ISSN:0091-2751    

DOI:10.1002/jcu.1870030103

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

年代:1975

数据来源: WILEY

摘要:

AbstractResults are described ofin vitrobiological experimentation using a new through‐transmission ultrasonic camera system developed at the Stanford Research Institute. The camera system produces real‐time focused, orthographic images of a 15 × 15 cm field. Thein vitrostudies, which demonstrate the diagnostic potential of the new technique, include transmission images of selected excised organs such as liver, kidney, spleen, and uterus. In addition, preliminary studies evaluating ultrasonic image quality and the effect of out‐of‐focus structures are d

ISSN:0091-2751    

DOI:10.1002/jcu.1870030104

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

年代:1975

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870030102

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

年代:1975

数据来源: WILEY

摘要:

AbstractA new transmission ultrasound camera system has provided focused images in real time through the abdomen of adult volunteers at average incident sound intensity levels of less than 1 mW/cm2. The camera uses a unique acousto‐mechanical lens/deflection system and a linear array of piezoelectric transducers to detect the ultrasound image. Bony structures and costal cartilages were clearly seen. The colon was regularly seen and the kidney could be outlined in several subjects. The stomach and duodenal bulb were demonstrated and peristalsis was observed using a barium contrast material. The camera has the potential of extending the use of ultrasound in clinical medicine providing an ultrasound soft tissue imaging system analogous to an x‐ray fluoroscope. The need for further clinical evaluation and research to improve the images is emphasi

ISSN:0091-2751    

DOI:10.1002/jcu.1870030105

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

年代:1975

数据来源: WILEY

摘要:

AbstractThrough real time ultrasonography, it is possible to display the splenic vein, the superior mesenteric vein, the vena porta, and the intrahepatic portal and systemic veins. In jaundice, it is of the utmost importance to carefully identify the vena porta before making a diagnosis of common bile duct enlargement. It is also necessary, when confronted with a pattern of apparently enlarged intrahepatic ducts, to conduct a thorough study of possible confluences of the ducts with the vena porta or vena cava to be certain that the ducts are not part of the portal or systemic venous network. Without such differentiation, portal enlargement caused portal hypertension, systemic venous enlargement caused cardiac insufficiency, or even nonpathological wide veins may lead to an erroneous diagnosis of obstructive jaundice.

ISSN:0091-2751    

DOI:10.1002/jcu.1870030106

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

年代:1975

数据来源: WILEY

摘要:

AbstractThe interatrial septum was studied with B‐mode echocardiography to determine whether there were specific ultrasonic features characteristic of such congenital heart diseases as atrial septal defect and endocardial cushion defect. In transverse tomograms in the third and fourth intercostal space the interatrial septum is detected almost parallel to the anterior chest wall. The septum continues leftward to the echo of the anterior mitral leaflet. When the interatrial septum extends beyond the left sternal border, it can also be recorded near the left sternal border in the sagittal tomogram. The interatrial septum can also be recorded conventional echocardiography. The pattern is wavy and synchronous with the heart beat with an amplitude of about 10 mm. It is seen near the chest wall in patients with left atrial enlargement and far from the chest wall in patients with right atrial enlargement. The defect in the interatrial septum was visualized B‐mode and conventional echocardiogram in patients with ostium secundum atrial septal defect. The defects were no longer observed after surg

ISSN:0091-2751    

DOI:10.1002/jcu.1870030107

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

年代:1975

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870030108

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

年代:1975

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870030109

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

年代:1975

数据来源: WILEY

摘要:

AbstractThe use of an ultrasonic delay line and mechanical arm as a means of checking the registration of contact B‐scanners is described. The principle of operation is applicable to any make of equipment. The amount of misregistration can be assessed, and discontinuities or departures from the normal can be demonstrated in the transducer position sensing system. As an added benefit it is a rapid means of checking both picture size and the accuracy of electronic marker

ISSN:0091-2751    

DOI:10.1002/jcu.1870030110

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

年代:1975

数据来源: WILEY

摘要:

AbstractA system using television in a convenient format is described. Its applications include rapid, convenient review of studies clinicians and efficient presentation of data to groups of ultrasound trainees. The videotape capability of unit allows production of teaching aids for sharing with other labs.

ISSN:0091-2751    

DOI:10.1002/jcu.1870030111

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

年代:1975

数据来源: WILEY