Browse > Article
http://dx.doi.org/10.7742/jksr.2011.5.6.421

Assessment of dose effects on image quality at chest computed radiography  

Kang, Bo-Sun (Department of Radiological Science, College of Medical Science, Konyang University)
Publication Information
Journal of the Korean Society of Radiology / v.5, no.6, 2011 , pp. 421-426 More about this Journal
Abstract
This research was accomplished to assess dose effects on image quality at computed radiography (CR). The ultimate target of the research was finding optimized exposure that provides necessary image quality for the clinical chest diagnosis. Modulation transfer function (MTF), normalized noise power spectrum (NNPS), and Noise equivalent quanta (NEQ) corresponding to the different doses were measured for the assessment of image quality. The preparation of "edge test device" used in MTF measurement and experimental geometry setup were followed by the recommendations of International Electrotechnical Commission (IEC). The experimental results show the necessary image quality can be achieved even at a half of the automatic exposure control (AEC) setting dose for chest diagnosis. It means that the patient exposure can be reduced dramatically by using optimized dose.
Keywords
computed radiography (CR); chest image quality; dose control; optimized dose; modulation transfer function (MTF); noise power spectrum (NPS); noise equivalent quanta (NEQ);
Citations & Related Records
연도 인용수 순위
  • Reference
1 John E. Aldrich, Emerenciana Duran, Pat Dunlop, and John R.Mayo, Optimization of Dose and Image Quality for Computed Radiography and Digital Radiography, J. of Digital Imaging, 19, pp.126-131, (2006).   DOI   ScienceOn
2 J. A. Rowlands, The physics of computed radiography, Phys. Med. Biol. 47, R123-R166, (2002).   DOI   ScienceOn
3 International Electrotechnical Commission, Diagnostic Imaging Equipment, IEC 62220‐1, (2002).
4 J. T. Dobbins, D. L. Ergun, L. Rutz, D. A. Hinshaw, H. Blume, and D.C. Clark, Med. Phys. 22, 1581 (1995).   DOI   ScienceOn
5 E. Samei, M. J. Flynn and H. G. Chotas, Proc. SPIE 4320, 189 (2001).
6 J. T. Dobbins III, "Image Quality Metrics for Digital Systemss", in Handbook of Medical Imaging, Physics and Psychophysics, J. Beutel, H. L. Kundel, R. Van Metter, Eds. Bellingham, WA: SPIE, Vol. 1, pp. 121-126, (2000).
7 www.listem.co.kr
8 http://www.agfa.com
9 http://www.elimpex.com/products/diagnostic‐radiology/measuring‐x‐ray/victoreenrad.pdf
10 A. Badano, R. M. Gagne, B. D. Gallas et. al., Lubberts effect in columnar phosphors, Med. Phys. 31, 3122, (20   DOI   ScienceOn