ISSN:0091-2751    

DOI:10.1002/jcu.1870070302

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

年代:1979

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870070303

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

年代:1979

数据来源: WILEY

摘要:

AbstractWe 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 children with valvular pulmonary stenosis and 52 control subjects were evaluated. Diagnosis was confirmed by cardiac catheterization in 13 of 14 experimental analyses and 43 of 52 control analyses. The TIH criterion tested was a frequency dispersion greater than 1 cm in vertical amplitude or a dispersion greater than one‐third of the amplitude of the total complex in larger complexes. Both evaluators detected those children with pulmonary stenosis in 13 of 14 instances. Only one examiner detected the abnormality in the other child. Both examiners found pulmonary flow disturbances by TIH evaluation in 16 of 52 controls; one examiner found flow disturbances in 3 other controls. None of these children had a discernible pulmonary valve gradient at catheterization. In most instances the latter flow disturbances represented series effects of disturbed flow. Small numbers of false negative and false positive results occurred, but the results of detection of true pulmonary stenosis were significant (p<0.0001). This investigation demonstrates the clinical utility of TIH evaluation for detecting pulmonary ste

ISSN:0091-2751    

DOI:10.1002/jcu.1870070304

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

年代:1979

数据来源: WILEY

摘要:

AbstractThe results of 91 sonically guided renal biopsies are reported. In the 53 cases where renal size and function allowed other localization techniques, renal tissue was obtained in 100 percent and glomeruli in 88.6 percent. In 38 cases no other techniques could have been used because of poor renal function (serum creatinine ≥ 4.0 mg/dl) and/or decreased renal size (≤ 10 cm); in these biopsies renal tissue was obtained in 86.8 percent and glomeruli in 73.7 perc

ISSN:0091-2751    

DOI:10.1002/jcu.1870070305

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

年代:1979

数据来源: WILEY

摘要:

AbstractRenal sonography is frequently employed to exclude obstructive uropathy in patients with uremia. Sonographic findings of moderate bilateral hydronephrosis were encountered in a dehydrated patient undergoing rehydration. Subsequent excretory urography and a follow‐up renal sonogram were normal. To investigate the possibility that hydration and bladder distension in an otherwise normal and unobstructed collecting system could result in hydronephrosis detectable by ultrasound, 23 apparently normal volunteers underwent renal sonography in the hydrated and basal states. The filled urinary bladder in a patient undergoing hydration frequently results in the sonographic appearance of hydronephrosi

ISSN:0091-2751    

DOI:10.1002/jcu.1870070306

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

年代:1979

数据来源: WILEY

摘要:

AbstractThe 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.

ISSN:0091-2751    

DOI:10.1002/jcu.1870070307

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

年代:1979

数据来源: WILEY

摘要:

AbstractAn 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 medical ultrasound system

ISSN:0091-2751    

DOI:10.1002/jcu.1870070308

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

年代:1979

数据来源: WILEY

摘要:

AbstractThe 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 is a normal physiologic process. The significance of early calcification is unclear. The retroplacental myometrium and venous drainage of the placenta are easily visualized by sonography. Variations in the appearance of the retroplacental myometrium result from different degrees of bladder filling and from uterine contractions. These normal retroplacental structures should not be mistaken for myomas or hematomas.

ISSN:0091-2751    

DOI:10.1002/jcu.1870070309

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

年代:1979

数据来源: WILEY

摘要:

AbstractEleven cases of twin pregnancy presenting for genetic diagnosis in the second trimester are reported. In all 11 cases, a correct chromosomal diagnosis was made on each of the twins. The technique used required only ultrasound and Evan's blue dye for direction of the amniocentesis. Amniography was not performed. The technique used is described in detail, and its advantages over more standard techniques are described.

ISSN:0091-2751    

DOI:10.1002/jcu.1870070310

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

年代:1979

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870070311

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

年代:1979

数据来源: WILEY