Browse > Article
http://dx.doi.org/10.7742/jksr.2019.13.4.589

The Study on Interpretation of the Scatter Degradation Factor using an additional Filter in a Medical Imaging System  

Kang, Sang Sik (Department of Radiological Science, International University of Korea)
Kim, Kyo Tae (Research Team of Radiological Physics & Engineering, Korea Institute of Radiological & Medical Sciences of Korea)
Park, Ji Koon (Department of Radiological Science, International University of Korea)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.4, 2019 , pp. 589-596 More about this Journal
Abstract
X-rays used for diagnosis have a continuous energy distribution. However, photons with low energy not only reduce image contrast, but also contribute to the patient's radiation exposure. Therefore, clinics currently use filters made of aluminum. Such filters are advantageous because they can reduce the exposure of the patient to radiation. However, they may have negative effects on imaging quality, as they lead to increases in the scattered dose. In this study, we investigated the effects of the scattered dose generated by an aluminum filter on medical image quality. We used the relative standard deviation and the scatter degradation factor as evaluation indices, as they can be used to quantitatively express the decrease in the degree of contrast in imaging. We verified that the scattered dose generated by the increase in the thickness of the aluminum filter causes degradation of the quality of medical images.
Keywords
X-ray; image quality; aluminum filter; scatter degradation factor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 I. H. Choi, K. T. Kim, Y. J. Heo, S. S. Kang, S. C. Noh, B. J. Jung, S. H. Nam, J. K. Park, “The study of forward scattering dose according to the thickness of filter in general radiography,” Journal of the Korean Society of Radiology, Vol. 9, No. 7, pp. 445-448, 2015.   DOI
2 World Health Organization, "International basic safety standards for protection against ionizing radiation and for the safety of radiation sources," International Atomic Energy Agency, Vienna, 1996.
3 J. Valentin, "The 2007 recommendations of the international commission on radiological protection," Elsevier, Oxford, 2007.
4 R. O. Gorson, "NCRP 33: Medical X-ray and gamma ray protection for energies up to 10 MeV-Equipment design and use," National Council on Radiation Protection and Measurements, Washington, D.C., 1968.
5 R. Y. L. Chu and J. Fisher, "Standardized methods for measuring diagnostic x-ray exposures," American Institute of Physics, New York, 1990.
6 G. H. Lee, "Normal scan of the patient dose recommendation amount of radiology guidelines," Korea Food and Drug Administration, Cheongju, 2012.
7 G. Dougherty, "Digital image processing for medical applications," Cambridge University Press, New York, 2009.
8 H. Aichinger, J. Dierker, S. J. Barfuss, M. Sabel, "Radiation exposure and image quality in X-ray diagnostic radiology," Springer, Heidelberg, 2012.
9 C. M. Davisson and R. D. Evans, “Gamma-Ray absorption coefficients,” Reviews of Modern Physics, Vol. 24, No. 2, pp. 79-107, 1952.   DOI
10 R. D. Evans and N. Atome, "The Atomic Nucleus," McGraw-Hill, New York, 1955.
11 J. H. Siewerdsen, L. E. Antonuk, Y. E. Mohri, J. Yorkston, W. Huang, I. A. Cunningham, “Signal, noise power spectrum, and detective quantum efficiency of indirect-detection flat-panel imagers for diagnostic radiology,” Medical Physics, Vol. 25, No. 5, pp. 614-628, 1998.   DOI
12 L. Lanca and A. Silva, "Digital radiography detectors-A technical overview: Part 2," Radiography, Vol. 15, No. pp. 134-138, 2009.   DOI
13 C. B. Kim, “The MTF measurement of the conventional x-ray system by using the computed radiography,” Journal of the Korean Society of Radiology Sciences, Vol. 28, No. 2, pp. 111-115, 2005.