The thermograph, in principle, is only a super-sensitive sister of one of medicine's most familiar instruments, the thermometer.
Perhaps 30 of the instruments, costing approximately $26,000 to $30,000 each, are now being used in the US, said Travis Winsor, MD. Ten more are in service at European institutions.
Thermography is based on ability of the device to detect heat differences to a tenth of a degree centigrade. "This is at least ten times better than the average physician could do with his hand," the Los Angeles clinician commented.In operation, the area to be investigated is placed under the scanner. Distance between scanner and object is governed by the size of the area under investigation.As scanning begins, a dot of light can be seen moving back and forth across the skin surface. It resembles the tiny shaft of light remaining on a TV screen just after the set