________ is one type of radiation therapy, done as an outpatient procedure that allows deep penetration without damaging superficial tissues and is used primarily for deep tumors.

Teletherapy

A radiation therapy technique that allows deeper penetration than brachytherapy; used primarily for deep tumors.

Radiation Therapy

The use of X-rays and radioactive substances to treat cancer.

Deep Tumors

Cancerous growths located deep within the body that may be hard to detect and treat.