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Automatic prostate localization on cone-beam CT scans for high precision image-guided radiotherapy.

Authors
  • Smitsmans, Monique H P
  • de Bois, Josien
  • Sonke, Jan-Jakob
  • Betgen, Anja
  • Zijp, Lambert J
  • Jaffray, David A
  • Lebesque, Joos V
  • van Herk, Marcel
Type
Published Article
Journal
International Journal of Radiation Oncology*Biology*Physics
Publisher
Elsevier
Publication Date
Nov 15, 2005
Volume
63
Issue
4
Pages
975–984
Identifiers
PMID: 16253772
Source
Medline
License
Unknown

Abstract

The feasibility of automatic prostate localization on CBCT scans acquired on the treatment machine using an adaptation of the previously developed three-dimensional gray-value registration algorithm, has been validated in this study. Collimating the FOV during CBCT image acquisition improved the CBCT image quality considerably. Artifacts in the CBCT images caused by large moving gas pockets during CBCT image acquisition were the main cause for unsuccessful registration. From this study, we can conclude that CBCT scans are suitable for online and offline position verification of the prostate, as long as the amount of nonstationary gas is limited.

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