A method of removing at least a portion of a silicon oxide material is disclosed. The reactor building is constructed on the outer circumference of the same footing slab and is also composed of a pair of relatively confronting steel plates and concrete placed in a space between the steel plates. When the operation is complete the dirty tank will contain a solution of solvent infused with essential elements from the plant material. A system is provided that incorporates curvature sensors, a garment for sensing the body position of a person, and a method for registering a patient’s body to a volumetric image data set in preparation for computer-assisted surgery or other therapeutic interventions.