Results 221 to 230 of about 41,850 (265)

Microprocessor Control of an Ultrasonic Scanning Device

IFAC Proceedings Volumes, 2012
A mechanical device has been developed as an ophthalmic ultrasonic scanning probe. The device is composed of an oscillating probe where the ultrasound transducer is mounted, part of which is flexible so the probe can oscillate when energized. Electric current is supplied to two electromagnetic coils acting on two permanent magnets mounted on both sides
Yih-Choung Yu, Shailesh Shrestha, Ahsan I. Nawroj, Marcos Sotomayor, Richard Koplin   +4 more
openaire   +1 more source

Spleen Volume Determination by Ultrasonic Scanning

Scandinavian Journal of Haematology, 1973
In patients with splenomegaly, the volume of the spleen can be determined by ultrasonic scanning.Systematic studies were made to evaluate the accuracy and precision of the method. Compared with the weight of the removed spleens a standard deviation of 197 ml was found between calculated volume and splenic weight, but compared with known volumes of ...
S W, Rasmussen, B E, Christensen, H H, Holm, T, Kardel, B, Stigsby, M, Larsen   +5 more
openaire   +2 more sources

Intraoral ultrasonic scanning as a diagnostic aid

Journal of Cranio-Maxillofacial Surgery, 1987
Since ultrasonographic examination has the advantages of being non-invasive, rapid and easily reproducible, this technique can be a valuable aid in diagnosing oral lesions. However, the relatively large size of commercially available transducers and the acoustic attenuation by the air space within the oral cavity have been deterrents to the intraoral ...
H, Yoshida, H, Akizuki, K, Michi
openaire   +2 more sources

Ultrasonic B-scanning: a computer simulation

Physics in Medicine & Biology, 1980
A method has been developed which can predict the appearance and properties of B-scan images. The theoretical basis for the tissue models used, and the assumptions made in the simulation concerning the nature of pulse-echo imaging, are discussed.
J C, Bamber, R J, Dickinson
openaire   +2 more sources

Electronic sector scanning for ultrasonic diagnosis

Ultrasonics, 1968
Abstract The mechanical B-scan used in medical diagnosis has the main disadvantage that it does not provide instantaneous and continuous pictures as the A-scan does in the one-dimensional case. In this paper is described the development of an electronic sector scanning equipment especially for medical purposes.
openaire   +2 more sources

Ultrasonic scanning of the kidneys.

Annals of clinical and laboratory science, 1981
Recent improvement in imaging technology has enabled ultrasound to assume an increasingly vital role in the identification and evaluation of renal disease. Renal masses can be differentiated. The nonfunctioning kidney can be imaged and obstruction or inflammation diagnosed.
openaire   +1 more source

Liver volume determination by ultrasonic scanning

The British Journal of Radiology, 1972
Abstract A new principle used for determining liver volume by means of ultrasonic scanning is described. Based upon a single transverse and a series of longitudinal scanning sections through the liver a model of the organ is defined. The outline of the liver in each scanning section is registered by means of an electronic Pencilfollower D-Mac Co. Ltd.,
openaire   +3 more sources

Ultrasonic b‐scanning in Rhesus incompatibility

Journal of Clinical Ultrasound, 1974
AbstractThree patients are presented with pregnancies complicated by Rhesus incompatibility. The presence of fetal ascites in hydrops fetalis is demonstrated with ultrasonic B‐scanning and compared with conventional radiographs. The value of localizing the placenta and estimating its volume is discussed.
openaire   +2 more sources

Echo-Doppler (duplex) ultrasonic scanning

Journal of Vascular Surgery, 1985
The combination of pulsed echo with pulsed Doppler provides a system that is capable of imaging peripheral arteries and veins and evaluating velocity patterns across suspected areas of narrowing. The method has been most widely applied to the evaluation of carotid artery disease for the detection and grading of lesions in the carotid bulb.
openaire   +2 more sources

Practical Considerations in Abdominal Ultrasonic Scanning

New England Journal of Medicine, 1974
THE use of ultrasound to diagnose intra-abdominal disease is rapidly expanding.1 2 3 4 Although much has been written and presented concerning interpretation of ultrasonic scans, little information is available on the technic of producing scans of diagnostic quality.
openaire   +2 more sources