Liquid infusion apparatus includes non-magnetic materials in a pumping structure and drive motor therefore, and in a controller that supplies drive signals to the motor to facilitate convenient operation in intense magnetic fields without distorting the magnetic fields and without radiating objectionable radio-frequency interference. The process includes introducing the eviscerated carcass to a cleaning apparatus. At least a portion of the network may be wireless. The cutting blades are aligned so that the harvested bone tissue advances proximally into the lumen of the collection cannula. Methods of applying the dental splint and for securing a broken jaw using the dental splint are also provided. A movement of an object is detected with precision even in an environment where illumination varies, irrespective of the relative position of a ridge line of the object and a border of unit blocks.