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At least 415 records · Page 23Linked to original sources
PubMed1991

Use of thermography for initial detection of early reflex sympathetic dystrophy.

Reflex sympathetic dystrophy is one of a complex of overlapping, sympathetically maintained pain syndromes which are usually initiated by a minor injury that resolves quickly but leaves behind a persistent pain that generalizes to much or all of the limb. The pathophysiology of reflex sympathetic dystrophy is reviewed to show that the pain is accompanied by cooling of the limb, beginning with the distal end and gradually progressing throughout. Thermography is shown to be an effective way to monitor near-surface blood flow in the limbs and to be sensitive to changes accompanying painful conditions. The usefulness of this technique for early detection of reflex sympathetic dystrophy is demonstrated and illustrated with several examples.

Adolescent↗
PubMed1988

Staging and follow-up of rheumatoid arthritis of the knee. Comparison of sonography, thermography, and clinical assessment.

Twenty patients with longstanding polyarticular rheumatoid arthritis (including knee involvement) were selected for this study. The severity of the knee synovitis was assessed before and during treatment (with intra-articular corticosteroid injections) using clinical scores, sonography, and thermography. In all patients, the inflammation regressed during treatment. During follow-up, the quantity of synovial fluid, as measured sonographically 10 days after the start of therapy, correlated best with the clinical status. Maximal regression of synovial thickening was noted on delayed sonograms performed three months after treatment. Thermographic peak temperature showed good correlation with the clinical status, but the thermographic index was unreliable.

Adrenal Cortex Hormones↗
PubMed1992

Evaluation of port wine stain perfusion by laser Doppler imaging and thermography before and after argon laser treatment.

Thirteen patients with port wine stains (PWS) were treated with argon laser therapy. Before and at different points in time following treatment, skin blood perfusion and temperature were mapped with laser Doppler imaging and thermography. In nine patients no elevation in blood perfusion was observed in the PWS in comparison with the surrounding normal skin before treatment. In the remaining four patients a significantly (p less than 0.01) higher blood flow was recorded within the PWS. Immediately after treatment nine patients showed elevated perfusion within the PWS. During the first two days following treatment, all patients showed a gradually decreasing hyperperfusion in the borderline between the PWS lesion and surrounding skin. Immediately after treatment 10 patients had a significantly (p less than 0.01) higher temperature in the PWS than in normal skin. During the first 24 h following treatment, an elevated perfusion was in general accompanied by a tissue temperature increase. Three and a half months after argon laser treatment, three patients showed excellent clinical results with no remaining PWS spots or scarring. Two of these patients had had both elevated perfusion and temperature in the PWS prior to treatment.

Adolescent↗
PubMed1976

[Improvement of the patch-test reading through contact thermography].

The evaluation by contact-thermography (with heat sensitive cholesterinester crystals) of patch tests for contact dermatitis is an important aid to detect weak positive or false negative reactions. In addition, it facilitates the interpretation of patch tests in dark skin persons. The number of diagnosed cases of contact dermatitis can be increased by about 10% without increasing the expenditure of time on the part of the patient or the physician.

Dermatitis, Contact↗
PubMed1975

[The basis of tumor verification using thermography].

The gradient between interior body temperature and external temperature was gradually measured in young pigs, since their skin resembles the properties of human skin. The interior temperature appeared to extend to 2.5 cm under the surface of skin. Then it drops, at first slowly and from 1 cm under the surface rapidly. Tumors or inflammations can only warm the skin directly when their site is 1 cm or less under the skin. Tumors which lie deeper may warm the skin via reflex zones. Warming by heat conduction is prevented by convection. Heating plates inserted 1.8 cm and 2 cm under the skin surface and heated 5 degrees beyond surrounding temperature do not warm the skin surface. This can be demonstrated by thermography. The importance of these results for thermographic tumor diagnosis is discussed.

Animals↗
PubMed1975

Orthopedic applications of liquid crystal thermography.

Liquid crystal thermography can assist the clinician in evaluating inflammatory conditions or delineating viability of tissues by the differences in coloration that occur with the use of these unique substances. The technique has proved useful in studying hemophilia, tumors of the extremities, arthritis and vascular conditions, including the complications of diabetes.

Arthritis↗
PubMed2001

Multiple-probe thermography for estimating the postmortem interval: I. Continuous monitoring and data analysis of brain, liver, rectal and environmental temperatures in 117 forensic cases.

One hundred seventeen forensic postmortem cases have been studied under controlled conditions. In each case, temperatures of the brain, liver, rectum, and the environment were monitored over a period beginning shortly after death and ending up to 60 h postmortem. The four temperature measurements were recorded every 5 to 10 min using the Microwave Thermography System. Rectal and environmental temperatures were measured by electrical thermocouples while brain and liver temperatures were measured using microwave probes. Data acquisition, analogue-to-digital conversion (ADC), and data processing were provided by a microcomputer. The ADC technique is described and its problems are discussed. The data were then transferred to a mainframe computer for extensive curve-fitting and statistical analysis. The microcomputer-based ADC and data logging and acquisition were found to be accurate, fast, easy to implement, and useful for the field. The postmortem rate of human body cooling was found to be adequately represented by triple-exponential equations.

Adult↗
PubMed2001

[Application of computer thermography in diagnosis of chronic focus of inflammation and the definition of indications to the use of antibiotics before operation in patients with post-operative hernia of anterior abdominal wall].

