The use of audiovisual films in supervised observation.
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Motion Pictures↗
Biomedical subjects
R B Irwin
Publications and source records attributed to R B Irwin.
Effectiveness of speech therapy for second grade children with misarticulations--predictive factors.
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Child↗
An audio-visual test for evaluating the ability to recognize phonetic errors.
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Adolescent↗
MR imaging of myositis ossificans: variable patterns at different stages.
Five patients with a palpable mass at presentation underwent magnetic resonance (MR) imaging. The final diagnosis was myositis ossificans (MO). MR imaging features, particularly after injection of gadopentetate dimeglumine, mimicked those of an inflammatory mass or neoplasm. The lesions were excised in three patients, and the images were correlated with histologic findings. Three different appearances were noted on MR images, corresponding to the stages of maturation of MO. Two cases involved early-stage lesions, and T1-weighted MR images showed a mass with homogeneous intermediate signal intensity. Both lesions showed rim enhancement after contrast agent injection and high signal intensity on T2-weighted images. Pathologic specimens demonstrated stroma with masses of spindle cells in which osteoid production was interspersed. The enhanced rim of the lesion mimicked the expected MR appearance of an abscess or necrotic tumor. Areas of enhancement in adjacent muscle were also seen on postcontrast T1-weighted images. Intermediate-stage MO was present in one case; there was evidence of a thin rim of calcification on plain radiographs and fatty changes in the lesion on T1-weighted images, corresponding with histologic findings. One case of a mature lesion showed a considerable degree of peripheral calcification both on MR images and at histology. MR imaging is nonspecific in the diagnosis of early-stage MO.
Abscess↗
Judgments of vocal quality, speech fluency, and confidence of Southern Black and White speakers.
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Black or African American↗
Orthopedic injuries in water-skiing: etiology and prevention.
The inherent danger of orthopedic injury is little recognized in the extremely popular sport of water-skiing. The water-skiing equipment, the speed at which the boat is driven and the experience of the skier play a major role in the severe injuries reported here.
Adolescent↗