Abstract
Since 1955 ultrasound has been used to locate the midline structures of the brain (7), particularly in evaluating patients with head trauma and suspected brain tumors (2, 6). In general, the overall accuracy has been greater than 94 per cent (1, 2). Serial studies have been previously undertaken to determine shifts of the midline during the course of illness in patients with proved tumors or cerebrovascular disease (4, 5, 9). In this communication we present data obtained in an ultrasound study of 30 patients who received radiation therapy for intracranial masses. The midline structures of the brain were located before, during, and after completion of therapy, and correlation of the degree of displacement with the clinical status of the patient was attempted. Technic A commercially available ultrasonoscope is set so that there is damping of the first 2 cm of tissue depth followed by maximum amplification. A 2.25 megacycle transducer with 3∕4 in. diameter surface is used. The transducer is placed in three ...
Published Version
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