Hypoxia has a negative effect on anti cancer treatment (8). Radiotherapy is a major treatment modality for advanced cervical carcinomas and requires free radicals from oxygen to destroy target cells, and cells in hypoxic areas were found to be resistant to radiation-induced cell death (9). The gold standard for measuring hypoxia in tumors is the invasive technique of using computerized oxygen-sensitive electrodes. This method is cumbersome and expensive and has not become a general clinical tool for hypoxia measurement (10, 11).