An imaging bed for use with test subjects that keeps the subject sedated and warm throughout the imaging process. In embodiments, the bed uses radiant heating or cooling by pushing a heated or chilled fluid through the bed to control the temperature of the test subject during the imaging process. The imaging bed can also incorporate an integrated anesthesia channel. In embodiments, an exhaust channel removes the cool air, as well as the unused anesthesia from the imaging bed though an exhaust port. Various embodiments include a docking mechanism for easy connection of anesthesia to the bed, as well as an adapter for fitting smaller or multiple subjects simultaneously within the imaging bed.