Browsing by Author "Loizou, Christos P."

Now showing items 1-20 of 69

    • Conference Object  

      An AM-FM model for motion estimation in atherosclerotic plaque videos 

      Murray, V.; Murillo, S. E.; Pattichis, Marios S.; Loizou, Christos P.; Pattichis, Constantinos S.; Kyriacou, Efthyvoulos C.; Nicolaïdes, Andrew N. (2007)
      We present new multidimensional Amplitude-Modulation Frequency-Modulation (AM-FM) methods for motion estimation. For a single AM-FM component we show that the optical flow constraint leads to separate equations for amplitude ...
    • Conference Object  

      AM-FM texture image analysis in brain white matter lesions in the progression of multiple sclerosis 

      Loizou, Christos P.; Murray, V.; Pattichis, Marios S.; Pantzaris, Marios C.; Pattichis, Constantinos S. (2010)
      We present the use of multiscale Amplitude Modulation Frequency Modulation (AM-FM) methods for analyzing brain white matter lesions that are associated with disease progression. We analyze lesions and normal appearing white ...
    • Conference Object  

      AM-FM texture image analysis in multiple sclerosis brain white matter lesions 

      Loizou, Christos P.; Murray, V.; Pattichis, Marios S.; Pantzaris, Marios C.; Seimenis, Ioannis; Pattichis, Constantinos S. (2010)
      In this study we investigate the use of multiscale Amplitude Modulation-Frequency Modulation (AM-FM) methods for analyzing brain white matter lesions that are associated with multiple sclerosis MRI lesions imaged at 0 and ...
    • Article  

      AM-FM texture image analysis of the intima and media layers of the carotid artery 

      Loizou, Christos P.; Murray, V.; Pattichis, Marios S.; Christodoulou, C. S.; Pantzaris, Marios C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S. (2009)
      The purpose of this paper is to propose the use of amplitude modulation-frequency modulation (AM-FM) features for describing atherosclerotic plaque features that are associated with clinical factors such as intima media ...
    • Book Chapter  

      Assessment of stroke by analysing carotid plaque morphology 

      Kyriacou, Efthyvoulos C.; Christodoulou, Christodoulos I.; Loizou, Christos P.; Pattichis, Marios S.; Pattichis, Constantinos S.; Kakkos, Stavros K.; Nicolaïdes, Andrew N. (IGI Global, 2009)
      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 morphological feature extraction techniques and the use of automatic ...
    • Conference Object  

      Atherosclerotic carotid plaque segmentation 

      Loizou, Christos P.; Pattichis, Constantinos S.; Istepanian, Robert Sh Habib; Pantzaris, Marios C.; Nicolaïdes, Andrew N. (2004)
      Atherosclerosis is the major cause of heart attack and stroke in the western world. In this paper we present a computerized method for segmenting the athrerosclerotic carotid plaque from ultrasound images. The method uses ...
    • Conference Object  

      Atherosclerotic carotid plaque texture variability in ultrasound video 

      Loizou, Christos P.; Pantzaris, Marios C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S. (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 ...
    • Conference Object  

      Atherosclerotic carotid wall segmentation in ultrasound images using Markov random fields 

      Petroudi, Styliani; Loizou, Christos P.; Pattichis, Constantinos S. (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 ...
    • Conference Object  

      Atherosclerotic plaque motion analysis from ultrasound videos 

      Murillo, S. E.; Pattichis, Marios S.; Loizou, Christos P.; Pattichis, Constantinos S.; Kyriacou, Efthyvoulos C.; Constantinides, Anthony G.; Nicolaïdes, Andrew N. (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 ...
    • Article  

      Atherosclerotic plaque ultrasound video encoding, wireless transmission, and quality assessment using H.264 

      Panayides, Andreas S.; Pattichis, Marios S.; Pattichis, Constantinos S.; Loizou, Christos P.; Pantzaris, Marios C.; Pitsillides, Andreas (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 ...
    • Conference Object  

      Brain MR image normalization in texture analysis of multiple sclerosis 

      Loizou, Christos P.; Pantzaris, Marios C.; Seimenis, Ioannis; Pattichis, Constantinos S. (2009)
      A problem that occurs in texture analysis and quantitative analysis of magnetic resonance imaging (MRI), is that the extracted results are not comparable between consecutive or repeated scans or, within the same scan, ...
    • Article  

