Quality assurance for a six degrees-of-freedom table using a 3D printed phantom.

ABSTRACT:

Purpose

To establish a streamlined end-to-end test of a 6 degrees-of-freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance.

Methods

A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball-bearing (BB). The phantom underwent each step of the radiation therapy process: CT simulation in a straight orientation, plan generation using the treatment planning software, setup to offset marks at the linac, registration and corrected 6DoF table adjustments via hidden target test, delivery of a Winston-Lutz test to the BB, and verification of table positioning via field and laser lights. The registration values, maximum total displacement of the combined Winston-Lutz fields, and a pass or fail criterion

SUBMITTER: Woods K 

PROVIDER: S-EPMC5768004 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature