DOI QR코드

DOI QR Code

방사선 투과 및 불투과성 물질에 따른 감약 차이의 분석 : DECT 검사 중심으로

Analysis of Attenuation Differences According to Radiolucent and Radiopague Materials : Based on DECT (Dual Energy Computed Tomography)

  • 장현철 (수성대학교 방사선과) ;
  • 김윤신 (한양대학교 대학원 보건학과) ;
  • 김현주 (순천향대학교 부천병원 영상의학과)
  • Jang, Hyon-Chol (Department of Radiological Technology, Suseong College) ;
  • Kim, Yoon-Shin (Department of Health Science, Graduate School Hanyang University) ;
  • Kim, Hyeon-Ju (Department of Radiology, Soonchunhyang University Bucheon Hospital)
  • 투고 : 2013.10.24
  • 심사 : 2014.03.06
  • 발행 : 2014.03.31

초록

본 연구는 경기도 소재 S 대학병원에서 2013년 7월부터 8월까지 GE 사의 DECT(Dual Energy Computed Tomography)를 이용하여 방사선 투과 및 불투과성 물질을 임의로 선정, 에너지 영역 대별로 투과 및 불투과성 물질의 CT 값을 분석하였다. 또한, CT 값 분석 법을 이용하여 기존의 SECT(Single Energy Computed Tomography)에서 적용되는 120kVp CT 값과 가장 유사한 에너지 영역대를 도출하였으며 임상 적용 시 가시 영역 범위 내에서 대조도를 주었을 때 가장 유용하며 적절한 물질을 알아보았다. 결론으로 생리식염수, 메틸셀룰로스, 초음파용 젤과 같이 밀도가 낮고 수분 함유량이 많은 경우 90KeV 이후 CT 값의 감소가 거의 없었으며, 공기와 조영제처럼 밀도가 매우 낮거나 높은 물질의 경우 에너지의 영향을 적게 받는 것으로 분석되었으며 메틸셀룰로오스와 초음파 젤의 경우 임상 적용 시 가장 유용성이 있는 물질로 사료된다.

This study analyzed CT values of radiolucent and radiopaque materials by energy region after selecting radiolucent and radiopaque materials at random using GE's DECT((Dual Energy Com-puted Tomography) at S University Hospital located in Gyeonggi-province from July through August in 2013. Besides, it drew out the most analogous energy region to the value of 120kVp CT, which is applied to existing SECT(Single Energy Computed Tomography), by utilizing the analysis method of CT values and tried to find out the most useful and appropriate materials when contrast was applied within visible area in clinical application. As a result, there was little decrease of CT value after 90KeV in the case of materials with low density and high moisture content such as normal saline, methyl-cellulose and gels used in ultra-sonic waves test; energy does not influence much on materials with extremely low or high density such as air and contrast medium; methyl-cellulose and gels used in ultra-sonic waves test are considered to be the most useful materials for clinical applications.

키워드

참고문헌

  1. Y. H. Ko, D. C. Kwon, K. K. Kim, "Textbook of Computed Tomography", pp. 44-53, Chung-ku Publishing co, 2009.
  2. Balthazar EJ, Megibow AJ, Hulnick D, Naidich DP. " Carcinoma of colon: detection and preoperative staging by CT", AJR Am J Roentgenol, 150, pp. 301-306, 1998. DOI: http://dx.doi.org/10.2214/ajr.150.2.301
  3. Angelelli G, Macarini L, Lupo L, Caputi-Jambr enghi O, Pannarale O, Memeo V, " Rectal carcinoma: CT staging with water as contrast medium", Radiology, 177, pp. 511-514, 1990. https://doi.org/10.1148/radiology.177.2.2217794
  4. Angelli G, Macarni L, "CT of the bowel: use of water to enhance depiction", Radiology, 169, pp. 848-849, 1988. https://doi.org/10.1148/radiology.169.3.3187013
  5. Baert AL, Roex L, Wilms G, Marchal G, Deschepper C, "Computed tomography of the rectum with water as contrast agent", Gastrointest Radiol 14, pp. :345-348, 1989. https://doi.org/10.1007/BF01889234
  6. Dilmanian FA, Wu XY, Parsons EC, "Single and dual-energy CT with monochromatic synchrotron X-ray", Phys Med Biol, 42, pp. 371-387, 1997. DOI: http://dx.doi.org/10.1088/0031-9155/42/2/009
  7. Ogden K, Huda W, Scalzetti EM, Roskopf ML, "Patient size and X-ray transmission in body CT", Health Phys, 86, 4, pp. 397-405, 2004. DOI: http://dx.doi.org/10.1097/00004032-200404000-00009
  8. F. Kelcz, P. M. Joseph, S. K. Hilal, "Noise considerations in dual energy CT scanning", Med Phys, 6, pp. 418-425, 1979. DOI: http://dx.doi.org/10.1118/1.594520
  9. Naveen Chandra, David A, Langan, "Gemstone Detector: Dual Energy Imaging via Fast kVp Switching", Medical Radiology, pp. 35-41, 2011.
  10. Karacaaltincaba M, Aktas A, "Dual-energy CT revisited with multidetector CT: review of principles and clinical applications", Diagn Interv Radiol, pp. 1305-3825, 2010.
  11. Fletcher JG, Takahashi N, Hartman R, "Dual-energy and dual-source CT is there a role in the abdomen and pelvis", Radiol clin North Am, 47, pp. 41-57, 2009. DOI: http://dx.doi.org/10.1016/j.rcl.2008.10.003
  12. Wu X, Langan DA, Xu D, "Monochromatic CT image representation via fast switching dual kVp, Proc SPIE, 7258, pp. 725-845, 2009. DOI: http://dx.doi.org/10.1117/12.811698
  13. Kazuhiro M, Masahiro J, Yutaka T, "Virtual monochromatic spectral imaging with Fast kilovolt age switching: Improved image quality as compared with obtained with convenstional 120kVp CT", Invest Radiol, 259, 1, pp. 257-262, 2011.