Benjamin Zwan
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View article: Comparing immobilisation devices in gynaecological external beam radiotherapy: improving inter‐fraction reproducibility of pelvic tilt
Comparing immobilisation devices in gynaecological external beam radiotherapy: improving inter‐fraction reproducibility of pelvic tilt Open
Introduction The aim was to determine which immobilisation device improved inter‐fraction reproducibly of pelvic tilt and required the least pre‐treatment setup and planning interventions. Methods Sixteen patients were retrospectively revi…
View article: Additional file 1 of BRAVEHeart: a randomised trial comparing the accuracy of Breathe Well and RPM for deep inspiration breath hold breast cancer radiotherapy
Additional file 1 of BRAVEHeart: a randomised trial comparing the accuracy of Breathe Well and RPM for deep inspiration breath hold breast cancer radiotherapy Open
Additional file 1. Biofeedback Radiation Therapist Survey. Biofeedback Patient Survey.
View article: A novel quality assurance procedure for trajectory log validation using phantom‐less real‐time latency corrected EPID images
A novel quality assurance procedure for trajectory log validation using phantom‐less real‐time latency corrected EPID images Open
The use of trajectory log files for routine patient quality assurance is gaining acceptance. Such use requires the validation of the trajectory log itself. However, the accurate localization of a multileaf collimator (MLC) leaf while it is…
View article: Predictive quality assurance of a linear accelerator based on the machine performance check application using statistical process control and ARIMA forecast modeling
Predictive quality assurance of a linear accelerator based on the machine performance check application using statistical process control and ARIMA forecast modeling Open
Purpose A predictive linac quality assurance system based on the output of the Machine Performance Check (MPC) application was developed using statistical process control and autoregressive integrated moving average forecast modeling. The …
View article: A novel and independent method for time‐resolved gantry angle quality assurance for <scp>VMAT</scp>
A novel and independent method for time‐resolved gantry angle quality assurance for <span>VMAT</span> Open
Volumetric‐modulated arc therapy ( VMAT ) treatment delivery requires three key dynamic components; gantry rotation, dose rate modulation, and multi‐leaf collimator motion, which are all simultaneously varied during the delivery. Misalignm…
View article: The dosimetric impact of control point spacing for sliding gap MLC fields
The dosimetric impact of control point spacing for sliding gap MLC fields Open
Dynamic sliding gap multileaf collimator (MLC) fields are used to model MLC properties within the treatment planning system (TPS) for dynamic treatments. One of the key MLC properties in the Eclipse TPS is the dosimetric leaf gap (DLG) and…
View article: EPID‐based dosimetry to verify IMRT planar dose distribution for the aS1200 EPID and FFF beams
EPID‐based dosimetry to verify IMRT planar dose distribution for the aS1200 EPID and FFF beams Open
We proposed to perform a basic dosimetry commissioning on a new imager system, the Varian aS1200 electronic portal imaging device (EPID) and TrueBeam 2.0 linear accelerator for flattened (FF) and flattening filter‐free (FFF) beams, then to…
View article: An EPID‐based system for gantry‐resolved MLC quality assurance for VMAT
An EPID‐based system for gantry‐resolved MLC quality assurance for VMAT Open
Multileaf collimator (MLC) positions should be precisely and independently measured as a function of gantry angle as part of a comprehensive quality assurance (QA) program for volumetric‐modulated arc therapy (VMAT). It is also ideal that …
View article: Investigation of a real-time EPID-based patient dose monitoring safety system using site-specific control limits
Investigation of a real-time EPID-based patient dose monitoring safety system using site-specific control limits Open
An EPID-based real-time error detection method for treatment verification during dynamic IMRT has been developed and tested for its performance and limitations. The system is able to detect gross errors in real-time, however improvement in…