The treatment of nasopharyngeal cancer mainly relies on radiotherapy. In the past, conventional radiotherapy was used, which is to take a localization film first, and then outline the irradiation range according to MRI of nasopharynx, and then to do the radiotherapy after making a good lead block. However, conventional radiotherapy has many shortcomings: uneven dose distribution within the target area; high dose irradiation of brainstem, spinal cord, parotid gland and other important tissues, heavy acute and chronic reactions, and poor quality of life; high residual rate and local recurrence rate of lesions. In contrast, intensity-modulated radiotherapy uses CT positioning and computer optimization.
Its advantages are: uniform dose distribution in the target area; better protection of the above-mentioned important tissues, high quality of life; good efficacy and relatively long survival time.