The present embodiments describe a magnetically assembled hookah. More particularly, in one aspect the present disclosure is directed toward a patient analysis system for obtaining radiographic images, center-of-balance data, and anatomical positioning data of a patient for use in planning and monitoring the treatment of a patient. The database schema may be a relational star schema as described herein. By sharing the amplifier and obviating the need for a resistance network, the area and overall quiescent current of the system are reduced. Two other elements cause controlled movement of the arm relative to the structure so the surgeon may perform the desired procedure.