DOSE UNIFORMITY IN 60CO TOTAL BODY IRRADIATION: MULTIPLE FIELD TECHNIQUE

Authors

  • L. TUNTIPUMIAMORN Division of Radiation Oncology, Faculty of Medicine, Siriraj Hospital, Mahidol University
  • N. DAMRONGKIJUDOM Division of Radiation Oncology, Faculty of Medicine, Siriraj Hospital, Mahidol University
  • M. KHANNALAE Department of Radiation Technology, Faculty of Medical Technology, Mahidol University
  • R. PHUTRAKORNCHAI Department of Radiation Technology, Faculty of Medical Technology, Mahidol University

Abstract

Study of dose uniformity in total body megavoltage photon irradiation ( TBI ) from Cobalt-60 teletherapy machine were undertaken by using LiF Thermoluminescent dosimeter (TLD) and Alderson Rando phantom. Halfbody technique with multiple adjacent direct field technique is used in conjuntion with AP/PA position. The prescribed dose at mid plane of the rando phantom is 1200 cGy. From the study, the variation in dose throughout the whole body of phantom ranges from the lowest dose 967.2 cGy on a mediastinal region to the highest of 1337.5 cGy maximum dose to the area of neck. The measured organ doses are 901.5- 945.4 cGy at lens, 723.8- 890.8 cGy at lungs, 1131.2-1154.8 cGy at kidneys, 1144.7-1186.4 cGy at liver and 1135.3-1181.4 cGy at small intestine. The dosimetry revealed that this technique of TBI deliver a uniform dose to the entire body within ± 7.05% of the dose at the prescription point.

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References

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Published

2023-04-06

How to Cite

1.
TUNTIPUMIAMORN L, DAMRONGKIJUDOM N, KHANNALAE M, PHUTRAKORNCHAI R. DOSE UNIFORMITY IN 60CO TOTAL BODY IRRADIATION: MULTIPLE FIELD TECHNIQUE. ASEAN J Radiol [Internet]. 2023 Apr. 6 [cited 2024 May 14];3(2):219-24. Available from: https://www.asean-journal-radiology.org/index.php/ajr/article/view/389

Issue

Vol. 3 No. 2 (1997): May-August

Section

Original Article

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