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111.
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P J Lawther 《Nederlands tijdschrift voor geneeskunde》1966,110(52):2318-2319
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Large and medium-sized blood vessels can be identified on extracranial computed tomographic (CT) scans when a combination of infusion and bolus injection of conventional contrast material is administered. The cases illustrated in this report show that CT angiography can sometimes offer clinically useful information not present on CT scans obtained without contrast injection. 相似文献
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Transfontanelle, real-time ultrasound (US) examinations were performed in two newborn infants with congenital pineoblastoma. The tumors were hyperechoic relative to the surrounding cerebral tissue. Both were midline lesions that abutted on the posterior portion of the third ventricle, causing obstructive hydrocephalus. The US findings were correlated with CT, pathologic examination, and clinical follow-up study. 相似文献
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Measurements of forced expiratory volume at 1 second, forced vital capacity, and maximum midexpiratory flow have been made on four normal subjects employed in central London on each working day for five years. For three of the subjects, MMF was highest on days with low concentrations of smoke and sulphur dioxide, and it decreased at successively higher concentrations, but it was not clear whether this was an effect of pollution or of other associated factors. Respiratory infections were found to have pronounced effects on these spirometric measurements, and analysis of the results for the complete series revealed small seasonal variations and long-term changes, some of which were large and in the opposite direction from those expected with increasing age. Some immediate but transient effects of pollution on the spirometric values were seen following exercise in periods of high pollution. In addition to small direct effects, the role of pollution in affecting the course of respiratory infections and thus indirectly further affecting ventilatory function was considered. 相似文献