摘要:

AbstractThe usefulness of local textural analysis in identifying diseases of the liver has been evaluated. In comparing two areas texturally, a random distribution of one or several textural parameters indicates identical tissue, whereas a distinct clustering can be used to discriminate between different tissues. Using this procedure, various diseases of the liver were differentiated accurately whereas different images of the same state of the liver were classified as similar with high accuracy.The consistent results with different patients, sections, sample locations and scanner parameter settings demonstrate that these factors have no impact on the characteristics of the resulting pattern used for discrimination and therefore for the final diagnosis.The overall diagnostic accuracy of this method seems better than conventional sonographic evaluation of parenchymal liver disease and at least competitive with other computerized methods described. The most important result clinically seems to be the high accuracy in differentiating between hepatitis and normal liver, which cannot be achieved by conventional ultrasonography.

ISSN:0091-2751    

DOI:10.1002/jcu.1870160702

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

年代:1988

数据来源: WILEY

摘要:

AbstractA prospective study was conducted to evaluate the estimation of fetal weight in preterm pregnancies by use of ultrasound measurements. Two equations for estimating fetal weight, one proposed by Shepard and associates and the other by Hadlock and associates, were evaluated. The ability to estimate fetal weight accurately was evaluated with respect to birth weight and menstrual age. Shepard's equation is associated with a lower mean signed percent error than Hadlock's, when the birth weight is less than 1500 g (4% vs 12%) or when the menstrual age is between 23 weeks to 30 weeks (2% vs 10%). However when the birth weight is between 1500 g and 3500 g, or the menstrual age is between 31 weeks to 36 weeks, Hadlock's equation has a lower mean signed percent error: 1% vs −4% for the birth weight category and 2% vs −3% for the menstrual age category. In preterm gestations both equations estimate fetal age weight with a low mean signed percent error–Shephard's −0.4% versus Hadlock

ISSN:0091-2751    

DOI:10.1002/jcu.1870160703

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

年代:1988

数据来源: WILEY

摘要:

AbstractAssessment of flow in the left anterior descending coronary artery by Doppler echocardiography appeared to be possible in some patients in which the coronary artery system might be wide and/or the displacement of the coronary artery might be reduced because of cardiac enlargement or of impaired cardiac function. A study of this possibility was carried out in 78 patients, 20 cases with hypertrophic cardiomyopathy, 10 with dilated cardiomyopathy, 20 with aortic valve disease, and 28 following valve replacement for aortic valve disease.The anterior interventricular sulcus was a helpful landmark to search for the left anterior descending artery. The characteristic feature of the coronary flow pattern, that the flow ran mainly during diastole, was also helpful in finding the coronary artery. Complementary roles of ultrasonic imaging and Doppler ultrasound evaluation should be emphasized for identifying a thin echo‐free space in the sulcus as the coronary artery.The left anterior descending coronary artery was imaged in 26 of the 78 patients. The peak velocity ranged 24 cm/s to 75 cm/s in different patients.Because the present study was carried out in patients with some particular diseases, these results do not indicate that current techniques can be routinely used for assessing the coronary flow. The detection rate will be increased with improvements in image resolution and the Doppler sensitivity.Although the detection rate of the coronary artery was not satisfactory in the present stage, the effect of sublingual administration of nitroglycerin on coronary circulation was noninvasively assessed in some patients, where reduction of the flow velocity by about 27% was observed in real tim

ISSN:0091-2751    

DOI:10.1002/jcu.1870160704

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

年代:1988

数据来源: WILEY

摘要:

AbstractSix patients with scrotal brucellosis were ultrasonically examined. All cases were of acute onset. Concomitant involvement of testes and epididymes were noted in all cases except one in which the epididymis was spared. Abnormal sonographic findings consisted of enlargement of the testes and epididymes, nonhomogenous hypoechoic diffuse, or focal echo patterns in all cases and a hydrocele in one case.

ISSN:0091-2751    

DOI:10.1002/jcu.1870160705

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

年代:1988

数据来源: WILEY

摘要:

AbstractUltrasonography was performed on 10 patients with acute posttraumatic conditions of the knee in which X‐ray films could exclude the presence of fractures. In 2 of 10 cases, the sonographic picture was normal; in the remaining 8 patients, ultrasonography disclosed capsulo‐ligamentous lesions of different degrees of severity that were confirmed by surgery in 5 of 8 cases.The main sonographic signs of articular traumas were abnormal widening of the joint space (7 cases), intra‐articular hemorrhage (8 cases), rupture of the medial collateral ligament (4 cases), or irregularity of its structure (3 cases).Ultrasonography is proposed as an effective and simple first‐line method for the study of knee joint traumas. It can be performed in all cases presenting with painful joint swelling without radiographical evidence of fr

ISSN:0091-2751    

DOI:10.1002/jcu.1870160706

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

年代:1988

数据来源: WILEY

摘要:

AbstractPulsed Doppler recordings of intracranial arterial velocity waveforms were made in 9 hydrocephalic fetuses during the second or third trimesters of pregnancy. Normal, increased, and decreased velocity waveform indices could be measured in these cases, and 1 fetus presented retrograde diastolic flow. Cerebral blood flow patterns of hydrocephalic fetuses seem to differ individually from case to case, presenting no uniform waveform type in late pregnancy. There was no obvious correlation between ventricular dilatation and the type of the velocity waveform.

ISSN:0091-2751    

DOI:10.1002/jcu.1870160707

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

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160708

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

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160709

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

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160710

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

年代:1988

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870160711

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

年代:1988

数据来源: WILEY