In one aspect, an apparatus for performing chemical exchange saturation transfer magnetic resonance imaging on a region of an object being imaged is provided. The die found not to be defective is partially removed in sequential manner to allow the next higher die to be tested. The system may also include a first multiplier circuit that generates a first intermediate signal by multiplying the first and second logic levels of the digital signal by a first multiplier. The warmer further comprises a heating element which is disposed within the housing to provide heat to the tank assembly.