Results 321 to 330 of about 6,748,789 (382)
Some of the next articles are maybe not open access.
Doppler-free/Doppler-sliced ion imaging
Physical Chemistry Chemical Physics, 2006We demonstrate a hybrid Doppler-free/Doppler-sliced ion imaging approach that is well-suited for detection of H or D atoms. The method relies on 2 + 1 resonant ionization with identical, nearly counterpropagating beams that are coplanar but directed at a small angle relative to the detector face.
Cunshun, Huang +4 more
openaire +2 more sources
Transvaginal color Doppler imaging
Journal of Clinical Ultrasound, 1990AbstractTransvaginal color Doppler was used to assess circulation in pelvic vessels in a group of 64 patients including 15 patients with fertility problems, 18 patients with pelvic tumors, 2 cases of suspected ectopic pregnancy, and 29 pregnant patients with fetuses between 6 weeks and 10 weeks, menstrual age.Blood flow was successfully displayed by ...
A, Kurjak +3 more
openaire +2 more sources
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.
openaire +2 more sources
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.
openaire +2 more sources
Laser Doppler Perfusion Imaging
Conference on Lasers and Electro-Optics Europe, 1996Laser Doppler Perfusion Imaging (LDPI) creates two-dimensional flow-maps of the tissue perfusion. A laser beam scans the tissue surface step-wise by means of a computer controlled stepper motor system that forms an integral part of a camera-like device positioned above the tissue surface.
openaire +1 more source
1997
Current standard cardiac ultrasound techniques derive their information on myocardial function indirectly based either on parameters measured from the endo- and epicardial specular reflections or from blood pool Doppler indices.
George R. Sutherland +3 more
openaire +2 more sources
Current standard cardiac ultrasound techniques derive their information on myocardial function indirectly based either on parameters measured from the endo- and epicardial specular reflections or from blood pool Doppler indices.
George R. Sutherland +3 more
openaire +2 more sources
1981
The search for a practical, clinically applicable system for non-invasive detection and diagnosis of atherosclerosis followed early demonstrations that ultrasound could be used. Pulse-echo systems were the first to be investigated and showed that, although plaque could be visualized or its absorption properties made apparent in vivo, some types of ...
John M. Reid +2 more
openaire +1 more source
The search for a practical, clinically applicable system for non-invasive detection and diagnosis of atherosclerosis followed early demonstrations that ultrasound could be used. Pulse-echo systems were the first to be investigated and showed that, although plaque could be visualized or its absorption properties made apparent in vivo, some types of ...
John M. Reid +2 more
openaire +1 more source
Doppler echocardiography. II. Color Doppler imaging.
The Veterinary clinics of North America. Small animal practice, 1999Color Doppler imaging (CDI) is a sophisticated form of ultrasound technology that overlays blood flow and velocity information onto a B-mode, two-dimensional, gray-scale image. This imaging technique--also called color Doppler echocardiography, color-coded Doppler, Doppler color-flow imaging, and color-flow imaging--is a type of pulsed-wave Doppler ...
J D, Bonagura, M W, Miller
openaire +1 more source
International Journal of Imaging Systems and Technology, 1989
AbstractWe review various narrow‐band range‐Doppler imaging methods that have been proposed for radar and highlight the difficulties in their implementation and their limitations. We also present two new imaging schemes. The first involves the transmission of multiplexed chirps, and the second involves simple frequency division multiplexing. The second
openaire +1 more source
AbstractWe review various narrow‐band range‐Doppler imaging methods that have been proposed for radar and highlight the difficulties in their implementation and their limitations. We also present two new imaging schemes. The first involves the transmission of multiplexed chirps, and the second involves simple frequency division multiplexing. The second
openaire +1 more source
2002
The method of image reconstruction using the backprojection technique employed to create X-ray CT scans has been successfully applied to reconstruct images of targets rotating in a continuous wave ultrasonic beam.
Hai_Dong Liang +2 more
openaire +1 more source
The method of image reconstruction using the backprojection technique employed to create X-ray CT scans has been successfully applied to reconstruct images of targets rotating in a continuous wave ultrasonic beam.
Hai_Dong Liang +2 more
openaire +1 more source
Color Doppler Imaging in Uveitis
European Journal of Ophthalmology, 1997Purpose. To evaluate the vascular hemodynamic changes that can be detected with color Doppler imaging (CDI) in diagnosis, differential diagnosis and prognosis of uveitis with different etiologies including Behçet's disease. Methods. Four groups consisting of healthy volunteers, uveitis patients with different etiologies and Behçet's disease patients ...
H, Atilla +4 more
openaire +2 more sources