Orthovoltage is a type of radiation therapy that has been available for more than 60 years. The X-rays used in this treatment are strong enough to kill cancer cells but do not penetrate more than a few millimeters beyond the surface of the skin, making it an effective treatment for very superficial, small tumors, such as skin cancers and nonmalignant skin conditions including keloids. Orthovoltage is an excellent noninvasive alternative to surgery for skin cancer in sensitive locations, such as the folds of the nose, eyelids or ears.