Emissivity of Human Skin in vivo between 2.0µ and 5.4µ measured at Normal Incidence

摘要: THE discovery1 that the temperature of skin overlying malignant tumours is frequently raised has led to an increasing medical interest in thermal patterns over surface body. Attempts2,3 using infrared scanning devices (‘Aga’ scanner, Bofors Thermograph, and Pyroscan) have subsequently been made identify pathology underlying terms differences at surface. Thermal scanners measure energy (Q) emitted by Consequently can reflect not only variations but also changes emissivity (e). Unfortunately, there conflicting evidence on magnitude e. Hardy Muschenheim4 concluded dead should be regarded as a black body (e = 1). While this conclusion justified when Q total received all wavelengths (λ) it necessarily applicable range 2µ < λ 5.4µ which detectors used these are sensitive. More recent measurements5 show post-mortem samples varies rapidly with λ. It clear, however, whether values e so obtained compared measured vivo.