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Biomedical subjects

R S Holland

Publications and source records attributed to R S Holland.

4 recordsLinked to original sources
PubMed1998

Granular cell tumor of the larynx in a six-year-old child: case report and review of the literature.

Granular cell tumors (granular cell myoblastomas) are uncommon neoplasms in the adult population, occurring predominantly in the head and neck and most frequently in the tongue. Laryngeal presentations are unusual, and granular cell tumors of the larynx in children are extremely rare, with a total of 19 cases reported in the literature in children under the age of 17 years. We report an additional case of a laryngeal granular cell tumor, in a six-year-old boy, and discuss the clinical, histologic, ultrastructural and therapeutic aspects of these neoplasms.

Child↗
PubMedDate not supplied

Film-screen sharpness in complex motion tomography.

An unsharp radiologic image is created in tomography by the combined motion of the x-ray tube and the film-screen cassette. This image is generally recorded at angles other than normal to the film-screen plane. A metbd for determining the influence of this recording angle on film-screen sharpness is described. The method involves imaging an edge target at various angles between the x-ray beam and the film-screen plane. The MTF is then calculated from the edge images. The effect of film-screen sharpness and quantum noise on subjective image quality in temporal bone tomography is discussed.

Technology, Radiologic↗