We studied the informative value of computer thermography in diagnostics of inflammatory changes in hernia region in 53 patients with post-operative hernia of anterior abdominal wall. Four variants of thermogram were obtained depending from temperature gradient in symmetric points of hernia hilus. This was used to substantiate preventive antibiotics prescription according to general scheme in pre-operation period in 25 patients and administration of electrophoresis of cefazoline in further 28 patients. The method was effective to reduce inflammatory changes in hernia hilus region in 88.9% of patients, which was defined based on temperature gradient decrease in symmetric regions of hernia. Post-operative complications rate decreased from 15.7 to 12.3%. The suppuration of post-operative wound was not observed.

Adult↗
PubMed1975

Unilateral exophthalmos investigated by infrared thermography.

A group of 40 cases of unilateral exophthalmos have been investigated using infrared thermography. Two groups of cases can be distinguished according to the intensity of thermal anomalies: (a) no hyperthermy, allowing exclusion of an acute inflammation and rather suggesting an endocrinal process that nevertheless includes the possibility of a deep and/or weakly thermogenous tumor and (b) marked orbital hyperthermy, excluding any endocrinal origin and generally reflecting a malignant tumor.

Adolescent↗
PubMed1975

Diagnosis, follow-up and prognosis of malignant melanomas by thermography.

UNLABELLED: Reference was made to a series of 35 cases of malignant melanoma which had not been operated on, and contributions of thermography in the following were taken into consideration. 1. DIAGNOSIS: the complementary nature of clinical, thermographic and histological information, both for the tumour and the lymph nodes; differentiation between less thermogenic malignant melanomas (Dubreuilh melanosis, LMM and SSM) and the forms giving rise to extensive and intense hyperthermy (NM). 2. PROGNOSIS: proposal of a prognostical classification which permits the evaluation of malignancy and, to a certain degree, the prediction of survival in a manner which is more significant than the histo-topographical classification. 3. FOLLOW-UP: detection of local recurrences and/or lymph-node metastases in an infra-clinical state.

Follow-Up Studies↗
PubMed1975

Thermography and vasomotor test.

Vasomotor tests have a great diagnostic interest in many dermatologic diseases. Histamine dihydrochloride and acetylcholine chloride in intradermal injections, a rubefacient derived from nicotinic acid in epicutaneous application, and the dermograph are commonly used and studied here. There remain many unknown and controversial factors in the interpretation of the mechanisms of the drugs used for these tests. A thermographic approach using infrared thermography and the most recent technique with liquid crystals in sheet provide a new contribution to studies on vasomotor tests; these methods have contributed to the study of the vasomotor reactions observed in different dermatological affections, in particular atopic eczema, and have introduced new data in the controversy which subsists about interpretations of 'delayed cholinergic blanch'.

Acetylcholine↗
PubMed1975

Thermography in veterinary medicine.

Thermography in veterinary medicine has hitherto been proven to be a method of great value in the detection of orthopaedic lesions in racehorses. Lesions of the musculo-skeletal system affecting tendons, joints, bones and skeletal muscle can be demonstrated and documented at an early stage thereby preventing the development of more serious lesions.

Animals↗
PubMed1975

Airborne thermography or infrared remote sensing.

Airborne thermography is part of the more general remote sensing activity. The instruments suitable for image display are infrared line scanners. A great deal of interest has developed during the past 10 years in airborne thermal remote sensing and many applications are in progress. Infrared scanners on board a satellite are used for observation of cloud cover; airborne infrared scanners are used for forest fire detection, heat budget of soils, detecting insect attack, diseases, air pollution damage, water stress, salinity stress on vegetation, only to cite some main applications relevant to agronomy. Using this system it has become possible to get a 'picture' of our thermal environment.

Aviation↗
PubMed1975

Thermography in diagnosis of breast diseases.

While carrying out 10,000 breast thermographic studies we have examined 4,000 palpable lesions, 1,100 of which were verified cancers. The study of these cases according to our classification into 5 categories has shown that: (1) in the benign lesions, there were 18% equivocal results and 13% 'false positives', and (2) in the malignant diseases, there were 18% doubtful thermograms, 8.5% 'false negatives' and 10% 'false positives'. Thermography allowed us to detect 10 subclinical and 56 occult cancers; in another connection we have identified a growth phase in 11% of our cancers (fast-growth forms).

Breast Diseases↗
PubMed1975

Techniques of infrared thermography.

Considering the main objectives of thermographic techniques and the particular characteristics of passive infrared detection, the essential arguments in favor of single detector scanners have been pointed out after a brief discussion of the detection and image pickup methods when quantitative and precise (0.1 degrees C) information on the temperature distribution near ambient temperature must be obtained. Single detector scanners can have sufficiently good performance to reach the objectives of precise thermography, but their real technical limits must be well-known in practice; consequently, the thermograph performance must be clearly defined by means of the modulation transfer function, the intrinsic thermal resolution and the response uniformity, as we indicate in the second part of this paper.

Infrared Rays↗
PubMed1975

[Phosphorus-32 test and thermography in hormonal study of breast cancers].

The results given by the P 32 test and thermography were compared in 92 cases of cancer of the breast, of which 7 appeared after oestrogens or androgens had been administered. After a hormone test of short duration it seemed that reliable results indicating hormone-dependent cancers would only be obtained with the thermographic test.

Aged↗