By Barry Press, MD
Attempt to keep the extremity flat, either horizontally or vertically, against the background. A medium blue background is felt to be optimal, but any solid color (e.g. a surgical towel) is satisfactory. If the extremity is away from the background, a shadow may be present from the flash, and it may be difficult to focus only on the area of interest. Filling the viewfinder with the area of interest will minimize both of these problems.
For views of the hand, forearm and fingers, the camera should be oriented horizontally. For orientation, include the wrist with views of the hand, include the elbow and fingertips with views of the forearm, and include the fingertip and the MCP joint with views of the finger.