Patent ID: 7659530
Filing Date: 2010-02-09
Classification: A61N

Abstract:
1. A focusing and shielding device for an encephalic photon knife, comprising a ray source body, a switch and an armet; said ray source body being a hemispherical shell with a certain thickness having a ray source cavity for placing a ray source and a pre-collimation hole for collimating a ray; said ray source cavity being defined on an outer surface of the hemispherical shell, and said pre-collimation hole being defined on an inner surface of the hemispherical shell and connected with said ray source cavity; said switch is defined inside the body of said ray source, and an outer surface of said switch being hemispherical shape, a middle collimation hole being set on the switch; said armet being deposited inside said switch, an inner surface of said armet is in a columnar shape, an end collimation hole being defined on said armet; a therapy path being defined when said middle collimation hole connecting said pre-collimation hole with said end collimation hole together.