Final answer:
In a Gaynor-Hart Carpal Tunnel Projection, you should collimate to the midpoint of the carpal tunnel.
Step-by-step explanation:
In a Gaynor-Hart Carpal Tunnel Projection, you should collimate to the midpoint of the carpal tunnel. The carpal tunnel is a passageway in the wrist that allows the median nerve and tendons to pass through. By collimating to the midpoint of the carpal tunnel, you ensure that the X-ray beam is centered on the area of interest, allowing for clear and accurate imaging of the carpal bones.