Journal article

Dosimetric end-to-end tests in a national audit of 3D conformal radiotherapy

Joerg Lehmann, Andrew Alves, Leon Dunn, Maddison Shaw, John Kenny, Stephanie Keehan, Jeremy Supple, Francis Gibbons, Sophie Manktelow, Chris Oliver, Tomas Kron, Ivan Williams, Jessica Lye

PHYSICS & IMAGING IN RADIATION ONCOLOGY | ELSEVIER | Published : 2018

Abstract

Background and purpose: Independent dosimetry audits improve quality and safety of radiation therapy. This work reports on design and findings of a comprehensive 3D conformal radiotherapy (3D-CRT) Level III audit. Materials and methods: The audit was conducted as onsite audit using an anthropomorphic thorax phantom in an end-to-end test by the Australian Clinical Dosimetry Service (ACDS). Absolute dose point measurements were performed with Farmer-type ionization chambers. The audited treatment plans included open and half blocked fields, wedges and lung inhomogeneities. Audit results were determined as Pass Optimal Level (deviations within 3.3%), Pass Action Level (greater than 3.3% but wit..

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