Abstract
The purpose of this study was to examine if the use of a bolus helmet when treating
the head with intensity modulated proton therapy (IMPT) will maintain organs at risk
(OAR) sparing while improving the clinical target volume (CTV) coverage. A bolus helmet
is a device that aims to improve on the traditionally used range shifter in proton
therapy by improving dose distribution characteristics. Ten patients were retrospectively
selected who had 2 separate treatment planning scans performed, a scan with the bolus
helmet and a second scan without. Plans were created using both scans. Dose to organs
at risk (OAR) including the left optic nerve, right optic nerve, optic chiasm, and
normal brain minus CTV (brain-CTV), as well as CTV coverage were compared between
the 2 plans. The use of the bolus helmet displayed lower mean OAR doses as well as
higher CTV coverage, suggesting that use of the bolus helmet provides benefit when
treating the head with IMPT.
Keywords
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Article info
Publication history
Published online: May 02, 2022
Accepted:
March 21,
2022
Received in revised form:
March 21,
2022
Received:
December 3,
2021
Identification
Copyright
© 2022 American Association of Medical Dosimetrists. Published by Elsevier Inc. All rights reserved.
