Dwell time verification in brachytherapy based on time resolved in vivo dosimetry.
Dwell times
HDR brachytherapy
In vivo dosimetry
Prostate cancer
Treatment verification
Journal
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)
ISSN: 1724-191X
Titre abrégé: Phys Med
Pays: Italy
ID NLM: 9302888
Informations de publication
Date de publication:
Apr 2019
Apr 2019
Historique:
received:
06
12
2018
revised:
22
02
2019
accepted:
29
03
2019
entrez:
20
4
2019
pubmed:
20
4
2019
medline:
21
6
2019
Statut:
ppublish
Résumé
This paper presents a method to verify dwell times during High Dose Rate (HDR) Brachytherapy (BT) by means of in vivo dosimetry (IVD), and reports on an afterloader's stability in dwell time control. In vivo dosimetry was performed during 20 HDR prostate cancer treatments using a point detector based on a radio-luminescence crystal (Al A total of 3518 dwell positions were analysed. The amount of identified dwell positions were 82%, which increased to 89% if the short dwell times (<1 s) were omitted in the analysis. The largest deviation was -0.4 s seen for a single dwell position, and in 97.1% of the cases, the deviations were <0.15 s. The dwell times in BT are well controlled by the afterloader. It is shown that IVD facilitates the detection of dwell time offsets that could have a clinical impact.
Identifiants
pubmed: 31000077
pii: S1120-1797(19)30075-4
doi: 10.1016/j.ejmp.2019.03.031
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
156-161Informations de copyright
Copyright © 2019 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.