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Communication Dans Un Congrès Année : 2004

Usefulness of image morphing techniques in cancer treatment by conformal radiotherapy

Résumé

Conformal radiotherapy is a cancer treatment technique, that targets high-energy X-rays to tumors with minimal exposure to surrounding healthy tissues. Irradiation ballistics is calculated based on an initial 3D Computerized Tomography (CT) scan. At every treatment session, the random positioning of the patient, compared to the reference position defined by the initial 3D CT scan, can generate treatment inaccuracies. Positioning errors potentially predispose to dangerous exposure to healthy tissues as well as insufficient irra- diation to the tumor. A proposed solution would be the use of portal images generated by Electronic Portal Imaging Devices (EPID). Portal images (PI) allow a comparison with reference images retained by physicians, namely Digitally Reconstructed Radiographs (DRRs). At present, physicians must estimate patient positional errors by visual inspection. However, this may be inaccurate and consumes time. The automation of this task has been the subject of many researches. Unfortunately, the intensive use of DRRs and the high computing time required have prevented real time implementation. We are currently investigating a new method for DRR generation that calculates intermediate DRRs by 2D deformation of previously computed DRRs. We approach this investigation with the use of a morphing-based technique named mesh warping.
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Dates et versions

hal-01589719 , version 1 (18-09-2017)

Identifiants

  • HAL Id : hal-01589719 , version 1

Citer

Hussein Ataoui, David Sarrut, Serge Miguet. Usefulness of image morphing techniques in cancer treatment by conformal radiotherapy. SPIE Medical Imaging : Visualization, Image-Guided Procedures, and Display, May 2004, San Diego, United States. pp.332-340. ⟨hal-01589719⟩
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