Showing papers on "Thermography published in 1974"

Thermography at millimeter wavelengths

Abstract: Radiometer measurements show that the human body emits thermal signals at millimeter wavelengths which can produce a thermographic image potentially useful for detection of "hot spots." The spatial resolution which can be obtained at a frequency of 45 GHz is in the order of 1.3 cm, and the temperature resolution is 0.1 K.

Thermography in Bone Disease

Abstract: SINCE it is crucial both to detect bone tumors at the earliest stage and to accurately delineate the extent of disease, thermography has been investigated in an attempt to determine whether it can contribute to these two pressing clinical needs. Thermography consists of the taking of thousands of measurements of the temperature of extremely small areas of the human body. These are then combined into a picture-like presentation in which higher temperatures appear as correspondingly darker portions of the picture, or thermogram. The measurements are taken by a sensing cell that is placed at some distance from the patient. Accordingly, as a clinical investigative procedure, thermography is especially attractice since it is noninvasive and relatively inexpensive. Malignant Disease Two groups have reported their experience in 23 patients with osteosarcoma. 1,2 Both groups found that all primary malignant tumors yielded obviously abnormal thermographic signs when the patient was first examined. The