Simple calculation using anatomical features on pre-treatment verification CT for bladder volume estimation during radiation therapy for rectal cancer.

ABSTRACT:

Background

Despite detailed instruction for full bladder, patients are unable to maintain consistent bladder filling during a 5-week pelvic radiation therapy (RT) course. We investigated the best bladder volume estimation procedure for verifying consistent bladder volume.

Methods

We reviewed 462 patients who underwent pelvic RT. Biofeedback using a bladder scanner was conducted before simulation and during treatment. Exact bladder volume was calculated by bladder inner wall contour based on CT images (V_ctsim). Bladder volume was estimated either by bladder scanner (V_scan) or anatomical features from the presacral promontory to the bladder base and dome in the sagittal plane of CT (V_ratio). The feasibility of V_ratio was validated us

SUBMITTER: Kim N 

PROVIDER: S-EPMC7528380 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature