ESTRO 2024 - Abstract Book

S2742

Interdisciplinary - Global health

ESTRO 2024

Results:

In 2019, there were 43,433 visits to the radiotherapy center over 2625 EBRT courses with an estimated total travelled distance by patients of 2.67 million km. This caused an estimated 394 tonnes of CO 2 e emissions. Implementation of state-of-the-art hypofractionation would reduce the emissions to 322 tonnes, a decrease of 18.3%. Secondly, we specifically looked at the impact on the two most frequent indications: breast/chest wall and prostate(-bed) irradiations, all with or without regional nodes. The decreases in emissions in these groups were estimated to be 32.4% (82.9 vs 56.0 tonnes) for breast cancer patients and 48.5% (56.4 vs 29.1 tonnes) for prostate cancer patients (see figure below).

Regarding the energy measurements, the LINAC consumed 3.11 kW in ‘stand-by’ mode and 8.85 kW in ‘on’ mode. When comparing a prostate cancer treatment in 16 (n = 2) and 5 fractions (n = 2), the power logger measured similar values during ‘beam-on’ time, namely 20 – 28 kW on average during 3 – 4 minutes. The energy use during ‘beam-on’ time was 1.66 vs 1.59 kWh (16 vs 5 fractions). For the total course, energy consumption was on average