​Dr. Cynthia Brown, Breast Cancer Oncologist briefly explains the vascular physiology and why hot spot evaluation is vital for an accurate scan. 

In this video cool air is used. Today we choose to perform the autonomic challenge (cold stress test) perfected by Therma-Scan Reference Laboratory for decades. By utilizing hands in cold water to create a physiological change in the breast tissue (contraction of healthy blood vessels) it can differentiate healthy blood vessels from those that grow to feed a tumor (unhealthy or lacking muscle lining and thus lacking in contraction with cold challenge). The principle is still obviously vital with either method. With the addition of the cold stress test it is obvious why Therma-Scan is the world's leader in breast thermography.