Results 211 to 220 of about 50,529 (255)

Color Doppler flow imaging.

American Journal of Roentgenology, 1991
The performance requirements and operational parameters of a color Doppler system are outlined. The ability of an operator to recognize normal and abnormal variations in physiologic flow and artifacts caused by noise and aliasing is emphasized. The use of color Doppler flow imaging is described for the vessels of the neck and extremities, upper abdomen
W D, Foley, S J, Erickson
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Assessment of Color Doppler Imaging Quality

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992
This paper describes a method for assessing some features representative of color doppler imaging quality. This method applies to slow continuous flow and permits measurements of the minimal velocity which can be represented by a color and the difference between the real velocity and the calculated velocity.
Daniel Winninger, Michel Claudon
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Color Doppler imaging of paragangliomas in the neck

Journal of Clinical Ultrasound, 1997
In this study, we describe the color Doppler imaging findings in carotid body tumors and vagal body tumors.B-mode and color Doppler imaging were performed on 17 patients who had a total of 25 previously diagnosed paragangliomas (14 carotid body tumors and 11 vagal body tumors).Nineteen of 25 tumors were depicted.
J C, Jansen, R J, Baatenburg de Jong, J, Schipper, A G, van der Mey, A P, van Gils   +4 more
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Doppler and color Doppler imaging in acute transplant failure

Journal of Clinical Ultrasound, 1992
AbstractMost renal transplants are lost by rejection. A method is required to identify and discriminate between this and acute tubular necrosis and cyclosporin toxicity. The sonogram of the normal renal transplant is characteristic. Early Doppler studies measuring a rise in vascular impedance in acute rejection showed a high sensitivity and specificity.
M, Pelling, P A, Dubbins
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Color doppler applications in hepatic imaging

Clinical Imaging, 1998
Color Doppler sonography is an important modality in the non-invasive evaluation of the liver. It is commonly used to evaluate vascular changes which accompany cirrhosis. Doppler techniques are also used to evaluate patients who have undergone liver transplantation or transjugular intrahepatic portosystemic shunt (TIPS) placement. This review describes
R S, Shapiro, A, Stancato-Pasik, N, Glajchen, S, Zalasin   +3 more
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Doppler colour flow imaging

Nature, 1987
AbstractBy simultaneous processing of frequency, phase, and amplitude information in the backscattered ultrasound signal, new instruments now permit the realtime display of high‐resolution grey scale images of tissue combined with the simultaneous display of flow data from vessels within the scan plane.
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Color Doppler imaging of the ocular vessels

Graefe's Archive for Clinical and Experimental Ophthalmology, 1995
Color Doppler imaging allows for simultaneous two-dimensional anatomical imaging and Doppler evaluation of blood flow velocity.We examined 40 normal eyes (17 males and 23 females, aged 16 to 57 years) with this technique. The color Doppler unit used in this study had a 5.0-MHz PLF-503 ST phased-array scanning head.
A, Mendívil, V, Cuartero, M P, Mendívil   +2 more
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Colour doppler imaging of the cystic artery

Clinical Radiology, 1992
AbstractColor Doppler ultrasonography was used to examine the gallbladder vascular supply in 30 volunteers and in 30 biliary lithotripsy patients pre‐ and 2 hours posttreatment. A preliminary study of 10 cases of acute cholecystitis was also performed.
F P, McGrath, S H, Lee, R G, Gibney
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COLOR DOPPLER IMAGING OF THE EYE AND ORBIT

Radiologic Clinics of North America, 1998
Since the development of A- and B-scan ultrasound technique in the 1950s, significant progress in ophthalmic ultrasound has appeared. As the technology advances and ultrasound systems improve their ability to acquire and detect ultrasonic signals and to analyze them in terms of a spatial resolution and frequency distribution, there is no doubt that the
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Basics of Color Doppler Imaging

1991
Color Doppler flow imaging (CDFI) is a relatively new ultrasound method to assess vascular function and morphology. Primarily introduced to echocardiography in the early 1980s [1–3], it has been more recently applied in vascular diagnostics [4]. The objective of this chapter is to describe the basic concepts applied in CDFI.
E. G. Cape, H.-W. Sung, A. P. Yoganathan
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