Skip to Main content Skip to Navigation
Journal articles

Calcul de dose à partir d’images Cone Beam CT : état de l’art

Abstract : In external beam radiotherapy, the dose planning is currently based on computed tomography (CT) images. A relation between Hounsfield numbers and electron densities (or mass densities) is necessary for dose calculation taking heterogeneities into account. In image-guided radiotherapy process, the cone beam CT is classically used for tissue visualization and registration. Cone beam CT for dose calculation is also attractive in dose reporting/monitoring perspectives and particularly in a context of dose-guided adaptive radiotherapy. The accuracy of cone beam CT-based dose calculation is limited by image characteristics such as quality, Hounsfield numbers consistency and restrictive sizes of volume acquisition. The analysis of the literature identifies three kinds of strategies for cone beam CT-based dose calculation: establishment of Hounsfield numbers versus densities curves, density override to regions of interest, and deformable registration between CT and cone beam CT images. Literature results show that discrepancies between the reference CT-based dose calculation and the cone beam CT-based dose calculation are often lower than 3%, regardless of the method. However, they can also reach 10% with unsuitable method. Even if the accuracy of the cone beam CT-based dose calculation is independent of the method, some strategies are promising but need improvements in the automating process for a routine implementation.
Document type :
Journal articles
Complete list of metadatas

Cited literature [80 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01718028
Contributor : Laurent Jonchère <>
Submitted on : Thursday, May 3, 2018 - 11:02:33 AM
Last modification on : Friday, October 23, 2020 - 4:35:38 PM
Long-term archiving on: : Tuesday, September 25, 2018 - 4:26:01 PM

File

Manuscrit_dose CBCT_CANRAD_fin...
Files produced by the author(s)

Identifiers

Citation

A. Barateau, M. Céleste, C. Lafond, O. Henry, S. Couespel, et al.. Calcul de dose à partir d’images Cone Beam CT : état de l’art. Cancer Radiothérapie, Elsevier Masson, 2018, 22 (1), pp.85-100. ⟨10.1016/j.canrad.2017.07.050⟩. ⟨hal-01718028⟩

Share

Metrics

Record views

319

Files downloads

216