ArticleJournal of applied clinical medical physics2026
Clinical evaluation of two new unshielded and shielded silicon diode detectors in external photon beam radiation therapy: SunSILICON and SunSILICON P.
Article in Journal of applied clinical medical physics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Performance evaluation of a new type of commercial silicon detectors for photon beam dosimetry.Journal of applied clinical medical physics · 2026Article
- Clinical application of an unshielded silicon diode detector for relative electron beam dosimetry.Journal of applied clinical medical physics · 2026Article
- Field output correction factors and perturbation factor analysis for novel SunSILICON and SunSILICON P silicon diode detectors.Journal of applied clinical medical physics · 2026Article
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Authors and funding
14 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundAdvanced external photon beam radiotherapy requires dosimetry detectors with high spatial resolution and minimal perturbation effects. Silicon diode detectors are widely used due to their high sensitivity and small sensitive volumes, but fluence perturbation effects and energy dependence can affect performance and depend on detector construction. Shielded and unshielded configurations are used to address these challenges, but their clinical performance and limitations require systematic evaluation. PURPOSE: This study aims to evaluate the clinical performance of two newly developed silicon diode detectors-SunSILICON (unshielded) and SunSILICON P (shielded)-for relative dosimetry in external photon beam radiotherapy. The detectors' response behaviors are compared to established detectors across the full clinical range of field sizes and beam energies, focusing on percentage depth dose (PDD) and lateral beam profile measurements.
methodsPDD and lateral beam profile measurements across the full range of clinical field sizes were performed on Varian TrueBeam and Elekta Versa HD clinical linear accelerators with photon energies ranging from 4 to 25 MV, as well as a Nordion Eldorado 6
resultsSunSILICON and SunSILICON P demonstrated excellent agreement with established detectors within their specified field size ranges. Gamma passing rates exceeded 99% for most comparisons, with minor deviations in large fields or at field size limits. The shielded SunSILICON P showed reduced energy dependence in large fields compared to the unshielded version, while SunSILICON showed superior performance in small fields. Both detectors exhibited minimal angular dependence (<1% for clinically relevant angles) and negligible intra-type variation. The measured EPOMs matched calculated values within uncertainty. The combination of both detectors enables comprehensive coverage of clinical dosimetry needs.
conclusionsSunSILICON and SunSILICON P provide reliable, high-resolution dosimetry for external photon beam radiotherapy across a broad range of clinical scenarios. Their performance is comparable to or exceeds that of established silicon and diamond detectors, with the shielded version particularly suited for larger fields due to its reduced energy dependence. Together, these detectors offer a robust solution for clinical relative dosimetry.
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