Results 31 to 40 of about 132,913 (262)

Multivendor Spectral-Domain Optical Coherence Tomography Dataset, Observer Annotation Performance Evaluation, and Standardized Evaluation Framework for Intraretinal Cystoid Fluid Segmentation

Journal of Ophthalmology, 2016
Development of image analysis and machine learning methods for segmentation of clinically significant pathology in retinal spectral-domain optical coherence tomography (SD-OCT), used in disease detection and prediction, is limited due to the availability
Jing Wu, Ana-Maria Philip, Dominika Podkowinski, Bianca S. Gerendas, Georg Langs, Christian Simader, Sebastian M. Waldstein, Ursula M. Schmidt-Erfurth   +7 more
doaj   +1 more source

A RPCA-Based ISAR Imaging Method for Micromotion Targets

Sensors, 2020
Micro-Doppler generated by the micromotion of a target contaminates the inverse synthetic aperture radar (ISAR) image heavily. To acquire a clear ISAR image, removing the Micro-Doppler is an indispensable task.
Liangyou Lu, Peng Chen, Lenan Wu
doaj   +1 more source

Orbital colour doppler imaging [PDF]

Eye, 1993
Colour Doppler imaging (CDI) is an ultrasonic method for qualitatively and quantitatively assessing blood flow. Recently this technique has been adapted for investigation of the orbital, optic nerve and ocular vasculature. We discuss the history, principles and methodology of this examination technique for ophthalmology.
N S, Aburn, R C, Sergott
openaire   +2 more sources

Principles of Doppler ultrasound and emerging blood flow imaging [PDF]

Ultrasonography
Doppler ultrasound is one of the oldest modalities for measuring and visualizing blood flow. This review paper explores the principles of Doppler ultrasound and blood flow imaging.
Dong-Guk Paeng, Cheong-Ah Lee, Cynthia Imtiaz   +2 more
doaj   +1 more source

Early Pregnancy Fetal Cardiac Activity Detection by Superb Micro-Vascular Imaging (cSMI) Comparing with Color Doppler Ultrasound

Pakistan Armed Forces Medical Journal, 2023
Objective: To observe the sonographic advancement of the Doppler technique Superb Microvascular imaging (cSMI) for detecting fetal cardiac activity (FCA) in early pregnancy when not detected on grey scale ultrasound and conventional Doppler.
Riffat Masud, Faisal Khurshid, Ghazal Jameel, Mussarat Ashraf   +3 more
doaj   +1 more source

Application of S-Transform Random Consistency in Inverse Synthetic Aperture Imaging Laser Radar Imaging

Applied Sciences, 2019
Under the same principle, laser radar could be more sensitive to the micro-Doppler (m-D) effect due to its wave length, as the characteristic of multi-resolution, S transform could reduce the influence of the micro-Doppler component and enhance the ...
Bo Zang, Mingzhe Zhu, Xianda Zhou, Lu Zhong, Zijiao Tian   +4 more
doaj   +1 more source

Streamline-based three-dimensional peak-velocity tracing of transvalvular flow using four-dimensional flow cardiac magnetic resonance imaging for left ventricular diastolic assessment in aortic regurgitation: a case report

Journal of Medical Case Reports, 2022
Background Doppler transthoracic echocardiography is routinely performed to measure peak mitral inflow velocities in the assessment of left ventricular diastolic function.
Paul Njoku, James Wardley, Pankaj Garg
doaj   +1 more source

POWER DOPPLER IMAGING IN PATIENTS WITH SUSPECTED PROSTATE CANCER

Вестник урологии, 2016
. This study was aimed to evaluate the role of power Doppler imaging in diagnosis of prostate cancer and prediction of its aggressiveness. This study included 118 patients with prostate cancer suspected due to elevation of prostate specific antigen (PSA)
T. V. Shatylko, L. N. Sedova, A. Yu. Korolev   +2 more
doaj   +1 more source

Doppler Imaging and Histology of the Synovium [PDF]

The Journal of Rheumatology, 2012
To the Editor: It is possible to examine the inflammation of a joint, bursa, or tendon area with ultrasonography (US) using greyscale or Doppler imaging1. The detection of perfusion in synovium is a relatively new phenomenon in rheumatology and the detection of a Doppler signal in the synovium is also thought to reflect the inflammatory state2 ...
openaire   +2 more sources

Speckles in laser Doppler perfusion imaging [PDF]

Optics Letters, 2006
We report on the quantitative influence of speckles in laser Doppler perfusion imaging. The influence of speckles on the signal amplitude and on the Doppler spectrum is demonstrated experimentally for particle suspensions with different scattering levels and various beam widths.
Rajan, V., Varghese, B., van Leeuwen, T. G., Steenbergen, W.   +3 more
openaire   +2 more sources