Abstract: A system and apparatus for obtaining medical quality images of a body under stress, such as a body in motion, are disclosed. The apparatus preferably consists of a harness into which the imaging device may be removably placed and securely positioned with respect to a body part, even when the body is in motion. The system preferably further comprises a small, light weight gamma camera. The imaging device is preferably supported by a mechanism which is separate from the harness. In each embodiment of the invention, movement of the imaging device relative to the body is minimized, yet the body is permitted to move relatively freely. Methods for use of the apparatus and system to obtain medical images of a body are also described.