ESTRO 2024 - Abstract Book

S3339

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

Figure 1: Bar plots (error bars: +/- 1 standard deviation) indicating the number of visible holes in the EPID QC phantom for different filter configurations on the inside and outside of the cassette.

Figure 2: Bar plots illustrating the mean VGA scores (VGAS) for processed and unprocessed images, demonstrating the impact of filtering and post-processing.

Conclusion:

Overall, CR with the incorporation of processing and filtering proves to be suitable for imaging for shielding block creation and position verification. When compared to radiographic film, CR offers several advantages, including a reduction in simulation time and dose delivery, a reusable image plate and integration of a digital workflow. The application of a front filter, preferably a high Z material, contributes to enhanced SNR and a reduction in scatter signal. Moreover, the use of internal filters demonstrates an improved ability to resolve contrast in smaller details and achieve sharper edges.