Therefore a fast and effective system for creating a conformal radiation treatment for enlarged (i.e. Radiation therapy is used as part of the treatment in a majority of the cases. Due to the tumor position, the risk of developing lymph node metastases in the neck region is very high. Head and neck cancer accounts for approximately 3% of all cancer cases reported in the United State, or roughly 50,000 cases per year. Malignant tumors in the head and neck represent a great epidemiological problem in western countries. ConclusionsĪlthough not conforming to clinical criteria, the results suggest the technique has promise. The computer generated lymph node regions are evaluated quantitatively and qualitatively. We are also proposing a method that could help us identify the reference models which could potentially produce the best results. Given a set of reference CT images with "gold standard" lymph node regions drawn by the experts, we are proposing an image registration based method that could automatically contour the cervical lymph code levels for patients receiving radiation therapy. The most challenging part of this process is to estimate where there is microscopic spread of disease. Methods that can compute a contour set defining a target volume on a set of patient images will contribute greatly to the success of radiation therapy and dramatically reduce the workload of radiation oncologists, who currently draw the target by hand on the images using simple computer drawing tools. The success of radiation therapy depends critically on accurately delineating the target volume, which is the region of known or suspected disease in a patient.
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