336 401

Cited 0 times in

Measurements of X-ray imaging performance of granular phosphors with direct-coupled CMOS sensors

Authors
 Min Kook Cho  ;  Ho Kyung Kim  ;  Thorsten Graeve  ;  Seung Man Yun  ;  Chang Hwy Lim  ;  Hyosung Cho  ;  Jung-Min Kim 
Citation
 IEEE TRANSACTIONS ON NUCLEAR SCIENCE, Vol.55(3) : 1338-1343, 2008 
Journal Title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
ISSN
 0018-9499 
Issue Date
2008
Keywords
Detective quantum efficiency ; digital radiography ; granular phosphor ; modulation-transfer function ; noise-power spectrum
Abstract
For Gd2O2S:Tb granular phosphor screens having a wide range of mass thicknesses, we have investigated the fundamental imaging performance in terms of modulation-transfer function (MTF), noise-power spectrum (NPS) and detective quantum efficiency (DQE). As an optical photon readout device, a CMOS photodiode array with a pitch of 48 mum was used. Under the representative radiation quality, RQA 5, recommended by the IEC (International Electrotechnical Commission, Report 1267), the MTF was measured using a slanted-slit method to avoid aliasing and the NPS was determined by two-dimensional (2D) Fourier analysis of white images. The DQE was assessed from the measured MTF, NPS and the estimated photon fluence. Figure-of-merit (FOM) curves are presented to describe the tradeoff between the X-ray sensitivity and spatial resolution of screens as a function of mass thickness. This study will be useful for the selection guidance of Gd2O2S:Tb phosphors for the relevant imaging tasks of digital radiography
Files in This Item:
T200804827.pdf Download
Appears in Collections:
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
Yonsei Authors
Kim, Jung Min(김정민)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/108313
사서에게 알리기
  feedback

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse

Links