Journal of Digital Convergence (디지털융복합연구)

The Society of Digital Policy and Management (한국디지털정책학회)
권호 표지
DOI QR코드

DOI QR Code

The Study of Effectiveness of Volume Mode in Pediatric CT

소아 전산화단층촬영에서 Volume Mode의 유용성 연구

  • Park, Yun (Dept. of Radiology, Seoul National University Hospital) ;
  • Kim, Sang-Hyun (Dept. of Radiology, Seoul National University Hospital)
  • 박연 (서울대학교병원 영상의학과) ;
  • 김상현 (서울대학교병원 영상의학과)
  • Received : 2014.08.13
  • Accepted : 2014.10.20
  • Published : 2014.10.28
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study is to analyze dose comparison and image quality evaluation according to Volume and Helical mode using ATOM Phantom. It is to actively use the Volume mode in pediatric CT examinations. There was no significant difference with Helical and Volume in the value of Noise, HU, SNR(p>0.05). All dose values was no statistical difference(p>0.05). In the value of DLP and effective dose by part, Volume mode was measured lower than Helical mode. For qualitative analysis, by scan parameter helical mode showed respectively 2.6, 3.3, 4.36 and Volume mode indicated 2.8, 3.64, 4.44 point. Image evaluation for the follow-up, Helical mode and Volume mode were respectively 3.8 and 3.83. In fact, There was no significant difference. In CT scans in children under 5 years, because 640-MDCT Volume scan dose compared with Helical mode is lower and there is no significant difference with two modes in the image quality, 640-MDCT Volume scan is thought to be useful for pediatric CT scans.

본 연구는 ATOM Phantom을 이용하여 선량, 화질을 비교 분석 하여 Volume mode의 유용성 밝혀 소아 CT 검사에 적극적으로 사용하기 위함이다. Helical mode Noise와 Volume mode의 Noise, HU, SNR은 p>0.05 이므로 통계적으로 유이한 차이가 없음을 알 수 있었다. 각 부위별 선량값은 모두 p>0.05 이므로 통계적 유이한 차이가 없었으나 DLP값이 Helical mode보다 Volume mode가 더 낮게 측정되었다. 유효선량 역시 Volume mode가 Helical mode 보다 낮음을 알 수 있었다. 정성적 분석에서는 Mode에 따른 조건 별로 각각 Helical: 2.6, 3.3, 4.36 Volume: 2.8, 3.64, 4.44, Mode별 Follow up 영상평가 결과로는 Helical mode가 3.8 Volume mode가 3.83점으로 큰 차이가 없는 것으로 나타났다. 5세 이하의 소아 CT검사에 있어서 640-MDCT Volume scan이 Helical mode와 비교해 낮은 선량으로 영상의 질이 큰 차이가 없기에 소아 CT 검사에는 유용 하다고 생각된다.

Keywords

References

  1. H. W. Lee, D. R. Lee, H. K. Kang, S. H. Lee, C. N. Kim, K. W. Kim, Image quality and DLP of 640-MSCT, Journal of Korean Society Compute Tomography Technology, Vol. 15, No. 1, pp. 159-170, 2013.
  2. S. Diekmann, Dose Exposure of Patients Undergoing Comprehenive Stroke Imaging by Multidetector Row CT, AJNR, Vol. 31, pp. 1003-09, 2010. https://doi.org/10.3174/ajnr.A1971
  3. D. K. Na, MDCT Application in Neuroradiology. The 3rd Seoul National University Hospital MDCT Symposium, pp. 51-62, 2006.
  4. ICRP, 2008. 2009 Managing Patient Dose in Multi-Detector Computed Tomography, ICRP Publication 102, Ann, pp 79-84.
  5. S. K. Lee, MDCT application in neuroimaging, J Korean Med Assoc, Vol. 50, No. 1, pp. 51-56, 2007. https://doi.org/10.5124/jkma.2007.50.1.51
  6. S. O. Kwon, D. Y. Ha, H. H. Jeong, S. K. Kim, D. S. Suh, D. S. Chang, Determination of optimal scan exposure factors for pediatric patients in computed tomography, KSCCT, Vol. 7, No. 1, pp. 173-183, 2005.
  7. Dr. Lane Donnelly, CT over Exposure for Three Dimension Obtain. science-health-ct-dc, 01. 22, 2001.
  8. Y. N. Lee, H. H. Kang, S. S. Son, C. H. Park, An Analysis of the Usefulness of Cardiography for Children using High Pitch Mode in Dual-Source CT, Journal of Korean Society Compute Tomography Technology Vol. 14, No. 1, pp. 127-133, 2012.
  9. Health Insurance Review & Assessment Service, Medical expense of health insurance, 01, 2013.
  10. G. T. Yang, M. S. Kim, S. H. Son, H. D. Park, J. S. Jeong, M. G. Kim, A Studey of optimal radiation dose of CT using ASIS, KSCCT, Vol. 13, No. 2, pp. 67-73, 2011.
  11. J Geleijin. M Salvado Artells, P W de Bruin, R Matter, Y muranatsu, M F McNitt-Gray, Computed tomography dose assessment for a 160mm wide, 320 detector row. cone beam CT scanner, Phys Med Biol. Vol. 54, No. 10, pp. 3141-3159, 2009 https://doi.org/10.1088/0031-9155/54/10/012
  12. Lucia J. M. Kroft.Joost J. H, Roelofs.Jacob Geleijns scan time and patient dose for thorcic imaging in neonates and small children using axial volumetric 320-detector row CT compared to helicla 64-, 32-, and 16-detector row CT acquisitions, Pediatric radiology, Vol. 40, pp. 294-300, 2010. https://doi.org/10.1007/s00247-009-1436-x
  13. Y. K. Cha, M. S. Lee, S. J. Lee, Mage quality and radiation doses of 320-MDCT for whole brain CT angiography(CTA): comparison with 64-MDCT, Journal of Korean Society Compute Tomography Technology, Vol. 14, No. 2, pp. 85-95, 2012.
  14. J. K. Lee, S. J. Jang, Y. I. Jang, Medical radiation exposur in children CT and Dose Reduction, International Journal of Contents, Vol. 14, No. 1, pp. 344-363, 2014.