Job Description:

• 1) Molds lead blocks to be used as shields in radiation therapy treatments: Lays out x-ray film taken of patient in treatment position and tapes film over grid on lighted table.

• 2) Sets distances on mold cutting machine, duplicating distances from which x ray was taken.

• 3) Calculates required thickness of block, based upon equipment to be used in treatment and applying knowledge of geometry.

• 4) Aligns template and styrofoam piece in blocking tray over x-ray film.

• 5) Guides hand held stylus along lines drawn on x-ray film or print showing area to be treated, simultaneously cutting styrofoam piece with hot wire to form styrofoam mold used in making block.

• 6) Sets mold in vise and tightens metal clamps to hold mold securely in position.

• 7) Pours heated lead alloy into mold to form block.

• 8) Mounts cooled block on lucite board, using screws.

• 9) Installs finished block in tray of machine and views superimposed outline of block on x-ray film to verify accuracy of block and adherence to standards.

• 10) Records patient information on finished block.

• 11) May transport patients to and from treatment area.