Physica Medica: European Journal of Medical Physics
Volume 26, Issue 4 , Pages 209-215 , October 2010

Reduction of patient dose in medical radiography by utilizing scattered X-rays: Relation between permissible limit of scatter fraction, viewer brightness, and perceptibility of vision

  • Yoshiyuki Asai

      Affiliations

    • Department of Central Radiology, Kinki University Hospital, 377-2, Ono-Higashi, Osaka-Sayama, Osaka 589-8511, Japan
    • Corresponding Author InformationCorresponding author. Tel.: +81 72 366 0221; fax: +81 725 55 4846.
    • ,
  • Masanobu Uemura

      Affiliations

    • Department of Central Radiology, Kinki University Hospital, 377-2, Ono-Higashi, Osaka-Sayama, Osaka 589-8511, Japan
    • ,
  • Masao Matsumoto

      Affiliations

    • Division of Health Sciences, Graduate School of Medicine, Osaka University, 1-7, Yamadaoka, Suita, Osaka 565-0871, Japan
    • ,
  • Hitoshi Kanamori

      Affiliations

    • Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan

Received 24 June 2009 ,Revised 27 November 2009 ,Accepted 8 January 2010.

References 

  1. Miettunen RH, Korhola OA. The effect of scatter reduction on the signal-to-noise ratio in computed radiography. Eur J Radiol. 1991;12:167–170
  2. Neitzel U. Grids or air gaps for scatter reduction in digital radiography: a model calculation. Med Phys. 1992;19:475–481
  3. Floyd CE, Chotas HG, Ravin CE. Scatter-reduction characteristics of an infinity-focused gridded radiographic cassette. Invest Radiol. 1994;29:852–855
  4. Floyd CE, Baydush AH, Lo JY, Bowsher JE, Ravin CE. Bayesian restoration of chest radiographs. Scatter compensation with improved signal-to-noise ratio. Invest Radiol. 1994;29:904–910
  5. Krol A, Bassano DA, Chamberlain CC, Prasad SC. Scatter reduction in mammography with air gap. Med Phys. 1996;23:1263–1270
  6. Baydush AH, Bowsher JE, Laading JK, Floyd CE. Improved Bayesian image estimation for digital chest radiography. Med Phys. 1997;24:539–545
  7. Rill LN, Brateman L, Arreola M. Evaluating radiographic parameters for mobile chest computed radiography: phantoms, image quality and effective dose. Med Phys. 2003;30:2727–2735
  8. Court L, Yamazaki T. Technical note: a comparison of antiscatter grids for digital radiography. Br J Radiol. 2004;77:950–952
  9. Doyle P, Martin CJ, Gentle D. Dose-image quality optimization in digital chest radiography. Radiat Prot Dosimetry. 2005;114:269–272
  10. Fetterly KA, Schueler BA. Experimental evaluation of fiber-interspaced antiscatter grids for large patient imaging with digital x-ray systems. Phys Med Biol. 2007;52:4863–4880
  11. Huda W. Assessment of the problem: pediatric doses in screen-film and digital radiography. Pediatr Radiol. 2004;34(Suppl. 3):S173–S182
  12. Seibert JA. Tradeoffs between image quality and dose. Pediatr Radiol. 2004;34(Suppl. 3):S183–S195
  13. Vassileva JA. Phantom approach to find the optimal technical parameters for plain chest radiography. Br J Radiol. 2004;77:648–653
  14. Samei E, Lo JY, Yoshizumi TT, Jesneck JL, Dobbins JT, Floyd CE, et al. Comparative scatter and dose performance of slot-scan and full-field digital chest radiography systems. Radiology. 2005;235:940–949
  15. Tsuji Y, Araki K, Endo A, Okano T. Scatter radiation in cephalometric radiography: the effects of grid and collimation. Dentomaxillofac Radiol. 2006;35:278–282
  16. Takigawa A, Yamashita K, Ishida T, Matsumoto M, Kanamori H. Effects of scattered-X-rays upon radiographic contrast and patient dose. J Photogr Sci. 1993;41:134–136
  17. Takigawa A, Matsumoto M, Ogata Y, Kanamori H. An example of the application of the contrast-dose diagram to medical radiographs. J Photogr Sci. 1995;43:95–98
  18. Kanamori H. The determination of the optimum density and the density-range of radiographs from visual effects. Jpn J Appl Phys. 1964;3:286–294
  19. Kanamori H. Determination of optimum film density range for roentgenograms from visual effects. Acta Radiol Diagn. 1966;4:463–476
  20. Asai Y, Ozaki Y, Kubota H, Matsumoto M, Kanamori H. Psychophysical RMS granularity for the evaluation of radiographic mottle. J Photogr Sci. 1995;43:103–107
  21. Asai Y, Ozaki Y, Kubota H, Matsumoto M, Kanamori H. Evaluation of radiographic mottle using a single frequency value of the psychophysical Wiener spectrum. J Photogr Sci. 1996;44:89–92
  22. Uemura M, Asai Y, Yamaguchi M, Fujita H, Shintani Y, Sanada S. Psychophysical evaluation of calibration curve for diagnostic LCD monitor. Radiat Med. 2006;24:653–658
  23. Asai Y, Tanabe Y, Ozaki Y, Kubota H, Matsumoto M, Kanamori H. Optimum tube voltage for chest radiographs obtained by psychophysical analysis. Med Phys. 1998;25:2170–2175
  24. Report 41 ICRU. Modulation transfer function of screen-film systems. International Commission on Radiation Units and Measurements; 1986;
  25. Doi K. Basic imaging properties of radiographic systems. Progress in medical radiation physics. Plenum Publishing Corporation. 1985;2:188–189
  26. Kanamori H, Matsumoto M. Information spectra for radiographs modified by scatter. Phys Med Biol. 1987;32:667–673
  27. Matsumoto M, Ozaki Y, Kubota H, Asai Y, Kanamori H. Equivalent spatial frequency and optimum film densities for the perceptibility of radiographic contrast of step-edge images. J Phogr Sci. 1995;43:99–102
  28. Kubota H, Ozaki Y, Matsumoto M, Kanamori H. Effects of x-ray tube voltage ripple and current mode on patient dose. Med Phys. 1993;20:1023–1028
  29. Birch R, Marshall M. Computation of bremsstrahlung x-ray spectra and comparison with measured Ge(Li) detector. Phys Med Biol. 1979;24:505–517
  30. Storm E. Emission of characteristic L and K radiation from thick tungsten targets. J Appl Phys. 1972;43:2790–2796
  31. Hubbell JH, Seltzer SM. Tables of X-ray mass attenuation coefficients and mass energy-absorption coefficients 1 keV to 20 MeV for elements Z = 1 to 92 and 48 additional substances of dosimetric interest. Washington, DC: Technology Administration. USGPO; 1995;
  32. Schmidt RA, Chan HP, Kodera Y, Doi K, Chen CT. Evaluation of cassette performance: physical factors affecting patient exposure and image contrast. Radiology. 1983;146:801–806
  33. Uffmann M, Schaefer-Prokop C, Neitzel U. Balance of required dose and image quality in digital radiography. Radiologe. 2008;48:249–257

PII: S1120-1797(10)00004-9

doi: 10.1016/j.ejmp.2010.01.002

Physica Medica: European Journal of Medical Physics
Volume 26, Issue 4 , Pages 209-215 , October 2010

Article Tools

* Image Usage & Resolution