KEY POINTS
- Technical validation study of the unshielded SunSILICON 1048 silicon diode detector for clinical relative electron beam dosimetry.
- Measurements were performed on a Varian TrueBeam using a SunSCAN 3D water phantom, across electron energies from 6 to 22 MeV and field sizes from 6 × 6 cm² to 25 × 25 cm².
- SunSILICON percentage depth doses agreed with SNC350p-derived percentage depth doses within ±1% for all energies except the 6 MeV buildup region.
- Lateral profile gamma passing rates exceeded 96.7%; comparisons with PTW microSilicon exceeded 99% agreement for both depth doses and profiles.
- Output factors matched the SNC600c ionization chamber with 0.85% root-mean-square deviation and no significant trend across measured energies or field sizes.
CLINICAL TAKEAWAY
This study supports SunSILICON as a practical detector for relative clinical electron beam dosimetry, including depth doses, lateral profiles, and output factors. The main workflow advantage is direct percentage depth dose measurement without ionization chamber percentage depth ionization conversion. The evidence is technical and detector-specific, so clinics should still commission and validate the detector within their own measurement workflow.