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An optical method is described for studying the spatial and temporal characteristics of broad‐band ultrasonic pulses propagating in transparent media. The simplicity of the approach suggests its consideration as a method for calibration and comparison of the transmitted pulse characteristics of...
We conducted this investigation to determine the clinical utility of time‐interval histogram (TIH) analysis of the output of the range‐gated pulsed Doppler in children with pulmonary stenosis. The interpreters and performers of the test were kept as blind as possible to the diagnosis. Fourteen...
The sonographic findings in five patients with metastases to the spleen are demonstrated. Hypoechoic lesions were seen in patients with histiocytic lymphoma, and both echogenic and hypoechoic lesions were seen in patients with melanoma. The clinical significance of these findings is discussed.
The normal anatomy of the placenta and the retroplacental area can be well defined with gray scale sonography. The placenta has a characteristic granular echo pattern, with strong echoes emanating from the chorionic plate. After 37 weeks, strong echoes representing calcification may appear; this...
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