|Table of Contents|

Dosimetric effect of avoidance sector in cervical volumetric modulated arc therapy plans

Journal Of Modern Oncology[ISSN:1672-4992/CN:61-1415/R]

Issue:
2023 12
Page:
2298-2303
Research Field:
Publishing date:

Info

Title:
Dosimetric effect of avoidance sector in cervical volumetric modulated arc therapy plans
Author(s):
HAO JinlongZENG JingSONG MingyongPING QuanhongZHAO Jianguo
Tianjin Central Hospital of Gynecology Obstetrics,Tianjin 300199,China.
Keywords:
volumetric modulated arc therapyavoidance sectordosimetric comparisonmean dose of small intestine
PACS:
R737.33
DOI:
10.3969/j.issn.1672-4992.2023.12.022
Abstract:
Objective:To study the effect of avoidance sector(AS) on dose distribution in volumetric modulated arc therapy(VMAT) plans for cervical cancer,and explore the feasibility of promoting small intestine sparing by setting AS.Methods:52 patients with cervical cancer who had received definitive radiotherapy were chosen for study.Two groups of VMAT plans were designed.The first group of plans contained two full arc fields of 360°,referred to as Group FA.The second group of plans was generated with an AS of 315°~45° for both arcs on the basis of the first group,which was referred to as Group I90.Dosimetric parameters of the two groups were compared and analyzed.Results:The mean dose of small intestine of Group FA and I90 were labeled as DmeanINT_FA and DmeanINT_I90,respectively.The whole aggregate of 52 patients was divided into three subaggregates according to DmeanINT_FA,namely L(DmeanINT_FA≤26 Gy),M(26 Gy27.5 Gy).For patients of subaggregate L,DmeanINT_FA>DmeanINT_I90.Yet for patients of subaggregate H,DmeanINT_FA

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Memo

Memo:
天津市卫生健康科技项目(编号:KJ20109,ZC20111);天津市医学重点学科(专科)建设项目(编号:妇产科学TJYXZDXK-043A)
Last Update: 1900-01-01