation imaging system

Patent metadata

Field	Value
Publication number	US-8971494-B2
Application number	US-201213676255-A
Country	US
Kind code	B2
Filing date	Nov 14, 2012
Priority date	Nov 15, 2011
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

Besides normal pixels, a plurality detection pixels are arranged in an imaging surface of an FPD. In preliminary imaging, X-rays are emitted to an imaged body portion of a patient. The detection pixels receive the X-rays passed through the body portion, and output AEC detection signals. If an integral value of the AEC detection signals has reached a threshold value, X-ray emission is stopped and the preliminary imaging is completed. A main exposure condition determination unit determines a main irradiation time, being an irradiation time with the X-rays during the main imaging, based on an irradiation time with the X-rays during the preliminary imaging and the integral value of the AEC detection signals. The main imaging is performed using the main irradiation time. The normal pixels continue a charge accumulation operation over the preliminary imaging and the main imaging to produce an X-ray image for use in diagnosis.

First claim

What is claimed is:

1. A radiation imaging apparatus that performs main imaging for taking a radiographic image for use in diagnosis and preliminary imaging prior to said main imaging for determining a main exposure condition being an exposure condition used in said main imaging, said radiation imaging apparatus comprising:
a radiation image detecting device having a detection panel having an arrangement of a plurality of pixels each for receiving radiation emitted from a radiatio…

Assignees

• Fujifilm Corp

Inventors

• Tajima Takashi

Classifications

• A61B6/4283

  Human Necessities · mapped topic

• A61B6/4233

  Human Necessities · mapped topic

• A61B6/548

  Human Necessities · mapped topic

• A61B6/542 Primary

  Human Necessities · mapped topic