2-Dimensional IMRT dose audit: An Indonesian multicenter study

Ida Ayu Putu Inten Gayatri, Andrian Dede Handika, Wahyu Edy Wibowo, Aninda Fitriandini, Muhamad Fadli, Aloysius Mario Yudi Putranto, Dewa Ngurah Yudhi Prasada, Anisza Okselia, Suharsono, Supriyanto Ardjo Pawiro

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1 Citation (Scopus)


Intensity modulated radiation therapy (IMRT) is an advanced technique in radiation therapy delivery. IMRT depends on the accuracy of the multileaf collimator during treatment. Hence, the actual dose distribution can deviate from the treatment planning system's calculation. This study aimed to perform a multicentre planar dosimetry audit of radiotherapy centres in Indonesia, using the structure sets from AAPM TG-119. The gamma index used to evaluate the dose distribution was 3%/3 mm and 3%/2 mm. We observed 100% gamma index passing rates mostly in the 3%/3 mm evaluations. The gamma index passing rates dropped in the 3%/2 mm analysis. Most of the radiotherapy centres participating in this audit satisfied each criterion's tolerance limit of the action level. This study may become a first result for the next multicenter IMRT audit by using a standardized protocol.

Original languageEnglish
Article number110415
JournalApplied Radiation and Isotopes
Publication statusPublished - Oct 2022


  • AAPM TG-119
  • Dose audit
  • Gamma index analysis
  • IMRT
  • Passing rate


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