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Comparing the results of 3D treatment planning and practical dosimetry in craniospinal radiotherapy using Rando phantom
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H.R. Baghani   , S.M.R. Aghamiri , H. Gharaati , S.R. Mahdavi , S.M. Hosseini Daghigh |
| , Hamidreza.baghani@gmail.com |
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Abstract: (18753 Views) |
| Background: Craniospinal radiotherapy faces
technical challenges which are due to the sensitivity
of the location in which the gross tumor is, and to
organs at risk around planning target volume. Using
modern treatment planning systems causes a
reduction in the complexities of the treatment
techniques. The most effective method to assess the
dosimetric accuracy and the validity of the software
used for treatment planning is to investigate the
radiotherapy and treatment planning by means of a
anthropomorphic Rando phantom which was used
here for treatment planning and practical dosimetry
for craniospinal radiotherapy. Studying the absorbed
dose by the organs at risk was the secondary
objective discussed in this paper. Materials and
Methods: Treatment planning in craniospinal
radiotherapy was done using CorePlan 3D treatment
planning software. Radiotherapy was administered on
a anthropomorphic Rando phantom and practical
dosimetry was done using GR-200 TLDs. Varian
Clinac 2100C/D was used for radiotherapy. Results:
The absorbed dose by regions of interest was
separately calculated for treatment planning and
radiotherapy. Except the conjunction areas of the
cranial and spinal radiation fields, the difference
among the results was not more than 5%. Full
comparison of the results for each part has been
presented. Conclusion: The comparison the results of
practical dosimetry and treatment planning software
supports the validity of CorePlan treatment planning
system. Also analysis of the absorbed dose through
organs at risk showed that the absorbed dose by
organs at risk have an acceptable value with respect
to tolerance dose of these organs. The only unacceptable
result was related to thyroid. Iran. J. Radiat. Res.,
2011 9(3): 151-158
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| Keywords: Craniospinal radiotherapy, rando phantom, thermoluminescence dosimetry, treatment planning |
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Full-Text [PDF 542 kb]
(3048 Downloads)
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Type of Study: Original Research |
Subject:
Radiation Biology
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