Testing of dynamic multileaf collimation. Academic Article uri icon

Overview

abstract

  • It has been shown that intensity-modulated fields have the potential to deliver optimum dose distributions, i.e., high dose uniformity in the target and lower doses in the surrounding critical organs. One way to deliver such fields is by using dynamic multileaf collimation (DMLC). This capability is already available in research mode on some treatment machines. While much effort has been devoted to developing algorithms for DMLC, the mechanical reliability of this new treatment delivery mode has not been fully studied. In this work, we report a series of tests designed to investigate the mechanical aspects of DMLC and their implications on dosimetry. Specifically, these tests were designed to examine (1) the stability of leaf speed, (2) the effect of lateral disequilibrium on dose profiles between adjacent leaves, (3) the significance of acceleration and deceleration of leaf motion, (4) the effect of positional accuracy and rounded-end of the leaves, and (5) create a simple test pattern that may serve as a basis for routine quality assurance checks. Results of these tests are presented. The implications on dosimetry and consideration for the design of leaf motion are discussed.

publication date

  • May 1, 1996

Research

keywords

  • Radiotherapy
  • Radiotherapy Dosage

Identity

Scopus Document Identifier

  • 0029931223

Digital Object Identifier (DOI)

  • 10.1118/1.597699

PubMed ID

  • 8724734

Additional Document Info

volume

  • 23

issue

  • 5