An image-based notion for therapeuticplanar organ activity dosimetry in a developing country: Masterdose software
Bronwin Van Wyk1, Francis Hasford, Nozipho Nyakale
1Sefakon Makgatho University, Department of Medical Physics, Pretoria, South Africa. bronwin.vanwyk@smu.ac.za.
Objective:
Planar dosimetry is often performed in developing countries due to its simplicity during basic quantitative dosimetry. The geometric mean method is often used during planar dosimetry and imaging counts can be corrected for background, attenuation and scatter. The aim of our study was to develop computerized software called Masterdose that may be used for therapeutic isotope planar organ personalized dosimetry.
Materials And Methods:
Masterdose software uses various methods to correct for background, scatter and attenuation.We also introduced a method to convert imaging counts to activity on the software,which is Java based and runs on Windows, Linux and Macintosh platforms.
Results:
Three user interfaces named image processing, quantification and dosimetry were developed for the software. Masterdose could quantify kidney and liver doses of lutetium-177-DOTA-0-Tyr3-octreotate (177Lu-DOTATATE) patients. The software was validated throughcalculation of the kidney and liver doses of ten neuroendocrine tumour patients (NET) treated with 177Lu-DOTATATE.
Conclusion:
Masterdose presents an option for planar quantification that can be used as a quality control tool to verify imaging counts and perform dosimetry in particular organs.
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