National Geographic : 1971 Aug
XODACHROMES (g N.G.S. Heat warns of danger in the diagnostic work of Dr. Jo Anne Haberman at the Uni versity of Oklahoma Medical Center. Using an infrared scanner, which records skin temperatures in varying colors, Dr. Haberman makes a thermogram, or heat pic ture, of a woman suspected of having cancer. Cancerous growths show up as hot spots. This detection technique proves 90 percent accurate. On a human hand (below) a thermogram captures the dramatic loss of heat caused when a subject smokes only half a cigarette. Showing as a warm orange before the experiment, the hand registers greens and blues when smok ing starts. Dark blue at the fingertips represents a tem perature drop of seven de grees. This tells Dr. Haber man that the nicotine has constricted the blood vessels, curtailing the flow of blood. Throughout Oklahoma, medicine has made giant strides. At the Central State Hospital in Norman, chief mental institution in Okla homa, the average stay now totals 28 days, compared to eight years only two decades ago. State mental-health teams and tribesmen collabo rate in bringing psychiatric help to Choctaws. And medi cine even rides the range: Cowboys seek out sick cattle and give them injections on the spot.