Source of Support: None, Conflict of Interest: None
Cancer oesphagus is the most common but the most lethal carcinoma found in this part of the country. About 46% of the cases planned for radiotherapy belong to this category. The most common physical parameter of these patients were recorded and studied. 15 cm x 8 cm is the most common field size and patient separation varies from 17 cm-20cm. The NSD varies from 1019 to 2116 rets without any complications. These results are useful for preparing the most appropriate data necessary for the planning of these patients. These can also be used by other developing centers which do not possess the facilities like simulator, isodose plotter, TPS etc. In the absence of the above equipment these results serve as a guide for the purpose of radiotherapy of patients which is expected to be close to correct dose delivery.