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- Title
COMPARISON OF THE PERIPHERAL DOSES FROM DIFFERENT IMRT TECHNIQUES FOR PEDIATRIC HEAD AND NECK RADIATION THERAPY.
- Authors
Masahiko Toyota; Yasumasa Saigo; Kenta Higuchi; Takuya Fujimura; Chihaya Koriyama; Takashi Yoshiura; Suminori Akiba
- Abstract
Intensity-modulated radiation therapy (IMRT) can deliver high and homogeneous doses to the target area while limiting doses to organs at risk. We used a pediatric phantom to simulate the treatment of a head and neck tumor in a child. The peripheral doses were examined for three different IMRT techniques [dynamic multileaf collimator (DMLC), segmental multileaf collimator (SMLC) and volumetric modulated arc therapy (VMAT)]. Peripheral doses were evaluated taking thyroid, breast, ovary and testis as the points of interest. Doses were determined using a radio-photoluminescence glass dosemeter, and the COMPASS system was used for three-dimensional dose evaluation. VMAT achieved the lowest peripheral doses because it had the highest monitor unit efficiency. However, doses in the vicinity of the irradiated field, i.e. the thyroid, could be relatively high, depending on the VMAT collimator angle. DMLC and SMLC had a large area of relatively high peripheral doses in the breast region.
- Subjects
RADIATION doses; RADIOTHERAPY; HEAD &; neck cancer; PEDIATRICS; IRRADIATION
- Publication
Radiation Protection Dosimetry, 2017, Vol 176, Issue 3, p322
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncx013