| abstract |
An optical viewing device (40,50) includes a housing (2,60) of a size and shape for introduction into the large intestine of a subject and for movement therein in either direction, and an image transducer (5,42,51) located within the housing for converting optical images into electrical signals. Various embodiments are described in which the housing is of a size and shape for movement by its own weight in either direction in the intestine, or in which the housing includes an electric motor (43) driving means (47,48) for propelling the housing (2,60) through the intestine, or in which the housing is carried at one end of a rod (54) of a length such that a user may grasp the opposite end and manipulate the housing to scan the interior surface of the intestine. |