Showing papers on "Thermography published in 1973"

Thermal radiation from animal coats: coat structure and measurements of radiative temperature

Abstract: A theory is developed to describe the transmission of thermal radiation through animal coats containing a uniform distribution of fibres. The theory predicts a dependence of the radiation energy emitted on both the coat structure and the direction of emission, and further suggests that directional radiometers (including thermographic devices) in general measure an effective coat temperature differing from that estimated from the net radiative energy balance.

Breast cancer detection by manual surface temperature detector: Comparison with results of thermography and mammography

Abstract: Breast cancer detection using a manual surface temperature detector, thermography, and mammography was evaluated in a prospective study of 1,000 women. Detection sensitivity was 64%, 78%, and 78% for the manual surface temperature detector, thermography, and mammography, respectively. The corresponding detection specificities were 47%, 56%, and 76%. The combination of both thermography and mammography yielded a 89% detection sensitivity. The manual surface temperature detector was deemed not useful for screening because of its excessively high false-positive and false-negative rates.

Design of a thermal reference system for use in thermography.

Abstract: Increased interest in the use of the scanning infrared camera as both a diagnostic and research tool by the medical profession has led to the need for an external temperature reference. The scanning infrared camera detects the infrared radiation leaving a surface and converts the energy into a visual image which is photographed and termed a thermogram. This paper presents a thermal reference made by constructing an extended surface or fin in such a way as to produce a linear temperature profile down the fin axis. A fin was made following the theoretical model and tested. The resulting fin was quite linear and provides an excellent thermal reference.