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Proceedings Paper

Effect of noise levels of an edge image on determining the presampled modulation transfer function
Author(s): Wenbo Wan; Feng Gao; Huijuan Zhao; Lixin Zhang; Zhongxing Zhou
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Paper Abstract

The modulation transfer function (MTF) is widely used to describe the spatial resolution of x-ray imaging systems. Extensive works have been conducted to achieve accurate and precise measurement of MTF by using a slanted edge test device. The noise level of the slanted edge image is an important factor influencing the accuracy of MTF measurement. Thus in this work, a comparison study was made on the MTF measurement results obtained by using different curve fitting algorithms for ESF determination when analyzing the same image data with different noise levels. The results indicated that the averaged MTF measurement errors got increased with the decrease of the signal-to-noise ratio of the slanted edge images for all of the ESF processing algorithms. But for the same noisy slanted edge image, monotonic fitting algorithm outperformed Gaussian smoothing method or moving polynominal fitting method on MTF measurement.

Paper Details

Date Published: 4 March 2014
PDF: 7 pages
Proc. SPIE 8936, Design and Quality for Biomedical Technologies VII, 893613 (4 March 2014); doi: 10.1117/12.2038093
Show Author Affiliations
Wenbo Wan, Tianjin Univ. (China)
Feng Gao, Tianjin Univ. (China)
Tianjin Key Lab. of Biomedical Detecting Techniques and Instruments (China)
Huijuan Zhao, Tianjin Univ. (China)
Tianjin Key Lab. of Biomedical Detecting Techniques and Instruments (China)
Lixin Zhang, Tianjin Univ. (China)
Tianjin Key Lab. of Biomedical Detecting Techniques and Instruments (China)
Zhongxing Zhou, Tianjin Univ. (China)
Tianjin Key Lab. of Biomedical Detecting Techniques and Instruments (China)


Published in SPIE Proceedings Vol. 8936:
Design and Quality for Biomedical Technologies VII
Ramesh Raghavachari; Rongguang Liang, Editor(s)

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