Title :
A novel method for MTF measurement of digital radiographic systems
Author :
Zhou, Zhongxing ; Gao, Feng ; Zhao, Huijuan ; Zhang, Lixin ; Li, GuoHui
Author_Institution :
Sch. of Precision Instrum. & Optoelectron. Eng., Tianjin Univ., Tianjin, China
Abstract :
The exact determination of the modulation transfer function (MTF) of X-ray digital imaging system is a persistent problem. We present a practical method for measuring the MTF curve of X-ray linear flat panel detector. The method is based on the noise transfer theory of cascaded linear system. The scale factor between noise power spectrum (NPS) and MTF should be obtained firstly. Accurate NPS estimation of system noise (quantum noise and additive noise) by background trends removal and MTF values measurement by standard bar pattern method were required in this method.
Keywords :
X-ray detection; diagnostic radiography; medical image processing; quantum noise; X-ray digital imaging; X-ray linear flat panel detector; additive noise; cascaded linear system; digital radiographic systems; modulation transfer function measurement; noise power spectrum; noise transfer theory; quantum noise; Additive noise; Detectors; Linear systems; Radiography; Transfer functions; X-ray imaging; Modulation transfer function; cascased linear system; noise power spectrum; standard bar pattern;
Conference_Titel :
Biomedical Engineering and Informatics (BMEI), 2011 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-9351-7
DOI :
10.1109/BMEI.2011.6098284
