Objectives {7}
breast cancer
BREAST CANCER
The primary objective of the study is to test the accuracy and usability of Breathe Well to assist DIBH during breast cancer radiotherapy. Breathe Well will be tested against the commercially available real-time position management (RPM) / respiratory gating for scanners (RGSC) system (Varian Medical Systems, Palo Alto, CA), which has been extended in-house to provide a screen for visual feedback.The primary hypothesis is that the accuracy of Breathe Well in maintaining the position of the chest during DIBH is superior to the RPM/RGSC system. Because Breathe Well monitors the chest directly, while the RPM/RGSC system uses a marker block positioned on the upper abdomen, Breathe Well has the advantage of utilising a more immediate surrogate of the chest wall position. In addition, we hypothesise that Breathe Well is more user-friendly as it was specifically designed for guiding breast cancer patients through DIBH treatments.Secondary objectives:To measure the setup times for both the Breathe Well and the modified RPM/RGSC system for all fractions. We hypothesise that Breathe Well can be set up faster than the modified RPM/RGSC system.To investigate patient comfort and user friendliness of Breathe Well via a patient survey (To investigate staff perception of Breathe Well via a technology assessment survey (To develop — offline — the use of the electronic portal imaging device (EPID) for real-time MLC tracking during monitoring the chest wall position in breast radiotherapy.To investigate, using dose reconstruction, the estimated dose delivered during radiotherapy and compare this with the planned dose.