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KMID : 1151820150090060343
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 6 p.343 ~ p.348
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Clinical Analysis of Inverse Planning for Radiosurgery ; Gamma Knife Treatment Plan Study
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Jin Seong-Jin
Je Jae-Yong
Park Cheol-Woo
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Abstract
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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.
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KEYWORD
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Radiosurgery, Gamma knife, Forward planning, Inverse planning
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