A system and method may allow editing of an image stream, which may be produced by, for example, an ingestible capsule. First and second light detectors measure light intensities in the first and second diffusive materials respectively. The circuit can generate a synchronous clock signal and decode a received data signal so as to be compatible with ISOIEC 14443 Type A protocol, based on the received radio frequency signal transferred from a card reader. Moreover, the counselor component can dynamically generate a second question directed toward the medical professional based upon at least one of the answer or a value of information computation.