1. A diagnostic and teaching aid including: a. means for displaying images; b. means for selecting portions of the images via gestures of a diagnostician; c. means for recording commentary of the diagnostician occurring concurrently with the image portion selection and linking the commentary to the selected image portions; d. means for recording the sequence of image portion selection and commentary to create a teaching session; and e. means for indexing at least one of the commentary and the selected image portions.