摘要:

AbstractOver a period of 3 years, 68 intrahepatic abscesses in 48 patients were detected by ultrasonography at our institution in New Delhi, India. Our experiences with the sonography and management of this entity are presented. Multiple abscesses were present in 14 patients; the rest had a single abscess. The most common location was the right lobe of the liver. The sonographic morphology of the abscess was analyzed in terms of the echo pattern of the wall and contents of the abscess. These were later correlated with the duration of illness. An attempt was made to assess healing and thereby the age of the abscess. Follow‐up ultrasound scans indicated that the change in sonographic appearance lags behind clinical improvement by a considerable period of tim

ISSN:0091-2751    

DOI:10.1002/jcu.1870140402

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractStandards for the relationship between BPD and gestational age are used for the assessment of fetal size. We measured the BPD in 310 women with exact gestational age in a cross‐sectional study. Two types of BPD charts were constructed based on tolerance intervals: (1) directly from measurements and (2) after model fitting. We found that the tolerance intervals based on the model are smoother and narrower than those achieved by direct determinations. The fit, advantages, and prospects of the model are discusse

ISSN:0091-2751    

DOI:10.1002/jcu.1870140403

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractHigh‐intensity reverberation artifacts frequently occur within the fetal cranium during obstetric ultrasound examinations. One hundred ninety‐six static ultrasonograms obtained from 100 consecutive obstetric patients were reviewed to determine the incidence, shape, and location of high‐intensity reverberation artifacts within the fetal head. Such artifacts occurred in one‐third of the fetuses examined. The most common appearance was an arc‐shaped artifact that occurred most frequently in the fetal hemicranium farthest from the maternal skin surface. Such an artifact can mimic epidural fluid collections and cause confusion for examiners not familiar with this finding. A discussion of this “pseudoepidural” artifact, its cause, and ways of excluding underlying intracranial pathology

ISSN:0091-2751    

DOI:10.1002/jcu.1870140404

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractSince the advent of ultrasound, pelvic and abdominal masses occurring with pregnancy are being recognized more frequently and at earlier stages of gestation. The precise sonographic definition of the size and location of a mass is important for determining route of delivery or surgical approach during laparotomy and cesarean sections. We hope to illustrate that a variety of etiologies need to be considered, and although it is not often possible to make a histologic diagnosis on the basis of ultrasound findings alone, the integration of imaging information with other clinical data can be helpful in narrowing the differential diagnostic possibilities.

ISSN:0091-2751    

DOI:10.1002/jcu.1870140405

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractTwo‐dimensional echocardiography has been found to be an effective clinical tool in diagnosing intracardiac thrombi. Misdiagnosis may, however, still frequently occur because of the difficulty in differentiating the thrombi from other intracavitary masses based only on the echographic appearance of these structures. Ultrasonic tissue characterization techniques have been used in attempts to minimize this diagnostic uncertainty. Previously. we have shown that all ultrasonic parameters of blood, including ultrasonic backscatter, a quantitative measure of echogenicity, at 7.5 MHz increase rapidly following clotting. In this article, we report recent results on the measurements of attenuation and backscatter of thrombi as a function of time following clotting over the frequency range of 3 MHz to 8 MHz. These results indicate that ultrasonic backscatter from thrombi 12 h old is at least 18 dB higher than that of unclotted blood over the frequency range of 3 MHz to 8 MHz, and the slope of the attenuation coefficient is increased to 0.43 dR/cm‐MHz. Comparison with the back‐scatter of bovine myocardium shows that the myocardium is more echogenic than fresh thrombi and is less echogenic than thrombi 12 to 24 h old. Similar results were also obtained for integrated backscatter measurements over the same frequency

ISSN:0091-2751    

DOI:10.1002/jcu.1870140406

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractFresh liver specimens have been ultrasonically imaged in vitro in order to evaluate specimen air content before the acquisition of ultrasonic waveform data for tissue characterization studies. It was found necessary to expose liver slices to vacuum for about 16 h in order to remove enough air to acquire waveform data from air‐free regions of interest in these slices. Larger portions of liver, and whole liver, were found to retain large amounts of air even after 16 h of exposure to vacuu

ISSN:0091-2751    

DOI:10.1002/jcu.1870140407

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

摘要:

AbstractWe describe seven infants who developed renal calcification and bone de‐mineralization following furosemide therapy with average daily doses of as little as 0.75 mg/kg per day. Renal calcifications were present in all seven cases and were more readily detected with ultrasonography than with plain films. Renal calculi were seen in four patients, sonographically demonstrated as echogenic foci in the dependent portion of the collecting system, usually accompanied by acoustic shadowing. One patient developed nephrocalcinosis, sonographically observed as echogenic medullary pyramids plus punctate, shadowing parenchymal calcifications. In two patients the location of the calcification could not be determine

ISSN:0091-2751    

DOI:10.1002/jcu.1870140408

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870140409

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870140410

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870140411

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1986

数据来源: WILEY