Physics

Data on physics described by researchers at Yonsei University

  2010 MAR 23 - (VerticalNews.com) -- According to a study from South Korea, "The evaluation of image quality is all important; part, of digital radiography. The modulation transfer function (MTF), the noise power spectrum (NPS), and the detective quantum efficiency (DQE) are widely accepted measurements of the digital radiographic system performance."

  "However, 9 the methodologies for such characterization have not been standardized, it is difficult to compare directly reported the MTF, NPS, and DQE results. In this study, we evaluated the effect of an image processing algorithm for estimating the MTF, NPS, and DQE. The image performance parameters were evaluated using the international electro-technical commission (IEC 62220-1)-defined RQA5 radiographic techniques. Computed radiography (CR) posterior-anterior (PA) images of a hand for measuring the signal to noise ratio (SNR), the slit images for measuring the MTF. and the white images for measuring the NPS were obtained, and various multi-Scale image contrast amplification (MUSICA) factors were applied to each of the acquired images. All of the modifications. of the images obtained by using image processing had a considerable influence on the evaluated image quality," wrote H.S. Park and colleagues, Yonsei University.

  The researchers concluded: "The control parameters of image processing can be, accounted for evaluating characterization of image quality in same way. The results of this study should serve as a baseline for based oil evaluating imaging systems and their imaging characteristics by MTF NPS and DQE measurements."

  Park and colleagues published the results of their research in the Journal of the Korean Physical Society (Effects of Image Processing on the Detective Quantum Efficiency. Journal of the Korean Physical Society, 2010;56(2):653-658).

  For additional information, contact H.S. Park, Yonsei University, Dept. of Radiol Sci, Wonju 220710, South Korea.

  The publisher of the Journal of the Korean Physical Society can be contacted at: Korean Physical Society, 635-4, Yuksam-Dong, Kangnam-Ku, Seoul 135-703, South Korea.

  Keywords: Country:South Korea, Algorithms, Computers, Digital Radio, Electronics, Image Processing, Mathematics, Physics, Processing Algorithm, Software

  This article was prepared by VerticalNews Physics editors from staff and other reports. Copyright 2010, VerticalNews Physics via VerticalNews.com.