Results 211 to 220 of about 41,850 (265)
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Industrial Metrology, 1992
Abstract This paper gives an overview of research on the non-destructive testing of wood byultrasonics. The main topic of the paper is how ultrasonics may be used to characterize defects in logs and how to develop a way to scan logs in sawmill production.
Wei Han, Rolf Birkeland
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Abstract This paper gives an overview of research on the non-destructive testing of wood byultrasonics. The main topic of the paper is how ultrasonics may be used to characterize defects in logs and how to develop a way to scan logs in sawmill production.
Wei Han, Rolf Birkeland
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Ultrasonic Doppler Shift as an Aid to Diagnostic Ultrasonic Scanning
The Journal of the Acoustical Society of America, 1968The location of a pulsed ultrasonic scan within the body can be determined using an ultrasonic Doppler shift detector. The technique is also valuable for avoiding gas bubbles in the stomach or intestine, The scattered or reflected beam is detected by the receiving crystal of the Doppler unit. Localization of the pulsed beam is accomplished by searching
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The Journal of the Acoustical Society of America, 1995
Apparatus to measure the physical characteristic of an object. There is a main body to receive the object. There is a device to enable the operator to determine when the object is correctly on the body. A piezoelectric ultrasonic transmitter sends a signal through the object.
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Apparatus to measure the physical characteristic of an object. There is a main body to receive the object. There is a device to enable the operator to determine when the object is correctly on the body. A piezoelectric ultrasonic transmitter sends a signal through the object.
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Ultrasonic liver scanning: the quantitative analysis of the normal A-scan
Physics in Medicine & Biology, 1972Previous methods of interpreting ultrasonic liver scans are discussed. A system is described in which the performance was calibrated in terms of measurable quantities; this avoided any possibility of distortion being caused by observer bias. The results of the examinations of 30 individuals with normal livers are reported: 30 scans of each individual ...
R A, Mountford, P N, Wells
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RESIDUAL URINE DETERMINATION BY ULTRASONIC SCANNING
American Journal of Roentgenology, 1975In 14 patients with an indwelling catheter, 48 different determinations of bladder volume were made using 5 different ultrasonic methods. The simplest procedure, the largest sagittal diameter of the bladder in the median plane, gave only a rough estimate of the bladder volume.
J F, Pedersen, R J, Bartrum, C, Grytter
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Ultrasonic Scanning in Obstetrics
Australian and New Zealand Journal of Obstetrics and Gynaecology, 1969SummaryThe principles of diagnostic ultrasound, their application in obstetrics and some characteristic echogram patterns in pregnancy are presented.
J. Morrison, R. J. Blackwell
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Ultrasonic Scanning in the Diagnosis of Biliary Disease
Surgical Clinics of North America, 1973B-scan ultrasonography appears to be useful in cases of radiographic nonvisualization or where impairment of hepatobiliary function is severe enough to preclude attempts at oral cholecystography or intravenous cholangiography. Sonographic demonstration of a normal gallbladder is an excellent indicator of the absence of disease.
G R, Leopold, J, Sokoloff
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Identification of ultrasonic scanning pictures of the abdomen
Ultrasonics, 1971Abstract Ultrasonic scanning of the abdomen has been proved a valuable supplement to radiographic and isotopic investigations. Interpretation of the scans depends on identification of the scanning planes, for which a new principle is outlined.
H H, Holm +2 more
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CURRENT ASPECTS OF ULTRASONIC SCANNING OF THE PANCREAS
American Journal of Roentgenology, 1974Ultrasonic diagnosis readily supplies definite evidence of a pathologic process, but the interpretation of an abnormal ultrasonic scan presents difficulties.To interpret the scan, knowledge of the topographic criteria in assessing pathologic findings is necessary.The cited clinical examples demonstrate the usefulness of the topographic criteria devised
J, Burger, U W, Blauenstein
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Simplified image processing for ultrasonic scans
Physics in Medicine & Biology, 1976A system is described which achieves dynamic cardiac imaging by digital data storage without requiring complex instrumentation, employing, with a minimum of modification, data processing facilities already available and being used for analysis and display of gamma camera images. Thus, a conventional ultrasound B-scanner has been interfaced to a Hewlett-
K, Willson, S, Leeman
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