Computerized information processing methods for processing data from a medical device, such as an ingestible probe. In one embodiment, the method includes processing data obtained by the probe so as to produce a plurality of image frames, and further processing the frames to identify a plurality of frames of potential interest to a reviewer, and using the identified frames to form a preview of the entire data set. In one implementation, the processing of the data includes identification of one or more artifacts or shapes within the data associated with a medical condition, and selection of the frames for the preview includes those frames with the identified artifacts or shapes.