Implementation of GaN based real-time source position monitoring in HDR brachytherapy |
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| Institution: | 1. Nuclear Physics Institute of the Czech Academy of Sciences, v. v. i., 250 68 Rez, Czech Republic;2. Department of Physics, Faculty of Science, J.E. Purkinje University, Ceske Mladeze 8, 400 96 Usti nad Labem, Czech Republic;3. Department of Inorganic Chemistry, Institute of Chemical Technology, 166 28 Prague, Czech Republic;4. Peter Grünberg Institut (PGI-9), Forschungszentrum Jülich, D-52425 Jülich, Germany;5. Fundamentals of Future Information Technology, Jülich-Aachen Research Alliance, JARA, D-52425 Jülich, Germany;6. Institute of Ion Beam Physics and Materials Research, Helmholtz Zentrum Dresden-Rossendorf, 01328 Dresden, Germany;7. Institute of Physics of the Czech Academy of Sciences, Cukrovarnicka 10/112, 162 00 Prague 6, Czech Republic |
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| Abstract: | For High Dose Rate (HDR) brachytherapy Quality Assurance (QA), we propose a seed position verification method by using two GaN dosimetric probes integrated in an instrumented phantom. As dose rate measured from one probe is related to the seed distance, seed position inside catheter can be determined. The proposed two-probe method extends measureable range and improves accuracy in comparison with the use of one single probe. One instrumented phantom implementing the method was designed, fabricated and tested in clinical conditions. The measureable range of the two-probe method is 105 mm compared to 36 mm using single probe. The validity of the method was experimentally verified. |
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| Keywords: | GaN dosimetric probe Instrumented phantom Seed position verification Brachytherapy |
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