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The effect IMRT technique by the head and neck tumors looking on the total dose in the organs at risk and the target volumes
WOLFOVÁ, Barbora
The effect IMRT technique by the head and neck tumors looking on the total dose in the organs at risk and the target volumes This work compares two techniques of planning radiotherapy in the head and neck areas. The technique used will be IMRT - Intensity Modulated Radiotherapy. The development of new technologies in radiotherapy equipment has also brought a wider range of methods of treating carcinomas. The IMRT technique represents a breakthrough in this process and that is why it is dealt with in this work as far as its advantages, as compared with conventional radiotherapy methods, are concerned. I have focused mainly on the distribution of doses in target volumes and critical organs, in particular in the salivary glands and the spinal chord. The region of the head and throat is an area containing the kinds of tissue with various sensitivity and tolerance to radiotherapy. The damage to such tissues has an enormous impact on the patient. That is why the region is a very suitable place for assessing the advantages of the IMRT as compared with conventional techniques. Ten plans from a set of patients suffering from tumour in the area of head and throat have been evaluated in this work by means of DVH (Dose Volume Histogram). The individual plans have been interpreted, conventional plans and IMRT ones separately. I have focused on comparing mean doses and the subsequent comparison of doses of 5 per cent and 95 per cent of the irradiated volume PTV, maximum doses on the spinal chord, and doses of 50 per cent of the irradiated volume of the salivary glands in the individual plans.

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