Current Status of Thermography

Karpman, F.A. Harold L.

doi:10.1177/000331977002100205

Cited by 12 publications

(3 citation statements)

References 38 publications

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“…Thermography has found a definite place in the objective study of the peripheral circulation and is a means of documenting changes in the patient's disease, or evaluating the results of surgical or medical therapy (14). A recent survey made in late 1970 showed that there were approximately 100 thermographic instruments in use in the world.…”

Section: Areas Of Coldness and Sites Of Arterial Obstruction Shown Thmentioning

confidence: 99%

Thermography for Studying Nicotinyl Alcohol Tartrate

Winsor

1975

Angiology

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The first instrument of significance for the measurement of the temperature of the human body was the thermoscope, invented in 1502, probably by Galileo (1). Then followed numerous contributions by Huygens, Dalance, Roemer, Fahrenheit, Celcius, Boerhaave and de Haen, who made many modifications which led to the widespread measurement of temperatures in man. Improvements in the accuracy, types and reproducibility of heat detecting devices have continued through the years. Approximately fifteen years ago Doctor Ray Lawson performed his early investigations in the field of thermography and opened up the newest of the temperature recording techniques using a new device, the Thermograph. The purpose of this paper is to describe the use of the thermograph in the detection and evaluation of diseases of the cardiovascular system. METHOD Thermography is a scanning technique which gives a photographic display of point-to-point temperature differences of the surface of the body. The device consists of an infrared detector which is maximally sensitive to about 10 micron heat waves which emanate from the body. Variations in temperature produce voltage differences through the instrument that are proportional to surface temperatures. The voltage variations activate a light source which is mounted on a scanner; the light is focused on Polaroid film to produce a record in color or black and white. By use of a thermal scan consisting of a series of heat standards of known and constant temperatures, the temperatures of the part under study are determined by comparison of the degree of grayness of color. The device records surface temperatures; however, heat from deep structures such as from pelvic phlebitis, alters the deep and surface temperatures and thus may be recorded. The instrument can be set to detect differences in temperatures as little as 0.1 degree Centigrade which cannot be detected by palpation.Many excellent instruments are now available using color or black and white film which are suitable for static or dynamic studies of the circulation. In many cases moving pictures may be made easily or the picture may be stored, displayed in analog form, played back or computerized. There are many applications of thermography to the study of the circulation by the imaginative investigator.

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Section: Areas Of Coldness and Sites Of Arterial Obstruction Shown Thmentioning

confidence: 99%

Thermography for Studying Nicotinyl Alcohol Tartrate

Winsor

1975

Angiology

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“…Thermography received considerattle attention as a medical diagnostic tool in the late 1960's (1). Engineering applications of thermography began to be seen in the 1970's, with energy conservation (2), electronic circuit quality control (3), and material studies each receiving attention.…”

Section: Introduction S Composite Materials Become More and Morementioning

confidence: 99%

A model of passive thermal nondestructive evaluation of composite laminates

Charles

Wilson

1981

Polymer Composites

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A numerical model of passive thermal nondestructive evaluation (NDE) of composite laminates was developed. This model, based on a transient, three‐dimensional, finite difference solution to the heat conduction equations, can be used to characterize in‐plane defects in the laminates and to predict the laminate response to the thermal test. The model was experimentally verified using two material systems. A parametric study was then conducted to ascertain which variables were critical to the success of passive thermal NDE, and how flaw resolution might be improved.

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“…The forehead thermogram and the heat emission patterns f'rom the standard gray scale were recorded on the same thermogram in order to permit easy comparison. Abnormalities were determined by visual inspection of the thermographic patterns.4~ 5 The nine patients studied were all afflicted with advanced vascular disease and, in fact, two patients had histories of' transient cerebrovascular accidents. The sex, age and medical diagnoses of' each patient are tabulated in Table I.…”

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confidence: 99%

Effect of Papaverine Hydrochloride On Cerebral Blood Flow as Measured By Forehead Thermograms

Karpman

Sheppard

1975

Angiology

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Using the atraumatic diagnostic technique of forehead thermography to indirectly evaluate cerebral arterial circulation, nine patients with vascular disease in the extracranial or intracranial carotid arterial system were given 300 mg. papaverine hydrochloride. All patients demonstrated some degree of improvement after the drug was administered as determined by comparing control thermograms to thermograms obtained 1, 4 and 8 hours after administration of the drug. Improvement was attributed to increased cerebral blood flow due to the direct vasodilating effect of papaverine hydrochloride. In conclusion, this study suggests that if potential stroke victims can be detected at an early stage with thermography (and/or with other atraumatic diagnostic techniques), drug therapy may prove to be of immediate therapeutic value. The response of any given patient to drug therapy may be determined simply and atraumatically by thermographic examinations in which each patient is used as his own control.

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Current Status of Thermography

Cited by 12 publications

References 38 publications

Thermography for Studying Nicotinyl Alcohol Tartrate

Thermography for Studying Nicotinyl Alcohol Tartrate

A model of passive thermal nondestructive evaluation of composite laminates

Effect of Papaverine Hydrochloride On Cerebral Blood Flow as Measured By Forehead Thermograms

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