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KMID : 1164220050170020133
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Journal of Korean Society for Radiotherapeutic Technology
2005 Volume.17 No. 2 p.133 ~ p.140
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Evaluation of Usefulness on In-vivo Diode Dosimetry for Measuring the Tumor Dose of Oral Cancer Patient
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Na Kyoung-Su
Lee Je-Hee
Park Heung-Deuk
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Abstract
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Purpose : This test is designed to identify the validity of treatment plan by implementing real-time dosimetry by means of dose that is absorbed into PTV and OAR when preparing doses of 3D and POP plans.
Materials and Methods : In treatment. error can be calculated be comparing Exp. Dose with the actual dose, which has been converted from ’the reading value obtained by placing diode detector on the area to be measured’. Same test can be repeated using Alderson-Rando phantom.
Results : Errors were found: A patient(POP plan): 197.6/199=-1.2%, B patient(3D-plan): 199.9/198.7=+0.6%, C patient: 196/200=-1.5%. In addition, considering the resulted value of measuring OAR besides target-dose for C patient showed 96/200, representing does of 47%, the purpose of protection was judged to be duly accomplished. Also it was acknowledged the resulted value of -3.7% met the targeted dose within the range of .
Conclusion : Aimed for identifying the usefulness of pre-treatment dose measurement using diode detector, this test was useful to evaluate the validity of curing because it resulted in the identification of category to be protected as well as t dose. Moreover, it is thought to have great advantage in ascertaining the dose of target, dose of which is not calculated yet. Similar to L-gram before treatment, this test is thought to be very effective so that it can bring great advantages in the aspects such as validity of curing method and post-treatment plan as well.
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KEYWORD
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in-vivo diode dosimetry, diode
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