Prostate or bone? Comparing the efficacy of image guidance surrogates for pelvis and prostate radiotherapy using accumulated delivered dose.
Adult
Anatomic Landmarks
Cone-Beam Computed Tomography
Humans
Lymphatic Metastasis
/ radiotherapy
Male
Organs at Risk
/ radiation effects
Pelvic Bones
/ diagnostic imaging
Prostatic Neoplasms
/ radiotherapy
Radiography, Interventional
Radiometry
Radiotherapy Dosage
Radiotherapy, Image-Guided
/ methods
Rectum
/ radiation effects
Retrospective Studies
Urinary Bladder
/ radiation effects
Dose accumulation
Image guidance
Pelvic lymph node
Prostate
Journal
Journal of medical imaging and radiation sciences
ISSN: 1876-7982
Titre abrégé: J Med Imaging Radiat Sci
Pays: United States
ID NLM: 101469694
Informations de publication
Date de publication:
03 2021
03 2021
Historique:
received:
20
08
2020
revised:
30
09
2020
accepted:
02
10
2020
pubmed:
4
11
2020
medline:
29
9
2021
entrez:
3
11
2020
Statut:
ppublish
Résumé
This study assessed the impact of dosimetry to both the target and normal tissue when either bony anatomy (BA) or prostate (PRO) was used as surrogates for image guidance for pelvis and prostate radiotherapy using a dose accumulation process. Thirty patients who were prescribed 50-54Gy to the pelvic lymph nodes (PLN) and 78Gy to the prostate/seminal vesicles were included. Daily acquired CBCTs were rigidly registered to the CT using BA and PRO to simulate two different treatment positions. The accumulated delivered dose (D Prostate was displaced from bony anatomy by > 5 mm in 96/755 fractions (12.7%). Deviation between the mean D The use of either BA or PRO for image guidance could deliver dose to PLN and prostate with minimal deviation from the plan using existing PTV margins. However, deviation for rectum was greater when BA was used.
Identifiants
pubmed: 33139231
pii: S1939-8654(20)30310-6
doi: 10.1016/j.jmir.2020.10.001
pii:
doi:
Types de publication
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
14-21Informations de copyright
Copyright © 2020. Published by Elsevier Inc.