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Printed circuit board (PCB) hidden defect analysis from thermographic testing data during their quality control or production may help manufacturers investigate and understand why it actually failed. A significant problem, unexplored in depth is the impact of the shape of the hidden defects on the possibility of their correct quantitative characterization. This article examines the impact of the form of hidden manufacturing defects of PCBs on their detection and evaluation using flash, transient and lockin thermography. The influence of the defect shape on information characteristics of quantitative thermography has been studied through thermal modeling and simulation, as well as by real active thermography measurement.

This work aims at estimating the on-service three-phase induction motor efficiency using the temperature data from the infrared thermography, which assumes that all the losses of the motor are dissipated as heat. The proposed technique is compared to the quantitative thermography method and the on-service particle swarm optimization method. Results have been tested on 16 motors in the real condition.

Summary form only given. The needs of the space program for quantitative thermography is reviewed and the implications of NASA's advanced development work in thermography and its relationship to human perception and clinical diagnostics are discussed, with emphasis on image information processing capabilities of representative observer vision systems. Areas in which further work is needed are identified. >

Significant new technological advances in biomedical engineering in detector material, staring focal plane array (SFA) sensors, integrated circuits, and high performance photon detectors such as mercury-cadmium-telluride (MCT) operating in the 70 K to 120 K temperature range enable the clinician in medicine to "see more". With third generation technology coupled with concomitant advances in biological medicine in gene, receptor specific, and enzymatic molecular medicines, interventional quantitative thermography enables a better understanding of interactive thermal pattern recognition in neuropathic, myopathic, angiopathic and scleropathic syndromes as aides in diagnosis and monitoring treatment in pain management. As a result of these advances, we can now demonstrate two types of interventional computerized thermal imaging: (1) chemically mediated-receptor specific; and (2) peripheral neuropathic localization of the somato-autonomic thermatome. This study focuses on new medical applications of these techniques, and reviews the clinical physiology mediated by interventionally monitored digitalized infrared thermal imaging (DITI).

Paget's disease of bone, identified over 200 years ago, is characterised by altered bone metabolism, increased heat and bending of long weight bearing bones such as the tibiae. Infrared thermography is an efficient means of monitoring the temperature changes over actively diseased bone. Fundamental studies to determine the cause of temperature changes have been made, using a mathematical model of heat flow in the tibia. These indicate that high osseous vascularity is the major cause of the temperature increase. Changes in temperature often precede clinical response to treatment or remission. A series of case studies using Calcitonin, and also Etidronate therapy for periods up to 4 years, have been recorded using a thermal index. Quantitative thermography is the ideal means for monitoring the progress of the disease and its treatment.