A useful tool to facilitate consistent body position and posture, and to eliminate hand movement during scanning is to use a Stability Aid.
A scanning Stability Aid should be 800mm (32 inches) long and have a diameter of 6mm (1/4 inch). A metal rod is ideal for this purpose and can be fitted with handles at each end.
When scanning, stand in a relaxed A pose, hold the Stability Aid at each end and allow it to rest lightly on the thighs. This will create a uniform and optimal separation of the hands from the hips, and eliminate any movement of the lower arms and hands that may otherwise have an adverse effect on the scan.