OBJECTIVE. The purpose of thisstudywasto determine if tissueharmonicimaging(THI) sonography produced higher quality images than did conventional sonography.
SUBJECTS AND METHODS. A prospective studywasperformed on 89 patients tocompare the image quality ofTHI sonography with that of conventional sonography. Each cx amination was performed using THI sonography (transmitted frequency, 2.0 MHz; received frequency, 4.0 MHz) and conventional sonography at 2.5 and 4.0 MHz. The pancreatic area was studied in 60 patients, and other anatomic areas were studied in 68 patients. The images were then graded for penetration, detail, and total image quality. Graders were unaware of the sonographic technique.
Selective embolization of the uterine vessels with gelatin sponge pledgets is a safe and effective method of managing pregnancy-related hemorrhage. Our results suggest that women who undergo this procedure can expect to have a return of normal menses with no adverse effect on fertility.
A prospective study was undertaken to determine the variability of hepatic vein Doppler waveforms in normal subjects. Seventy-five patients without liver or heart disease underwent Doppler examination of the middle hepatic vein. Normal triphasic tracings were observed in 68 subjects, while flattened tracings were observed in seven subjects. In addition, in four T he normal velocity curve of the hepatic vein reflects cardiac and respiratory events.t-J A triphasic pattern has been described in normal subjects, while flattening of this curve has been observed in cirrhotic patients and with the Valsalva maneuver.t--' !1 We conducted a study to determine if "abnormal" or flattened hepatic vein tracings are observed in healthy subjects. The effect of prolonged inspiration on the Doppler tracing was also studied.
MATERIALS AND METHODSThe study group consisted of 75 subjects (age, 20-65 years; mean, 43 years) without liver or heart disease. All patients were examined with color flow images and pulsed Doppler tracings. Examinations were performed on a Quad 2000 (Siemens Quantum, Issa· quah, WA) or an ATL UM·9 (ATL,
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