Resumo

KHOO, V.. Utilisation of portal imaging in positional control. Oncología (Barc.) [online]. 2004, vol.27, n.6, pp.23-27. ISSN 0378-4835.

Treatment verification is crucial for precision radiotherapy irrespective of the treatment techniques being used. Current methods of electronic portal imaging has provided quality assured standards in modern radiotherapy. However there are now significant advances in on-line 3D imaging such as kv imagers and cone beam CT acquisition. There is an opportunity to obtain 3-D images with soft-tissue definition at all anatomical sites treated with external beam radiation therapy at acceptably low radiation doses. Image quality will be dependent on tumour site and dose delivered. There is much on-going work in optimizing image capture using this new technology. This technology has the potential for optimising generic population margins, customising and adapting treatments for individual patients, and accurate verification of complex treatment delivery. This technology may revolutionise current quality assurance programs and permit the development of new protocols for adaptive, predictive, gated or tracking in radiotherapy.

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