Diode-based transmission detector for IMRT delivery monitoring: a validation study.

Journal Article (Journal Article)

The purpose of this work was to evaluate the potential of a new transmission detector for real-time quality assurance of dynamic-MLC-based radiotherapy. The accuracy of detecting dose variation and static/dynamic MLC position deviations was measured, as well as the impact of the device on the radiation field (surface dose, transmission). Measured dose variations agreed with the known variations within 0.3%. The measurement of static and dynamic MLC position deviations matched the known deviations with high accuracy (0.7-1.2 mm). The absorption of the device was minimal (~ 1%). The increased surface dose was small (1%-9%) but, when added to existing collimator scatter effects could become significant at large field sizes (≥ 30 × 30 cm2). Overall the accuracy and speed of the device show good potential for real-time quality assurance.

Full Text

Duke Authors

Cited Authors

  • Li, T; Wu, QJ; Matzen, T; Yin, F-F; O'Daniel, JC

Published Date

  • September 8, 2016

Published In

Volume / Issue

  • 17 / 5

Start / End Page

  • 235 - 244

PubMed ID

  • 27685115

Pubmed Central ID

  • PMC5874094

Electronic International Standard Serial Number (EISSN)

  • 1526-9914

Digital Object Identifier (DOI)

  • 10.1120/jacmp.v17i5.6204


  • eng

Conference Location

  • United States