A comprehensive quality assurance program for four-dimensional computed tomography in radiotherapy

From computed tomography innovation to routine clinical application in radiation oncology – A joint initiative of close collaboration

“…This joint initiative of close collaboration originating from an ESTRO Physics workshop has been transitioned into an active CT-in-RT working group with three focus areas: Respiratory 4DCT, DECT for delineation and DECT for dose calculation. Some of the results have already been published in this special issue [13] , [14] .…”

“…With a recently available 4DCT scan mode, which automatically adapts the 4DCT acquisition according to the patient’s breathing pattern, artefacts caused by irregular breathing can be reduced [12] , [43] . To assess the geometrical accuracy and precision of respiratory 4DCT imaging, a new standardised procedure for 4DCT quality assurance (QA) with an automated evaluation workflow has been proposed [13] . This QA procedure was successfully validated in twelve centres on CT scanners from three different vendors [14] .…”