An output control apparatus includes a reader for reading, from a storage medium in which image data and image output instruction data are written, the image data and the image output instruction data. The cryogenic catheter defines a catheter lumen and has a distal end placeable at the endoscopic tube distal end. The first chamber communicates with a first inlet, a third inlet, and a first outlet. Accordingly, a receiver adds a component following each received symbol to a delayed-wave component at the head of the received symbol.