Thermography is a diagnostic technique for measuring blood flow by determining the variations in heat emitted from the body.
A thermogram shows an altered blood supply to the painful area, appearing as a different shade than the surrounding areas of the corresponding part on the other side of the body.
A difference of 1.0°C between two symmetrical body parts is considered significant, especially if a large number of asymmetrical skin temperature sites are present.
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[...] test is available for CRPS, which is diagnosed primarily through observation of the symptoms. Thermography, sweat testing, x-rays, Nerve electrodiagnostics, and sympathetic blocks can be used to build up [...]