Dose comparison between prescription methods according to anatomical variations in intracavitary brachytherapy for cervical cancer.

ABSTRACT:

Purpose

We compared how doses delivered via two-dimensional (2D) intracavitary brachytherapy (ICBT) and three-dimensional (3D) ICBT varied anatomically.

Materials and methods

A total of 50 patients who received 30 Gy of 3D ICBT after external radiotherapy (RT) were enrolled. We compared the doses of the actual 3D and 2D ICBT plans among patients grouped according to six anatomical variations: differences in a small-bowel V2Gy, small bowel circumference, the direction of bladder distension, bladder volume, sigmoid V3.5Gy, and sigmoid circumference. Seven dose parameters were measured in line with the EMBRACE recommendations.

Results

In terms of bladder volume, the bladder and small-bowel D2cc values were lower in the 150-250 mL bladder volume subgroup; and the rectum,

SUBMITTER: Choi E 

PROVIDER: S-EPMC6226137 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature