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Physical Image Quality Evaluation of Medical Radiographs

Wan Muhamad Saridan Wan Hassan, and Yusof Munajat, and Shamsul Shahibuddin, (2002) Physical Image Quality Evaluation of Medical Radiographs. Jurnal Fizik Malaysia, 23 (1 - 4). pp. 201-206. ISSN 0128-0333

Full text not available from this repository.

Affiliations

Universiti Teknologi Malaysia. Faculty of Science. Dept. of Physics
Universiti Teknologi Malaysia. Faculty of Computer Science and Information System. Dept. of Systems and Engineering Computing

Abstract

The noise equivalent quanta (NEQ) has been recommended as a measure of physical quality of medical images. Digitized data of medical radiographs in a previous work have been analyzed in terms of resolution via the modulation transfer function (MTF) and noise via the noise power spectrum (NPS), but not in terms of NEQ. As the NEQ is currently regarded as a basic device performance measure of the imaging system, it is very useful to be able to determine it. The average gamma of the radiograph was computed, both the MTF and the NPS data were interpolated and these values were used to compute the NEQ. The computation shows that for spatial frequency range 0 - 0.7 cycles/mm the NEQ of Lanex Regular/T Mat G screen-film combination is slightly lower than that of Lanex Regular/T Mat L, for 0.7 - 1.5 cycles/mm the NEQ of both are almost the same, and for frequencies greater than 1.5 cycles/mm the NEQ of the former is greater than that of the latter.

Item Type:Journal
Keywords:Diagnostic radiology; medical imaging: modulation transfer function: noise equivalent quanta; noise power spectrum
Subjects:Q Science, Computer Science
ID Code:3576

[1] ICRU, Medical Imaging The Assessment of Image Quality, ICRU Report 54, International Commission on Radiation Units and Measurements, Bethesda, Maryland, USA (1995).

[2] C. E. Metz, R. F. Wagner, K. Doi, D. G. Brown, R. M. Nishikawa, and K. J. Myers, Medical Physics, 22, 1057 (1995).

[3] J. M. Sandrik and R. F. Wagner, Medical Physics, 9, 540 (1982).

[4] Hassan W.M.S.W., Measurement of modulation transfer function and Wiener spectrum of diagnostic X-ray screen-film systems in a hospital setting, Ph.D. thesis, University of Aberdeen (1998).

[5] J. Morishita, K. Doi, R. Bollen, P. C. Bunch, D. Hoeschen, G. Sirand-rey and Y. Sukenobu, Medical Physics, 22, 193 (1995).

[6] FAXIL, Tutorial on the image quality characteristics of radiographic screen-film systems and their measurement, MDD Evaluation Report MDD/94/34,Facility for the Assessment of X-ray Imaging at Leeds University, The General Infirmary, Leeds (1994).

[7] H. M. Kramer, Radiation Protection Dosimetry, 43, 107 (1992).

[8] H. E. Johns and J. R. Cunningham, The physics of radiology, 4th. ed., Charles C. Thomas Publisher, Springfield, Illinois, USA (1983), pp. 66—68.

[9] K. Doi, Y. Kodera, L. N. Loo, H. P. Chan, Y. Higashida, and R. J. Jennings, MTF’s and Wiener spectra of radiographic screen-film systems — Volume II (Including speeds of screens, films, and screen-film systems), HHS Publication FDA 86-8257, U.S. Department of Health and Human Services, Public Health Service, Food and Drug Administration, Center for Devices and Radiological Health, Rockville, Maryland (1986).

[10] J. W. Coitman, Journal of the Optical Society of America, 44, 468 (1954).

[11] Hassan W.M.S.W., Jurnal Teknologi, 34(C), 35 (2001).

[12] H. E. Johns and J. R. Cunningham, The physics of radiology, 4th. ed., Charles C. Thomas Publisher, Springfield, Illinois, USA (1983), p. 580.

[13] FAXIL, Physical evaluation of the imaging performance of Dupont ultra-vision screen-film system, MDA Evaluation Report MDA/94/40, Facility for the Assessment of X-ray Imaging at Leeds University, The General Infirmary, Leeds (1994).

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