“…Accuracy in diagnosis of 85-95 per cent has been claimed in thyroid disease (Samuels, rg7za); 90 per cent in parathyroid disease (Samuels, 1972b); 94.5 per cent in the localization of perforating veins (Patil, Williams, and LloydWilliams, 1970), and 88.6 per cent in carotid artery occlusion (Capistrait, 1971). Claims as to the place of thermography in the diagnosis of breast carcinoma have ranged from the enthusiastic (accuracies of IOO per cent (Swearingen, 1965) and 87 per cent (Wallace and Dodd, 1968)) to the guarded (accuracy of 53 per cent (Furnival, Stewart, Weddell, Dovey, Granville, Evans, and Forrest, 1970)). It is significant that diagnostic accuracy has been found to be always greatest in situations where difference in infra-red emission could not be obscured by variable subcutaneous fat insulation.…”