A standard program of computed tomographic (CT) scanning of the human skeletal muscular system was developed. Scans were obtained on five levels: the neck, the shoulder girdle, the pelvic girdle, the thigh, and the lower leg. The normal size and density of several muscles were determined. CT scans were also obtained in patients with various neuromuscular diseases. Several types of lesions were found, and their morphologic descriptions and quantitative data are presented. It is concluded that CT opens new possibilities for the evaluation of muscular atrophy and hypertrophy.

Computed tomography (CT) scans of skeletal muscles of 3 patients with pseudohypertrophic muscular dystrophy are presented. Different patterns of muscle alterations and particularly of pseudohypertrophy are described. The significance of the radiological findings for clinical examination, electromyography, and needle biopsy is discussed.

The use of gray scale equipment in a prospective study of radiologically non-visualizing gallbladders, permitted detection of a new echographic aspect of gallbladder disease. Along with even, discrete bile thickening and the presence of sand-sized calculi, thickening of the gallbladder wall incholecystitis is another ultrasonographic sign of gallbladder disease that can be visualized successfully by gray scale ultrasound.

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