A technique to reduce low dose region for craniospinal irradiation (CSI) with RapidArc and its dosimetric comparison with 3D conformal technique (3DCRT)

Roopam Srivastava, Gagan Saini, Pramod Sharma, Manish Chomal, Anchal Aagarwal, Sapna Nangia, Madhur Garg

Research output: Contribution to journalArticle

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We proposed a method to reduce the volume of normal tissues irradiated by low doses in patients receiving CSI with RapidArc (RA) using Avoidance-Sector technique (RA+AS) and to compare its dosimetric implications with RA using full-arc (RA+FA) and 3D conformal technique (3DCRT). Four patients of CSI were retrospectively planned with 3DCRT, RA+FA, and RA+AS. Conformity-Index (CI), Homogeneity-Index (HI), and Paddick Gradient-Index (GI) were calculated. Quantitative evaluation was done using DVH analysis for PTVs and OARs. When compared with 3DCRT, GI, CI, and HI were favorable to RA based techniques. In comparison with 3DCRT the doses to OARs were lower with RA+AS with the difference being statistically significant in most instances. RA+AS significantly decreases the dose to OARs and their volumes receiving low doses in comparison with RA+FA and 3DCRT.

Original languageEnglish (US)
Pages (from-to)488-491
Number of pages4
JournalJournal of cancer research and therapeutics
Issue number2
Publication statusPublished - Apr 1 2015



  • Avoidance sector technique in RapidArc
  • RapidArc
  • V5 in lung
  • craniospinal irradiation

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging

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