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Why use IMRT?
• Improve conformity with target dose, e.g. prostate
cases with hip prosthesis
• Reduce irradiation of normal tissues e.g. parotid
glands and spinal cord in head and neck cases
• Facilitate dose escalation e.g. prostate and head and
neck cases
• Treat concave structures to a high dose, for example,
nasopharyngeal cases