Browsing Τμήμα Πληροφορικής / Department of Computer Science by Subject "Ultrasonics"
Now showing items 1-20 of 44
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Conference Object
AM-FM representations for the characterization of carotid plaque ultrasound Images
(2008)Stroke is the third leading cause of death in the western world and a major cause of disability in adults. The objective of this work was to investigate the use of AM-FM representations for the characterization of carotid ...
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Article
Assessment of stroke risk based on morphological ultrasound image analysis with conformal prediction
(2010)Non-invasive ultrasound imaging of carotid plaques allows for the development of plaque image analysis in order to assess the risk of stroke. In our work, we provide reliable confidence measures for the assessment of stroke ...
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Conference Object
Atherosclerotic carotid plaque texture variability in ultrasound video
(Springer Verlag, 2015)Ultrasound video of the common carotid artery (CCA) combined with texture feature analysis has the potential in differentiating between asymptomatic and symptomatic atherosclerotic carotid plaque and is used widely for the ...
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Conference Object
Atherosclerotic carotid wall segmentation in ultrasound images using Markov random fields
(2010)This work explores the segmentation of the intima-media complex (IMC) of the common carotid artery (CCA) wall for the evaluation of the intima media thickness (IMT) on B-mode ultrasound images. The IMT provides important ...
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Conference Object
Atherosclerotic plaque motion analysis from ultrasound videos
(2006)In this paper, we describe a collection of algorithms that are used to provide motion trajectory estimates from atherosclerotic plaque ultrasound videos. Our approach is based on the use of four different optical flow ...
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Article
Atherosclerotic plaque ultrasound video encoding, wireless transmission, and quality assessment using H.264
(2011)We propose a unifying framework for efficient encoding, transmission, and quality assessment of atherosclerotic plaque ultrasound video. The approach is based on a spatially varying encoding scheme, where video-slice ...
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Article
Classification of atherosclerotic carotid plaques using morphological analysis on ultrasound images
(2009)The aim of this study was to investigate the usefulness of multilevel binary and gray scale morphological analysis in the assessment of atherosclerotic carotid plaques. Ultrasound images were recorded from 137 asymptomatic ...
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Article
Despeckle filtering for multiscale amplitude-modulation frequency-modulation (AM-FM) texture analysis of ultrasound images of the intima-media complex
(2014)The intima-media thickness (IMT) of the common carotid artery (CCA) is widely used as an early indicator of cardiovascular disease (CVD). Typically, the IMT grows with age and this is used as a sign of increased risk of ...
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Conference Object
Despeckle filtering in ultrasound video of the common carotid artery
(2012)Noise reduction is essential for increasing the visual quality or as a preprocessing step for further automated analysis in video sequences and video coding. The objective of this work was to investigate four different ...
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Article
An effective ultrasound video communication system using despeckle filtering and HEVC
(2015)The recent emergence of the high-efficiency video coding (HEVC) standard promises to deliver significant bitrate savings over current and prior video compression standards, while also supporting higher resolutions that can ...
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Article
Evaluation of the risk of stroke with confidence predictions based on ultrasound carotid image analysis
(2012)Conformal Predictors (CPs) are Machine Learning algorithms that can provide reliable confidence measures to their predictions. In this work, we make use of the Conformal Prediction framework for the assessment of stroke ...
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Conference Object
A fully automated method using active contours for the evaluation of the intima-media thickness in carotid US images
(2011)The thickness of the intima-media complex (IMC) of the common carotid artery (CCA) wall is important in the evaluation of the risk for the development of atherosclerosis. This paper presents a fully automated algorithm for ...
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Conference Object
Global optimization for motion estimation with applications to ultrasound videos of carotid artery plaques
(2010)Motion estimation from digital video is an ill-posed problem that requires a regularization approach. Regularization introduces a smoothness constraint that can reduce the resolution of the velocity estimates. The problem ...
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Conference Object
HEVC encoding for reproducible medical ultrasound video diagnosis
(IEEE Computer Society, 2013)In this study, we investigate how the recently introduced high efficiency video coding (HEVC) standard can be used in the design of reproducible medical ultrasound video diagnosis systems. We introduce a set of clinical ...
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Conference Object
High efficiency video coding for ultrasound video communication in m-health systems
(2012)Emerging high efficiency video compression methods and wider availability of wireless network infrastructure will significantly advance existing m-health applications. For medical video communications, the emerging video ...
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Article
High-resolution, low-delay, and error-resilient medical ultrasound video communication using H.264/AVC over mobile WiMAX networks
(2013)In this study, we describe an effective video communication framework for the wireless transmission of H.264/AVC medical ultrasound video over mobile WiMAX networks. Medical ultrasound video is encoded using diagnostically ...
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Article
An integrated system for the segmentation of atherosclerotic carotid plaque ultrasound video
(2014)The robust border identification of atherosclerotic carotid plaque, the corresponding degree of stenosis of the common carotid artery (CCA), and also the characteristics of the arterial wall, including plaque size, ...
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Conference Object
M-mode state based identification in ultrasound videos of the atherosclerotic carotid plaque
(2010)Monitoring the wall and plaque changes in the carotid artery (CA) can provide useful information for the assessment of the atherosclerotic disease. Using a motion mode (M-mode) image, detailed information may be obtained ...
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Article
Manual and automated media and intima thickness measurements of the common carotid artery
(2009)The intima-media thickness (IMT) of the common carotid artery (CCA) is widely used as an early indicator of the development of cardiovascular disease (CVD). It was proposed but not thoroughly investigated that the media ...
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Conference Object
Measurement of motion of carotid bifurcation plaques
(2012)Video loops of B-mode ultrasound images of 35 carotid bifurcation plaques were obtained (4 symptomatic and 31 asymptomatic) from patients with carotid bifurcation atherosclerosis. Video loops were classified visually as ...