Dosimetric comparison of three different treatment techniques in extensive scalp lesion irradiation

Abstract Background and purpose This study compared lateral photon/electron plan (3DCRT), intensity modulated radiation therapy (IMRT) plan, and high dose rate (HDR) brachytherapy plan for total scalp irradiation. Materials and methods The techniques were planned on a patient with squamous cell carc...

Full description

Saved in:
Bibliographic Details
Published in:Radiotherapy and oncology 2009-05, Vol.91 (2), p.255-260
Main Authors: Wojcicka, Jadwiga B, Lasher, Donette E, McAfee, Sandra S, Fortier, Gregory A
Format: Article
Language:English
Subjects:
Aged
Brachytherapy - methods
Head and Neck Neoplasms - radiotherapy
Hematology, Oncology and Palliative Medicine
High dose rate brachytherapy
Humans
Intensity modulated radiotherapy
Male
Mold-based brachytherapy
Radiotherapy Dosage
Radiotherapy Planning, Computer-Assisted
Radiotherapy, Intensity-Modulated - methods
Scalp - radiation effects
Scalp irradiation
Skin Neoplasms - radiotherapy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Background and purpose This study compared lateral photon/electron plan (3DCRT), intensity modulated radiation therapy (IMRT) plan, and high dose rate (HDR) brachytherapy plan for total scalp irradiation. Materials and methods The techniques were planned on a patient with squamous cell carcinoma of the scalp for a prescribed dose of 60 Gy. Conformity indexes and dose volume histograms were used for the comparison. Results Clinical target volume coverage factors for 3DCRT, IMRT, and HDR were 0.976, 0.998, and 0.967, and Conformation Numbers were 0.532, 0.713, and 0.761, respectively. The dose gradient across the target was 59–136%, 91–129%, and 58–242% for 3DCRT, IMRT, and HDR techniques, respectively. The 3DCRT and IMRT techniques produced low optical structure doses. 3DCRT produced hotspots in the brain, while IMRT produced brain sparing. HDR produced the highest integral doses to the brain and optical structures. Conclusions IMRT provided the best target dose homogeneity and coverage, and delivered clinically acceptable doses to normal structures. HDR produced the most conformal plan, but the total dose delivered is limited by doses to the brain and eyes. HDR is a clinically feasible alternative for less extensive lesions, lower prescription doses, and for patients who cannot lie on the treatment table.
ISSN:0167-8140
1879-0887
DOI:10.1016/j.radonc.2008.09.022