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Biomedical subjects

M S Lapayowker

Publications and source records attributed to M S Lapayowker.

At least 19 recordsLinked to original sources
PubMed1983

Thermography and oral inflammatory conditions.

A brief review of the literature on the use of thermography in medicine and dentistry is presented. This is followed by the presentation of eleven case reports of the use of thermography in dental clinic patients with various oral inflammatory conditions. The results showed that in seven of the eleven cases the thermogram was able to delineate the involved from the noninvolved side. The findings were nonspecific, however, and in its current form thermography cannot be used alone for differential diagnosis.

Cellulitis↗
PubMed1980

Thermography and ultrasound in detection and diagnosis of breast cancer.

Although thermography has not proven to be of significant value in detecting early breast cancer as used in the National Breast Cancer Detection Program, it can represent a high risk indicator and can be useful in combination with other factors in reducing the number of women who should receive routine mammograms for screening purposes. In breast cancer patients, thermography has been shown to have prognostic value. "Cold" breast cancers have an increased survival as compared to those with increased infrared emission in some series. The use of diagnostic ultrasound to date has been generally limited to evaluation of breast cancer or masses found by either palpation or mammography. Recent improvements in technology with the use of multiple transducers, higher frequencies, through-transmission techniques, and computerization have resulted in finding lesions greater than one centimeter in diameter. Lesions below this size and small calcifications have not so far been generally demonstrated successfully because of the limitation of ultrasound resolution.

Breast Neoplasms↗
PubMed1979

Thermographic diagnosis of deep venous thrombosis.

Two hundred patients with suspected deep venous thrombosis had thermography performed prior to ascending phlebography. Diagnostic agreement was obtained in 79%. Published diagnostic thermographic criteria were used; it was not possible to diagnose consistently limited or early thrombosis, especially in the calf muscle veins. Venous insufficiency produced the majority of false positives.

False Negative Reactions↗
PubMed1979

Thermographic diagnosis of deep venous thrombosis: anatomically based diagnostic criteria.

Deep venous thrombosis is associated with increased heat emission from involved muscle groups and deviation of blood flow from the deep to the superficial venous system. Both of these features can be documented by thermography. An appreciation of the muscular and venous anatomy of the lower limb allows recognition of predictable thermographic images reflecting involvement of various muscle groups in the leg. It is expected that these anatomically based criteria will improve the diagnostic accuracy of thermography and offer a noninvasive, easily repeatable modality of examination for the diagnosis of deep venous thrombosis.

Humans↗
PubMed1978

CT intracranial localization with a new marker system.

Application of a new CT localization system for intracranial lesions in pre- and intraoperative guidance is described. This system consists of air grooves within an acrylic plate for CT examinations and a duplicate plate with wires in place of air grooves for scout radiography. This new device can also be applied in stereotaxic surgery or in radiotherapy planning.

Brain↗
PubMed1978

A device to indicate anatomical level in computed tomography.

A device was designed that makes possible direct anatomical correlation between the computed tomography scan and radiographic scout films. The acrylic-air groove approach used here eliminates the possibility of producing image degrading artifacts as is common with catheter type markers.

Brain↗
PubMed1976

Criteria for obtaining and interpreting breast thermagrams.

The thermal and graphic criteria which should be used to evaluate breast thermograms are outlined. Thermograms are then categorized as normal, suspicious, or abnormal on the basis of the criteria outlined. It is hoped that these criteria can be used widely to standardize breast thermographic evaluation.

Breast Neoplasms↗
PubMed1976

Calcification and ossification within the orbit.

The radiological diagnosis of orbital lesions can be aided by an understanding of the significance of the various kinds of calcium deposits. Orbital calcification may be metastatic or dystrophic, with ossification occurring in degenerated eye tissue in the presence of an abundant blood supply. It is the dystrophic type which is usually visualized radiographically. Intraorbital calcification had been categorized according to its configuration and location (a) ocular; (b) extraocular; and (c) extraorbital extending into the orbit on frontal radiographs. Lesions discussed include cataract, phthisis bulbi, vascular abnormalities, infection, and tumor.

Bone Diseases↗
PubMed1976

The midsternal stripe: a sign of dehiscence following median sternotomy.

Sternal dehiscence is a recognized complication of median sternotomy in 2.5-4.8% of patients. The authors describe the prognostic significance of a lucent midsternal stripe which was seen in 12 patients over a two-year period. Sternal dehiscence requiring surgical revision developed in 4, and radiological suspicion preceded clinical evidence of dehiscence in 3 of them. A review of 100 consecutive median sternotomies revealed that sternal dehiscence did not develop in any patient who did not have a midsternal stripe. It is suggested that this may be a useful tool in identifying those patients who are at high risk of the development of sternal dehiscence.

Adult↗
PubMed1975

Breast thermography as a screening technique. An evaluation of performance data.

The concepts of relative operating characteristics (ROC-curves) and detectability index (d') are introduced for the purpose of evaluating performance in breast thermography. In assessing published information on the subject we have found that much of it is anecdotal and lacks sufficient data to determine performance. We have also found that for those published findings which had sufficient data it was possible to reconcile conflicting conclusions as to the efficacy of thermography, and that performance could be quantitated with the use of the detectability index. Conclusions for optimizing available clinical thermographic techniques are given together with ways for future improvement.

Breast Neoplasms↗
PubMed1975

Computer Diagnosis of Breast Thermograms.

A computer-based technique was developed for the automated diagnosis of breast thermogram. Eighty-five thermograms were digitized and analyzed, and 23 parameters computed for each thermogram. A statistical decision program, based on a linear discriminant analysis technique, classified the thermograms into normal and abnormal categories. The accuracy of classification was evaluated by several techniques and found to be comparable to that of trained thermographers.

Breast Neoplasms↗