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[Megavoltage cone-beam CT: Recent developments and clinical applications].

Authors
  • Pouliot, J
  • Morin, O
  • Aubin, M
  • Aubry, J-F
  • Chen, J
  • Speight, J
  • Roach, M 3rd
Type
Published Article
Journal
Cancer/Radiothérapie
Publisher
Elsevier
Publication Date
Sep 01, 2006
Volume
10
Issue
5
Pages
258–268
Identifiers
PMID: 16861025
Source
Medline
License
Unknown

Abstract

The Megavoltage cone-beam (MV CBCT) system consists of a new a-Si flat panel adapted for MV imaging and an integrated workflow application allowing the automatic acquisition of projection images, cone-beam CT image reconstruction, CT to CBCT image registration and couch position adjustment. This provides a 3D patient anatomy volume in the actual treatment position, relative to the treatment isocenter, moments before the dose delivery, that can be tightly aligned to the planning CT, allowing verification and correction of the patient position, detection of anatomical changes and dose calculation. In this paper, we present the main advantages and performance of this MV CBCT system and summarize the different clinical applications. Examples of the image-guided treatment process from the acquisition of the MV CBCT scan to the correction of the couch position and dose delivery will be presented for spinal and lung lesions and for head and neck, and prostate cancers.

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