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Biomedical subjects

S R Matteson

Publications and source records attributed to S R Matteson.

50 records · Page 3Linked to original sources
PubMed1979

Computed tomography: a three-dimensional study of the nasal airway.

1. Accurate volume measurement of the nasal airway based upon computed tomography images sequentially generated along the length of the airway is possible. 2. The cross-sectional area of the airway at any position along its length can be determined. 3. The most constricted part of the airway is not necessarily at the location of the turbinates. 4. Details of hard- and soft-tissue anatomy not otherwise discernible can be detected with computed tomography imaging.

Cephalometry↗
PubMed1979

Aggressive ossifying fibroma of the maxilla: review of the literature and report of case.

A case of a large aggressive ossifying fibroma of the maxilla has been presented. Review of the literature shows the literature shows the difficulty in establishing a definitive diagnosis through any single diagnostic modality. Much of this is due to the confusion surrounding classification of the tumor. Adjunctive radiographic and nuclear medicine diagnostic aids were utilized, as were clinical, laboratory, and histopathologic studies, in resolving the diagnostic questions posed by this large and aggressive tumor. Surgical intervention through conservative enucleation produced few operative or postoperative difficulties and minimal residual deformity. Differentiation of ossifying fibroma from other benigh and malignant neoplasms as well as fibrous dysplasia is important in the correct management of this lesion.

Adolescent↗
PubMed1977

Juvenile nasopharyngeal angiofibroma. An unusual presentation as an oral mass.

Although juvenile nasopharyngeal angiofibroma (JNAF) usually presents as a mass in the nasopharynx, the primary manifestation may, in rare instances, occur intraorally. We observed such a case in a 12-year-old boy. The clinical finding of hemorrhage from the nasopharynx or contiguous areas in a male adolescent is an important diagnostic clue which should alert the clinician to the possibility of JNAF as the underlying cause.

Child↗
PubMed1977

Fine structure of the Panorex image.

The plane of focus free of blur margin, as well as the rate of increase of blur margin both medial and lateral to the plane of focus, has been described in the Panorex panoramic x-ray machine by means of a continuous phantom. The average of readings made at ninety-eight separate film positions yields a focaltrough thickness of 4.3 mm. if a blur margin of 10 per cent of the phantom's film image is accepted, the percentage blur increasing directly with trough thickness. The factor enlargement of objects at the plane of focus is uniform at 1.25 and increases along with percentage blur more rapidly for objects medial to the plane of focus than for objects lateral to it.

Models, Anatomic↗
PubMed1976

Localization of objects in the anterior areas with a single Panorex radiograph.

Impacted objects in the anterior dental region can be localized in a labial-palatal direction with a single Panorex film. Clark's rule is applied to the two views of the anterior area obtained. The technique is verified by means of a dry skull with lead markers in known positions, and two clinical cases are reported.

Adult↗
PubMed1976

Warthin's tumor. Report of a case and survey of 205 salivary neoplasms.

A case of Warthin's tumor with an unusual sialographic appearance is reported. The extensive pooling of the contrast media within the tumor was probably the result of communication of the cystic spaces of the tumor with the ductal system of the parotid gland. This case stimulated a re-examination of the incidence of this tumor, with a study of 205 major salivary gland tumors from pathology reports in the files of Hartford Hospital which is affiliated with the University of Connecticut Health Center in Farmington, Connecticut.

Adenolymphoma↗
PubMed1976

99MTc-diphosphonate bone imaging and uptake in healing rat extraction sockets.

Clinically positive bone scans of the jaws may result from a variety of benign dental conditions. An experimental system for studying radionuclide imaging and uptake in the jaws of rats was developed. Sequential 99mTc-diphosphonate bone scans and radionuclide uptake determinations were performed on rats after standardized extractions of their mandibular left first molars. Positive bone scans were seen 4-16 days after molar extraction, and increased radionuclide uptake was found in the healing extraction wounds 4-42 days after the extraction. Conventional radiography and histology fail to show unusual bony architecture in extraction sockets at such times. These results correlate with clinical findings in patients and suggest that human beings may have positive bone scans for several months after dental extraction.

Animals↗