ISSN:0091-2751    

DOI:10.1002/jcu.1870050502

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

年代:1977

数据来源: WILEY

摘要:

AbstractPatients who had portacaval shunts were examined both before and after surgery. In the majority of cases, it was possible to detect the portcaval shunt by actually demonstrating the site of anastomosis. There was dilatation of the vena cava just cephalad to the site of the anastomosis due to the increased volume of blood entering the vena cava from the portal system. Mesocaval shunts have also been detected. Splenorenal shunts, however, could not be demonstrated in this series. While gray scale B scan ultrasound was used to record the site of anastomosis and measure the vessel diameters, real time two‐dimensional ultrasound provided dynamic information. Long term serial examinations are being obtained to evaluate the continued patency of the shunts. Ultrasound appears to be a promising new noninvasive study for the evaluation of portcaval shunt

ISSN:0091-2751    

DOI:10.1002/jcu.1870050503

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

年代:1977

数据来源: WILEY

摘要:

AbstractUltrasonic volume backscatter by postmortem human liver was investigated in the 1 to 5 MHz frequency range. Representative values of the backscatter coefficient, its range, and frequency dependence were determined. The backscatter level correlated significantly with protein content in normal livers and with lipid content in abnormal fatty livers. The latter suggests the possible development of a simple, noninvasive, quantitative test for fatty infiltration of the liver.

ISSN:0091-2751    

DOI:10.1002/jcu.1870050504

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

年代:1977

数据来源: WILEY

摘要:

AbstractEchocardiographic studies were performed in 42 sets of parents who had at least one infant with Sudden Infant Death Syndrome (SIDS). Asymmetric septal hypertrophy (ASH) was detected by echocardiography in one member of only 5 percent of the 42 sets of parents. Echocardiograms were also obtained in three other sets of parents who had infants with SIDS (selected because their infants showed small foci of disorganized cardiac muscle cells in the ventricular septum, similar to those present in patients with typical ASH but less marked in severity). ASH was present in one member of each of these three sets of parents. Ventricular septal‐to‐posterobasal left ventricular wall thickness ratios in the five subjects in this study with echocardiographically determined ASH ranged from 1.3 to 1.7, although only one individual showed marked thickening of the ventricular septum (22 mm). Thus, SIDS and ASH do not appear to be commonly associated conditi

ISSN:0091-2751    

DOI:10.1002/jcu.1870050505

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

年代:1977

数据来源: WILEY

摘要:

AbstractIn 141 newborn infants ultrasonic measurement of liver area was performed on the third postnatal day. The liver area was represented by a cross section of the liver at the level where the portal vein entered the organ. There was a linear increase in liver area from 26.8 cm2at 37 weeks' gestation to 33.0 cm2at 41 weeks' gestation. Measurement of liver area does not provide more accurate information on fetal size than upper abdominal circumference in the last weeks of pregnancy. Measurement of fetal head circumference is distinctly less accurate in the assessment of fetal size.

ISSN:0091-2751    

DOI:10.1002/jcu.1870050506

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

年代:1977

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870050507

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

年代:1977

数据来源: WILEY

摘要:

AbstractIn a series of 99 pelvic ultrasound examinations for suspected gynecologic masses, there were 72 established tissue diagnoses. The ultrasound diagnosis was correct in 61 (85 per cent). The specificity, based on a small number (six) of actual negative cases, was 67 per cent. The sensitivity, based on 57 actual positive cases, was 100 per cent. The ultrasound pattern of a homogeneous solid mass obscuring part or all of the uterine border was commonly associated with an erroneous diagnosis. When this pattern is seen, examination of the patient with higher frequency transducers provides useful information that supplements high‐ and low‐gain sc

ISSN:0091-2751    

DOI:10.1002/jcu.1870050508

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

年代:1977

数据来源: WILEY

摘要:

AbstractMethods used to convert the output of diagnostic ultrasound dynamic imaging systems to television format are reviewed. The gray scale characteristics of a large‐screen direct display are compared with the transfer through a display monitor‐television camera‐television monitor chain. Available direct display devices have distinct performance limitations in this application and the transfer linearity and dynamic range of the television converter described are objectively superior. This confirmed a subjective preference of system users to view the TV di

ISSN:0091-2751    

DOI:10.1002/jcu.1870050509

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

年代:1977

数据来源: WILEY

摘要:

AbstractWith the advent and subsequent refinement of gray scale compound scanning, we are now able to obtainin uteroa more detailed look at the size, shape, position, and anatomical relationships between the internal organs and vascular structures within the body of a fetus. It is now possible to visualize fetal intracranial structures, lungs, myocardium and valvular structures, liver, spleen, stomach, abdominal aorta, portal venous system, gall bladder, umbilical vein, kidneys, urinary bladder, and genitalia. Fetal extremities, including individual phalanges, are better visualized with gray scale than with bistable sonography.

ISSN:0091-2751    

DOI:10.1002/jcu.1870050510

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe diagnostic value ofvolumetric analysis of the products of conception by compound ultrasonic scanning is illustrated by a case of hyperplacentosis, hydramnios, and fetal ascites. The use of this method in the diagnosis of fetal conditions is discussed.

ISSN:0091-2751    

DOI:10.1002/jcu.1870050511

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

年代:1977

数据来源: WILEY