      Brain white matter lesion classification in multiple sclerosis subjects for the prognosis of future disability 

      Loizou, Christos P.; Kyriacou, Efthyvoulos C.; Seimenis, Ioannis; Pantzaris, Marios C.; Petroudi, Styliani; Karaolis, Minas A.; Pattichis, Constantinos S. (2013)
      This study investigates the application of classification methods for the prognosis of future disability on MRI-detectable brain white matter lesions in subjects diagnosed with clinical isolated syndrome (CIS) of multiple ...
    • Article  

      Brain white matter lesions classification in multiple sclerosis subjects for the prognosis of future disability 

      Loizou, Christos P.; Kyriacou, Efthyvoulos C.; Seimenis, Ioannis; Pantzaris, Marios C.; Christodoulou, Chris C.; Pattichis, Constantinos S. (2011)
      This study investigates the application of classification methods for the prognosis of future disability on MRI-detectable brain white matter lesions in subjects diagnosed with clinical isolated syndrome (CIS) of multiple ...
    • Article  

      Comparative evaluation of despeckle filtering in ultrasound imaging of the carotid artery 

      Loizou, Christos P.; Pattichis, Constantinos S.; Christodoulou, Christodoulos I.; Istepanian, Robert Sh Habib; Pantzaris, Marios C.; Nicolaïdes, Andrew N. (2005)
      It is well-known that speckle is a multiplicative noise that degrades the visual evaluation in ultrasound imaging. The recent advancements in ultrasound instrumentation and portable ultrasound devices necessitate the need ...
    • Conference Object  

      A comparison of ultrasound intima media thickness measurements of the left and right common carotid artery 

      Loizou, Christos P.; Pattichis, Constantinos S.; Georghiou, N.; Griffin, Maura B.; Nicolaïdes, Andrew N. (2013)
      The intima-media thickness (IMT) of the common carotid artery (CCA) is an established indicator of cardiovascular disease (CVD). There have been reports about the difference between the left and the right sides of the CCA ...
    • Article  

      A Comparison of Ultrasound Intima-Media Thickness Measurements of the Left and Right Common Carotid Artery 

      Loizou, Christos P.; Nicolaïdes, Andrew N.; Kyriacou, Efthyvoulos C.; Georghiou, N.; Griffin, Maura B.; Pattichis, Constantinos S. (2015)
      The intima-media thickness (IMT) of the common carotid artery (CCA) is an established indicator of cardiovascular disease (CVD). There have been reports about the difference between the left and the right sides of the CCA ...
    • Conference Object  

      Completely automated multiresolution edge snapper (CAMES): A new technique for an accurate carotid ultrasound IMT measurement and its validation on a multi-institutional database 

      Molinari, F.; Loizou, Christos P.; Zeng, G.; Pattichis, Constantinos S.; Pantzaris, Marios C.; Liboni, W.; Nicolaïdes, Andrew N.; Suri, J. S. (2011)
      Since 2005, our research team has been developing automated techniques for carotid artery (CA) wall segmentation and intima-media thickness (IMT) measurement. We developed a snake-based technique (which we named CULEX 1,2), ...
    • Conference Object  

      De-speckle filtering in ultrasound imaging of the carotid artery 

      Christodoulou, Christodoulos I.; Loizou, Christos P.; Pattichis, Constantinos S.; Pantzaris, Marios C.; Kyriacou, Efthyvoulos C.; Pattichis, Marios S.; Schizas, Christos N.; Nicolaïdes, Andrew N. (2002)
      The main objective of this paper is to evaluate the classification performance of de-speckle filtering on ultrasound imaging of the carotid atherosclerotic plaque. The following procedure was investigated on 230 images ...
    • Book  

      Despeckle filtering algorithms and software for ultrasound imaging 

      Loizou, Christos P.; Pattichis, Constantinos S. (Morgan & Claypool Publishers, 2008)
    • Article  

      Despeckle filtering for multiscale amplitude-modulation frequency-modulation (AM-FM) texture analysis of ultrasound images of the intima-media complex 

      Loizou, Christos P.; Murray, V.; Pattichis, Marios S.; Pantzaris, Marios C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S. (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 ...