Evaluation of dose-image-quality optimization in digital chest radiography

被引：4

作者：

Lee, S. C.

Wang, J. N.

Liu, S. C.

Jiang, S. H. ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Engn Syst Sci, Hsinchu 300, Taiwan

[2] Chinmin Inst Technol, Dept Elect Engn, Maioli, Taiwan

[3] Hsinchu Mackay Mem Hosp, Dept Radiol, Hsinchu 300, Taiwan

[4] Inst Nucl Energy Res, Tao Yuan 325, Taiwan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 580卷 / 01期

关键词：

dose-image-quality optimization; digital radiography system; geometric chest phantom; SNR; FOM;

D O I：

10.1016/j.nima.2007.05.226

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this study, we aimed to evaluate the operation conditions and reduce patient doses while maintaining acceptable image quality in digital chest radiography. A geometric chest phantom with built-in regional test objects for quantitative assessment of image quality was used to produce images that simulate a chest projection. Images of the chest phantom were obtained using a GE Revolution XR/d digital X-ray system operated at tube potentials from 62 to 132 kVp with the grid and a distance of 180 cm between the source and image system. The X-ray images were obtained with the automatic exposure control (AEC) mode. Raw data of the acquired images were used for image-quality analysis. The signal-to-noise ratio (SNR) was used as an image-quality indicator and a figure of merit (FOM) computed by dividing the SNR 2 by the effective dose was used to estimate the optimization of the chest radiography. The routine operation tube potential of 112 kVp seems optimal for subdiaphragni examinations but not for lung and heart examinations. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：544 / 547

页数：4

共 5 条

[1] Quality control phantom for digital chest radiography [J].