ISSN:0091-2751    

DOI:10.1002/jcu.1870070602

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.1870070603

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

年代:1979

数据来源: WILEY

摘要:

AbstractInflammatory and neoplastic infiltrations of the intestinal wall lead in advanced stages to a tumorous thickening that can be visualized by ultrasound as the so‐called cockade sign. The possibilities and limitations of ultrasound diagnosis of gastrointestinal tumors are presented. Over a period of 2 years, 73 tumors were diagnosed, 39 primarily by means of ultrasound with the real‐time technique; 15 tumors were curatively resected at the time of primary ultrasound diagno

ISSN:0091-2751    

DOI:10.1002/jcu.1870070604

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

年代:1979

数据来源: WILEY

摘要:

AbstractThe diagnosis of an unruptured interstitial gestation can be made by means of ultrasound examination. The most specific finding is an incomplete myometrial mantle around the sac. An eccentrically placed sac and failure to demonstrate the sac within the uterine cavity, i.e., near the internal os on the longitudinal scans, may be helpful ancillary findings. The differential diagnosis must take into consideration a pregnancy within one horn of a bicornuate uterus and a pregnancy within a myomatous uterus. Although this is a rare condition, it carries significant mortality if it ruptures. Diagnosis prior to rupture will reduce mortality and offer the possibility of preserving reproductive capabilities.

ISSN:0091-2751    

DOI:10.1002/jcu.1870070605

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

年代:1979

数据来源: WILEY

摘要:

AbstractIn order to determine normal echocardiographic values for older subjects, we studied 136 adults (78 men and 58 women, 20 to 97 years of age) without evidence of cardiovascular disease. When patients were subdivided into six age groups, progressive changes were found in mean normal values for various parameters. Specifically, when the oldest group (over 70 years) was compared with the youngest group (21–30 years), significant (p<0.01) increases in aortic root (22 percent) and left atrial (16 percent) dimensions, in ventricular septal (20 percent) and left ventricular free‐wall (18 percent) thicknesses, and in estimated left ventricular mass (15 percent) were noted. In addition, a significant (p<0.01) decrease in mean mitral E‐F slope (43 percent) and slight decreases in mean left ventricular systolic and diastolic internal dimensions (5 and 6 percent, respectively;p<0.05) were noted. Left ventricular ejection fraction and percentage fractional shortening were found to be independent of age. These data have been used to derive regression equations that are related to both age and body surface area. The regression equations can be used to calculate mean normal values and 95 percent prediction intervals for echocardiographic measurements in a

ISSN:0091-2751    

DOI:10.1002/jcu.1870070606

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

年代:1979

数据来源: WILEY

摘要:

AbstractThe results of B‐mode ultrasound examinations in 113 consecutive patients with unilateral renal nonfunction or severe azotemia were reviewed. The causes of nonfunction included the following: hydronephrosis; renal parenchymal disease; renal agenesis; atrophy or dysplasia; multicystic, medullary cystic, and polycystic kidneys; renal arterial or venous occlusive disease; extensively infiltrating neoplasm. The sonographic findings were consistent with the final diagnosis in 92 percent of the cases. A coronal view of the kidney for diagnosing hydronephrosis is described. This view demonstrates the dilated calyces in continuity with the renal pelvis and, when combined with transverse views, improves the reliability of the sonographic diagnosis of hydronephrosis. In cases where the renal landmarks appear totally normal, obstruction can be excluded as a cause of nonfunction, and retrograde pyelography may be avoided. The sonographic manifestations of other parenchymal abnormalities associated with nonfunction, such as cystic renal disease, glomerulonephritis, and renal transplant rejection, are also discusse

ISSN:0091-2751    

DOI:10.1002/jcu.1870070607

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

年代:1979

数据来源: WILEY

摘要:

AbstractUltrasound scanning in early pregnancy sometimes reveals a 2–5‐mm spheric structure lying adjacent to the fetus. The occurrence of this structure was studied in 60 consecutive ultrasound examinations. In the 7th to 9th weeks the sphere was seen in 19 of 22 examinations, and in the 10th and 11th weeks it was seen in 10 of 20 examinations. The sphere was not demonstrated in any of 18 examinations in the 12th to 14th weeks. It is believed that the spheric structure is the yolk

ISSN:0091-2751    

DOI:10.1002/jcu.1870070608

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

年代:1979

数据来源: WILEY

摘要:

AbstractEchocardiograms were recorded using a left posterior thoracic approach in 17 patients with left pleural effusion. Comparison of these records with those obtained using the conventional technique in the same patients revealed that the left posterior thoracic approach yielded records of adequate quality in all patients. The mitral valve, the left ventricle, and the posterior pericardium were well defined. In 10 patients in whom pericardial effusion was also present, the posterior approach facilitated clear separation of the pleural and pericardial effusions. A major limitation of the posterior technique appears to be inability to record the aortic root, the aortic valve, and the left atrium.

ISSN:0091-2751    

DOI:10.1002/jcu.1870070609

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

年代:1979

数据来源: WILEY

摘要:

AbstractEthylene glycol—water mixtures have been found suitable for use in ultrasound test objects. A plot of the required percentage of ethylene glycol with room temperature for an acoustic velocity of 1540 m/sec is presented to aid the clinical user. The velocity measurements performed are shown to be dominated by near‐field transient diffraction effects. A 30 percent ethylene glycol—water mixture has been found to have a constant acoustic velocity of 1638 ± 3.5 m/sec over a wide temperature range (15.6°C–38.4°C). This mixture is suitable for a test object velocity standard. Proper use of the A.I.U.M. 100‐mm test object

ISSN:0091-2751    

DOI:10.1002/jcu.1870070610

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

年代:1979

数据来源: WILEY

摘要:

AbstractEchographic diagnosis of breast cancer has been used in clinical medicine for the past several years. Echographic findings and characteristics suggesting differentiation between malignant and benign tumors have been reported by various investigators. These signs are analyzed in correlation with histological findings, especially cancerous connective tissue and nonconnective tissue and retrotumorous shadow patterns in clinical echograms of various breast cancers. Special reference is made to ultrasound attenuation related to bioacoustical tissue characteristics. This causal mechanism provides a stepping‐stone for further improvements in ultrasound apparatus designed for clinical diagnosis of breast cancer. Furthermore, it may stimulate basic research on the bioacoustical properties of ultrasound reflection, absorption, and velocit

ISSN:0091-2751    

DOI:10.1002/jcu.1870070611

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

年代:1979

数据来源: WILEY