Dosimetric comparison in sparing normal tissue dosage by using auto-SBRT planning in oligo liver tumors.

ABSTRACT:

Purpose

The study aimed to compare the dosimetric distribution of VMAT plans by increasing the number of half arcs in liver SBRT and investigate the effect by using automatic plan software in plan optimization.

Method

Thirty-one patients with oligo liver tumors were randomly selected. VMAT treatment plans with different numbers of coplanar half arcs were generated.

Result

Adding arcs significantly increased the PTV, D_2%, D_50%, and CI, but sacrificed the plan homogeneity. It also decreased the maximum dose of normal tissues such as the stomach, duodenum, and spinal cord and reduced D_mean, D_500cc, and D_700cc for the liver. Nevertheless, the diminishing effect gradually decay

SUBMITTER: Zhang S 

PROVIDER: S-EPMC10665725 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature