Patent Number: 
Section: claims

1. A radiation case, comprising:(a) a radiation-proof door; and(b) a radiation-proof main section, the radiation proof main section comprising a back portion, a floor portion, a ceiling portion and side portions, vertical cavities formed in the back portion, the vertical cavities being a selected distance from a surface of a back wall of the back portion, radiation rods located in the vertical cavities, each radiation rod containing a cobalt-60 pellet, the selected distance between the vertical cavities and the surface of the back wall of the back portion being less than a maximum penetration distance for gamma rays coming out of each cobalt-60 pellet. 2. A radiation case, comprising:(a) a lead door; and(b) a lead main section, the lead main section comprising a lead back portion, a lead floor portion, a lead ceiling portion and lead side portions, vertical cavities formed in the lead back portion, the vertical cavities being a selected distance from a surface of a back wall of the lead back portion, radiation rods located in the vertical cavities, each radiation rod containing a cobalt-60 pellet, the selected distance between the vertical cavities and the surface of the back wall of the lead back portion being less than a maximum penetration distance for gamma rays coming out of each cobalt-60 pellet. 3. A radiation case, comprising:(a) a lead door; and(b) a lead main section, the main section comprising a lead back portion, a lead floor portion, a lead ceiling portion and lead side portions, vertical cavities formed in the lead back portion, the vertical cavities being a distance of 0.2 centimeters from a surface of a back wall of the lead back portion, radiation rods located in the vertical cavities, each radiation rod containing a cobalt-60 pellet. 4. The radiation case of claim 1, a channel being in the side portion of the radiation-proof main section, an electrical cable and a vacuum hose passing through the channel.