K G Helmer

Summary

Affiliation: Harvard University
Country: USA

Publications

  1. ncbi request reprint Water movement in tendon in response to a repeated static tensile load using one-dimensional magnetic resonance imaging
    K G Helmer
    Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
    J Biomech Eng 128:733-41. 2006
  2. pmc Enabling collaborative research using the Biomedical Informatics Research Network (BIRN)
    Karl G Helmer
    Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, Massachusetts, USA
    J Am Med Inform Assoc 18:416-22. 2011
  3. ncbi request reprint Measurement of the spatial redistribution of water in rabbit Achilles tendon in response to static tensile loading
    K G Helmer
    Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
    J Biomech Eng 126:651-6. 2004
  4. ncbi request reprint Spatial characterization of T1 and T2 relaxation times and the water apparent diffusion coefficient in rabbit Achilles tendon subjected to tensile loading
    J Wellen
    Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
    Magn Reson Med 53:535-44. 2005
  5. ncbi request reprint Application of porous-media theory to the investigation of water ADC changes in rabbit Achilles tendon caused by tensile loading
    J Wellen
    Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
    J Magn Reson 170:49-55. 2004

Collaborators

Detail Information

Publications5

  1. ncbi request reprint Water movement in tendon in response to a repeated static tensile load using one-dimensional magnetic resonance imaging
    K G Helmer
    Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
    J Biomech Eng 128:733-41. 2006
    ..The time constants of water movements were very different from the time constants of mechanical relaxation, indicating that water redistribution is not the sole determining factor of mechanical behavior...
  2. pmc Enabling collaborative research using the Biomedical Informatics Research Network (BIRN)
    Karl G Helmer
    Athinoula A Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, Massachusetts, USA
    J Am Med Inform Assoc 18:416-22. 2011
    ..The goal of the Biomedical Informatics Research Network (BIRN) is to address the challenges inherent in biomedical data sharing...
  3. ncbi request reprint Measurement of the spatial redistribution of water in rabbit Achilles tendon in response to static tensile loading
    K G Helmer
    Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA
    J Biomech Eng 126:651-6. 2004
    ..The rate for the 5N load case was 0.010 +/- 0.002 min(-1) and 0.007 +/- 0.002 min(-1) in the 10N case. Thus, while generally consistent with an extrusion model, the data show other features that argue for a more complex model...
  4. ncbi request reprint Spatial characterization of T1 and T2 relaxation times and the water apparent diffusion coefficient in rabbit Achilles tendon subjected to tensile loading
    J Wellen
    Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
    Magn Reson Med 53:535-44. 2005
    ..A measure reflective of the regional change in proton density was noted to be consistent with tensile-load-induced water transport from the central to the peripheral tendon region...
  5. ncbi request reprint Application of porous-media theory to the investigation of water ADC changes in rabbit Achilles tendon caused by tensile loading
    J Wellen
    Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
    J Magn Reson 170:49-55. 2004
    ..The resulting increase in water ADC with increasing diffusion time was attributed to multiple components arising from the (overlapping) distribution of T1 values in the core and rim regions of the tendon...