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1. (WO2018003918) RADIOGRAPHIC IMAGING DEVICE, RADIOGRAPHIC IMAGING METHOD, AND RADIOGRAPHIC IMAGING PROGRAM

Pub. No.:    WO/2018/003918    International Application No.:    PCT/JP2017/023936
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Fri Jun 30 01:59:59 CEST 2017
IPC: A61B 6/03
G01T 1/17
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: TAKAHASHI, Isao
高橋 勲
KONNO, Yasutaka
昆野 康隆
WATANABE, Fumito
渡辺 史人
Title: RADIOGRAPHIC IMAGING DEVICE, RADIOGRAPHIC IMAGING METHOD, AND RADIOGRAPHIC IMAGING PROGRAM
Abstract:
The present invention improves image quality by reducing artifacts in a reconstructed image obtained as a result of estimating nonuniformity of an incident distribution in a detector so as to accurately estimate an amount of incident radiation. Provided is a radiographic imaging device that is provided with: an X-ray source that emits X-rays; a detection unit in which pixels, each comprising a plurality of sub-pixels for detecting X-rays, are arranged in a two-dimensional array; a signal processing unit which generates an output signal in accordance with the intensity of the X-rays on the basis of detection signals supplied from the sub-pixels; a signal addition unit which generates an X-ray count signal for each of the pixels by adding output signals of the sub-pixels belonging to the pixel; and an image generation unit which generates an image on the basis of the X-ray count signal, wherein the image generation unit is provided with a nonuniformity estimation unit which estimates nonuniformity of an incident X-ray distribution in a pixel subject to processing on the basis of the X-ray count signal of said pixel subject to processing and the X-ray count signal of a pixel located near the pixel subject to processing.