Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Clinical Analysis of Inverse Planning for Radiosurgery ; Gamma Knife Treatment Plan Study

방사선 수술 역방향 치료계획 유용성 평가

  • Jin, Seong Jin (Department of Radiation Oncology, Gammaiknife Center, Inje University Haeundae Paik Hospital) ;
  • Je, Jae Yong (Department of Radiological Technology, Dong-Eui Institute of Technology) ;
  • Park, Cheol Woo (Department of Radiological Technology, Dong-Eui Institute of Technology)
  • 진성진 (인제대학교 해운대백병원) ;
  • 제재용 (동의과학대학교 방사선과) ;
  • 박철우 (동의과학대학교 방사선과)
  • Received : 2015.08.06
  • Published : 2015.10.30
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Abstract

The purpose of this study is a comparison of forward planning(FP) and inverse planning(IP) of a radiosurgery procedure. 10 patients of acoustic schwannoma MR image were used for treatment plan. FP-1,2 and IP were established under the same condition. FP and IP were compared by number of shot, conformity index(CI), paddic conformity index(PCI), gradiant index(GI) and treatment time. On average the treatment plan produced by IP tool provided an improved or similar CI, PCI, GI and reduced treatment time as compared to the FP (CI;FP-1:0.85, FP-2:0.86, IP:0.94, PCI;FP-1:0.79, FP-2:0.81, IP:0.78, GI;FP-1:2.94, FP-2:2.94, IP:3.01). The inverse planning system provides a clinically useful plan while reducing the planning time and treatment time.

감마나이프 방사선수술 전방향 치료계획과 역방향 치료계획을 비교 분석하였다. 10 case의 청신경초종 영상을 이용하여 동일한 조건으로 전방향 치료계획 1, 2(FP-1,2) 및 역방향 치료계획(IP)을 수립하고, 샷의 수(No of shot), conformity index(CI), Paddic conformity index(PCI), Gradiant index(GI), 치료시간 등을 비교 하였다. IP가 FP에 비하여 샷의 수가 적었으며, 표적용적이 증가할수록 샷의 수는 증가하였다. CI는 FP-1:0.85, FP-2 :0.86, IP:0.94, PCI는 FP-1:0.79, FP-2:0.81, IP:0.78로 IP가 높거나 비슷한 결과를 보였다. GI는 FP-1:2.94, FP-2:2.94, IP:3.01로 비슷한 값을 나타내었다. FP를 기준으로 상대적 조사시간은 전체적으로 IP가 짧은 것으로 나타났다. IP는 FP와 비슷하거나 우수한 평가값을 나타내고 치료계획에 소요되는 시간이 짧고 치료시간이 짧아 임상적으로 유용한 것으로 판단된다.

Keywords

References

  1. D.W. David, B. Greg, J. James, D. Beverly, "A review of 3 current radiosurgery systems", Surgical Neurology, Vol. 66, No. 6, pp. 559-564, 2006. https://doi.org/10.1016/j.surneu.2006.08.002
  2. C. Lindquist, I. Paddick, "The Leksell Gamma kinfe PERFEXION and comparisons with its predecessors", Neurosurgery, Vol. 61, No. 3, pp. 130-141, 2007. https://doi.org/10.1227/01.neu.0000279733.28768.ff
  3. W.S. Seo, I.H. Oh, S.K. Choi, Y.J. Lim, "Analysis of recent inverse planning for Gamma kinfe radiosurgery", International Journal of Radiosurgery, Vol. 1, No. 2, pp. 65-70, 2012.
  4. S. Yomo, M. Tamura, R. Carron, D. Porcehron, J. Regis, "A quantitative comparison of radiosurgical treatment parameters in vestibular schwannomas: the Leksell Gamma Knife Perfexion versus Model 4C", Acta Neurochirurgica, Vol. 152, No. 1, pp. 47-55, 2009. https://doi.org/10.1007/s00701-009-0510-3
  5. E. Shaw, R. Kline, M. Gillin, et al, "Radition therapy onclogy Group ; Radiosurgery quality assurance guidelines", Int J Radiation Oncol Biol Phys Vol. 27, No. 5, pp. 1231-1239, 1993. https://doi.org/10.1016/0360-3016(93)90548-A
  6. I. Paddick, "A simple scoring ratio to index the conformity of radiosurgical treatment plans". J Neurosurg, Vol. 93, Suppl. 3, pp. 219-222, 2000.
  7. I. Paddick, B. Lippitz, "A simple dose gradient measurement tool to complement the conformity index". J Neurosurg, Vol. 105, Suppl, pp. 194-201, 2006.
  8. ES. Murphy, GH. Barnet, MA. Vogelbaum, et al, "Long term outcoms of Gamma knife radiosurgery in patient with vestibular schwannomas". J Neurosurg, Vol. 114, No. 2, pp. 432-440, 2011. https://doi.org/10.3171/2009.12.JNS091339
  9. EH. Balagamwala, J.H. Suh, GH. Barnett, et al. "The importance of conformality, heterogeneity, and gradient indices in evaluation gamma knife radiosurgery treatment plans for intracranial meningiomas". Int J of radiation oncology biology physics, Vol. 83, No. 5, pp. 1406-1413, 2012. https://doi.org/10.1016/j.ijrobp.2011.10.024
  10. T.K. Lee, "The effect of forward planning and inverse planning in CyberKnife radiosurgery on rat brain" Catholic University of Korea, 2007.
  11. S.C. Han, D.J. Lee, "Differences in Target volume delineation using typical radiosurgery planning system", Progeress in medical physics, Vol. 24, No. 4, pp. 265-270, 2013.

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