Methods and apparatus related to correcting errors are disclosed. The composition comprises one or more biodegradable block copolymer drug carriers; and a reconstitution enhancing and enabling agent comprising polyethylene glycol, a PEG derivative or a mixture of PEG and a PEG derivative. A differential signal comparison unit receives image information value and the reset information value, compares the two values, and outputs a difference value therebetween. In an embodiment, supporting components are solid-state devices powered by a low voltage on-board power supply, providing for use in environments where voltage levels may be restricted.