Rafeef Abugharbieh

Summary

Publications

  1. doi request reprint Efficient interactive 3D Livewire segmentation of complex objects with arbitrary topology
    Miranda Poon
    Biomedical Signal and Image Computing Laboratory, University of British Columbia, Vancouver, British Columbia, Canada
    Comput Med Imaging Graph 32:639-50. 2008
  2. ncbi request reprint 3D ultrasound-CT registration in orthopaedic trauma using GMM registration with optimized particle simulation-based data reduction
    Ilker Hacihaliloglu
    Departments of Orthopaedics, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 15:82-9. 2012
  3. ncbi request reprint Functional segmentation of fMRI data using adaptive non-negative sparse PCA (ANSPCA)
    Bernard Ng
    Biomedical Signal and Image Computing Lab, Department of Electrical Engineering The University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 12:490-7. 2009
  4. ncbi request reprint A fuzzy region-based hidden markov model for partial-volume classification in brain MRI
    Albert Huang
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 12:474-81. 2009
  5. doi request reprint Focusing effects of L-dopa in Parkinson's disease
    Bernard Ng
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada
    Hum Brain Mapp 31:88-97. 2010
  6. ncbi request reprint Bone segmentation and fracture detection in ultrasound using 3D local phase features
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 11:287-95. 2008
  7. doi request reprint Automatic bone localization and fracture detection from volumetric ultrasound images using 3-D local phase features
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Ultrasound Med Biol 38:128-44. 2012
  8. doi request reprint Automatic adaptive parameterization in local phase feature-based bone segmentation in ultrasound
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Ultrasound Med Biol 37:1689-703. 2011
  9. ncbi request reprint Characterizing task-related temporal dynamics of spatial activation distributions in fMRI BOLD signals
    Bernard Ng
    Department of Electrical and Computer Engineering, Pacific Parkinson s Research Center, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 10:767-74. 2007
  10. doi request reprint Modeling brain activation in fMRI using group MRF
    Bernard Ng
    Biomedical Signal and Image Computing Lab, The University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
    IEEE Trans Med Imaging 31:1113-23. 2012

