The Leksell Gamma Knife®, developed by Professor Lars Leksell of the Karolinska Institute in Stockholm, Sweden, is a revolutionary non-invasive tool used in the treatment of intracranial benign and malignant tumors, vascular malformations and certain functional disorders. By minimizing surgical risk and reducing hospitalization, the Leksell Gamma Knife truly increases the quality of life for the patient.

The Leksell Gamma Knife works by delivering a single, high dose of ionizing radiation, emanating from 201 cobalt-60 sources. Each narrow beam is focused on the target which is defined by means of MR, CT and/or angiographic imaging and the system's exclusive three-dimensional treatment planning software, Leksell GammaPlan®. At the target - where all 201 beams converge - enough radiation is delivered to treat tissue within the target volume, while sparing adjacent, normal tissue from clinically significant radiation. Based on over 30 years of clinical results, Gamma Knife Surgery has become the treatment of choice for selected indications. These indications include small to medium-sized well-circumscribed lesions, where the Leksell Gamma Knife is used as either the sole treatment or as an adjunct to conventional surgery and/or radiotherapy.