A breast tomography scanner including a stationary chamber configured to hold fluid, a movable chamber within the stationary chamber configured to hold fluid, and breast scanning apparatus. The integrated circuit comprises an audio output port having a first and a second output terminal for connection to a first and a second input terminal, respectively, of a speaker. Some embodiments include validating operation of the at least one responder data point by monitoring sensor data associated with the at least one responder data point and the at least one predictor data point.