Detail Information

Publications25

  1. doi request reprint Efficient interactive 3D Livewire segmentation of complex objects with arbitrary topology
    Miranda Poon
    Biomedical Signal and Image Computing Laboratory, University of British Columbia, Vancouver, British Columbia, Canada
    Comput Med Imaging Graph 32:639-50. 2008
    ....
  2. ncbi request reprint 3D ultrasound-CT registration in orthopaedic trauma using GMM registration with optimized particle simulation-based data reduction
    Ilker Hacihaliloglu
    Departments of Orthopaedics, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 15:82-9. 2012
    ..We show an 89% average improvement in target registration error over the recent GMM registration based method...
  3. ncbi request reprint Functional segmentation of fMRI data using adaptive non-negative sparse PCA (ANSPCA)
    Bernard Ng
    Biomedical Signal and Image Computing Lab, Department of Electrical Engineering The University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 12:490-7. 2009
    ..Furthermore, when applied to real fMRI data, our method successfully segmented the Brodmann area 6 into its known functional sub-regions, whereas other conventional methods that we examined failed to attain such delineation...
  4. ncbi request reprint A fuzzy region-based hidden markov model for partial-volume classification in brain MRI
    Albert Huang
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 12:474-81. 2009
    ..Quantitative results demonstrate the advantages of our fuzzy model over the discrete approach with significant improvements in classification accuracy (30% reduction in mean square error)...
  5. doi request reprint Focusing effects of L-dopa in Parkinson's disease
    Bernard Ng
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada
    Hum Brain Mapp 31:88-97. 2010
    ..This observation is consistent with modeling studies, which demonstrated that dopamine increases the signal-to-noise ratio at the neuronal level with a resultant focusing of representations at the macroscopic level...
  6. ncbi request reprint Bone segmentation and fracture detection in ultrasound using 3D local phase features
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 11:287-95. 2008
    ..62 mm and mean errors in estimating fracture displacements below 0.65 mm, which will likely be of strong clinical utility...
  7. doi request reprint Automatic bone localization and fracture detection from volumetric ultrasound images using 3-D local phase features
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Ultrasound Med Biol 38:128-44. 2012
    ..6 mm. The results show that the proposed method is successful even for situations when the bone surface response is weak due to shadowing from muscle and fascia interfaces above the bone, which is a situation where the 2-D method fails...
  8. doi request reprint Automatic adaptive parameterization in local phase feature-based bone segmentation in ultrasound
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Ultrasound Med Biol 37:1689-703. 2011
    ..Results from a pilot in vivo study on human subjects, scanned in the operating room, show similar improvements...
  9. ncbi request reprint Characterizing task-related temporal dynamics of spatial activation distributions in fMRI BOLD signals
    Bernard Ng
    Department of Electrical and Computer Engineering, Pacific Parkinson s Research Center, University of British Columbia, Vancouver, BC, Canada
    Med Image Comput Comput Assist Interv 10:767-74. 2007
    ..This suggests that temporal dynamics of the spatial distribution of BOLD signal provide additional information regarding task-related activation thus complementing conventional intensity-based approaches...
  10. doi request reprint Modeling brain activation in fMRI using group MRF
    Bernard Ng
    Biomedical Signal and Image Computing Lab, The University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
    IEEE Trans Med Imaging 31:1113-23. 2012
    ..We validate our technique on synthetic and real fMRI data and demonstrate GMRF's superior performance over standard fMRI analysis...
  11. ncbi request reprint Joint spatial denoising and active region of interest delineation in functional magnetic resonance imaging
    Bernard Ng
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4 Canada
    Conf Proc IEEE Eng Med Biol Soc 2007:3404-7. 2007
    ..g. spatial variance) results in greater effect size in another feature (e.g. average activation statistics magnitude). Our results demonstrate the importance of accurate ROI delineation in ROI-based fMRI analysis...
  12. ncbi request reprint Invariant SPHARM shape descriptors for complex geometry in MR region of interest analysis
    Ashish Uthama
    Biomedical Signal and Image Computing Lab, Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, Canada
    Conf Proc IEEE Eng Med Biol Soc 2007:1322-5. 2007
    ..We also apply our approach to real MRI data and detect significant shape changes in the left and right thalamus in Parkinson's disease (PD) patients when compared against normal volunteers, complementing the observed volumetric changes...
  13. doi request reprint Motor reserve and novel area recruitment: amplitude and spatial characteristics of compensation in Parkinson's disease
    Samantha J Palmer
    Pacific Parkinson s Research Center, Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, Canada
    Eur J Neurosci 29:2187-96. 2009
    ..Our results suggest that PD subjects tap into motor reserve, increase the spatial extent of activation and demonstrate NAR to maintain near-normal motor output...
  14. doi request reprint 3-D scalable medical image compression with optimized volume of interest coding
    Victor Sanchez
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC V6T1Z4, Canada
    IEEE Trans Med Imaging 29:1808-20. 2010
    ....
  15. ncbi request reprint Discovering sparse functional brain networks using group replicator dynamics (GRD)
    Bernard Ng
    Biomedical Signal and Image Computing Lab, Department of Electrical Engineering, Pacific Parkinson s Research Center, The University of British Columbia, Vancouver, BC, Canada
    Inf Process Med Imaging 21:76-87. 2009
    ..We validated our method on synthetic data, and applying it to real fMRI data detected task-specific group networks that conform well with prior neuroscience knowledge...
  16. pmc A hybrid geometric-statistical deformable model for automated 3-D segmentation in brain MRI
    Albert Huang
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
    IEEE Trans Biomed Eng 56:1838-48. 2009
    ..55% ( p < 0.0001) and 10.18% ( p < 0.0001), respectively...
  17. ncbi request reprint Multi-contrast MR for enhanced bone imaging and segmentation
    Rupin Dalvi
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
    Conf Proc IEEE Eng Med Biol Soc 2007:5620-3. 2007
    ..Improvements in contrast to noise ratio of 39.24 and in sensitivity and specificity of 4.09% and 4.17%, respectively, for the tibia, and 4.4% and 5.74% for the femur, were achieved...
  18. doi request reprint Group replicator dynamics: a novel group-wise evolutionary approach for sparse brain network detection
    Bernard Ng
    Biomedical Signal and Image Computing Laboratory BiSICL, The University of British Columbia, Vancouver, BC, Canada
    IEEE Trans Med Imaging 31:576-85. 2012
    ..When applied to real fMRI data, GRD detected task-specific networks that conform well to prior neuroscience knowledge...
  19. ncbi request reprint Towards real-time 3D US to CT bone image registration using phase and curvature feature based GMM matching
    Anna Brounstein
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, B C, Canada
    Med Image Comput Comput Assist Interv 14:235-42. 2011
    ..We present quantitative and qualitative results on both phantom and clinical pelvis data and show a mean registration time of 2.11 s with a mean accuracy of 0.49 mm...
  20. pmc Shape (but not volume) changes in the thalami in Parkinson disease
    Martin J McKeown
    Pacific Parkinson s Research Center, University of British Columbia, Vancouver, Canada
    BMC Neurol 8:8. 2008
    ..Our objective was to determine if changes in the thalami could be non-invasively detected in structural MRI images obtained from subjects with Parkinson disease (PD), compared to age-matched controls...
  21. doi request reprint A novel rotationally invariant region-based hidden Markov model for efficient 3-D image segmentation
    Albert Huang
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
    IEEE Trans Image Process 19:2737-48. 2010
    ..For the brain MRI data, our white matter and gray matter segmentation resulted in substantially higher robustness and accuracy levels with improved Dice similarity indices of 4.60% (p=0.0022) and 7.71% , respectively...
  22. doi request reprint Efficient lossless compression of 4-D medical images based on the advanced video coding scheme
    Victor Sanchez
    Department of Electrical andComputer Engineering, The University of British Columbia, Vancouver, BC V6T1Z4, Canada
    IEEE Trans Inf Technol Biomed 12:442-6. 2008
    ....
  23. doi request reprint Bone surface localization in ultrasound using image phase-based features
    Ilker Hacihaliloglu
    Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada
    Ultrasound Med Biol 35:1475-87. 2009
    ..40 mm. Furthermore, small gaps between bone fragments can be detected with fracture displacement mean error below 0.33 mm for vertical misalignments, and 0.47 mm for horizontal misalignments...
  24. doi request reprint Novel lossless FMRI image compression based on motion compensation and customized entropy coding
    Victor Sanchez
    Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
    IEEE Trans Inf Technol Biomed 13:645-55. 2009
    ..264/AVC. Quantitative results demonstrate that our proposed technique significantly outperforms current state of the art with an average compression ratio improvement of 13%...
  25. ncbi request reprint Increasing the effect size in event-related fMRI studies
    Martin J McKeown
    Pacific Parkinson s Research Centre, University of British Columbia, University Hospital, Vancouver
    IEEE Eng Med Biol Mag 25:91-101. 2006