Open AccessThe establishment of the national dose reference level (DRL) for head-CT examination in Indonesia
Author(s) -
Sera Budi Verinda,
Khoirul Anam,
Asep Yoyo Wardaya,
Rusmanto Rusmanto,
Ida Bagus Gede Putra Pratama
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1505/1/012047
Subject(s) - quartile , medicine , contrast (vision) , radiological weapon , nuclear medicine , outlier , statistics , radiology , mathematics , computer science , artificial intelligence , confidence interval
The dose reference level (DRL) is one of the tools for dose optimization in every radiological practice. However, Indonesia does not have a national DRL for CT which can be adopted nationally to date. This research was aimed to develop the national DRL for the head CT examination. There were 636 survey booklets with 20.211 patient data. All data then were classified into contrast and non-contrast parameters. Outliers data were removed from the data list by z-score. MATLAB R2017b was used to determine minimum, maximum, the first, second and third quartile values. The third quartile of data was identified as the DRL value. It was found that national DRLs in terms of CTDIvol, DLP, and effective dose were 60 mGy, 1,811 mGy-cm, and 3.8 mSv for the contrast parameter, and 61 mGy, 1,350 mGy-cm, and 2.8 mSv for the non-contrast parameter. National DRL values for males and females show the same value when stated in CTDIvol. Meanwhile, the national DRL value for males is greater than that for females when expressed in DLP and effective dose. These results are consistent with the differences in head size that is relatively larger in males than in females.