Abstract
In radiotherapy treatment it is very important to find out the target organs on the medical image sequence in order to determine and apply the proper dose. The techniques to achieve this goal can be classified into extrinsic and intrinsic. Intrinsic techniques only use image processing with medical images associated to the radiotherapy treatment, as we deal in this chapter. To accurately perform this organ tracking it is necessary to find out segmentation and tracking models that were able to be applied to several image modalities involved on a radiotherapy session (CT , MRI , etc.). The movements of the organs are mainly affected by two factors: breathing and involuntary movements associated with the internal organs or patient positioning. Among the several alternatives to track the organs of interest, a model based on geodesic active regions is proposed. This model has been tested over CT images from the pelvic, cardiac, and thoracic area. A new model for the segmentation of organs composed by more than one region is proposed.
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Acknowledgments
This work has been partially supported by the Spanish Ministry of Education and Science and the European Union (via ERDF funds) through the research project TIN2007-67474-C03-03, by the Consejería de Innovación, Ciencia y Empresa of the Junta de Andalucía through the research project P06-TIC-01403, and by the University of Jaén through the research project UJA-08-16-02.
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Martínez, A., Jiménez, J.J. (2009). Tracking Organs Composed of One or Multiple Regions Using Geodesic Active Region Models. In: Magnenat-Thalmann, N., Zhang, J., Feng, D. (eds) Recent Advances in the 3D Physiological Human. Springer, London. https://doi.org/10.1007/978-1-84882-565-9_3
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