Ryan J Halter

Summary

Affiliation: Dartmouth Medical School
Country: USA

Publications

  1. doi request reprint Genetic and least squares algorithms for estimating spectral EIS parameters of prostatic tissues
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 29:S111-23. 2008
  2. pmc Electrical properties of prostatic tissues: II. Spectral admittivity properties
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    J Urol 182:1608-13. 2009
  3. pmc The correlation of in vivo and ex vivo tissue dielectric properties to validate electromagnetic breast imaging: initial clinical experience
    Ryan J Halter
    Thayer School of Engineering, Darmouth College, Hanover, NH 03755, USA
    Physiol Meas 30:S121-36. 2009
  4. doi request reprint Imaging forearm blood flow with pulse-ox gated electrical impedance tomography
    R J Halter
    Thayer School of Engineering at Dartmouth College, Hanover, NH 03755, USA
    Conf Proc IEEE Eng Med Biol Soc 2008:1192-5. 2008
  5. doi request reprint Passive bioelectrical properties for assessing high- and low-grade prostate adenocarcinoma
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    Prostate 71:1759-67. 2011
  6. pmc Video rate electrical impedance tomography of vascular changes: preclinical development
    Ryan Halter
    Dartmouth College, Thayer School of Engineering, Hanover, NH 03755, USA
    Physiol Meas 29:349-64. 2008
  7. doi request reprint Electrical impedance spectroscopy of benign and malignant prostatic tissues
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    J Urol 179:1580-6. 2008
  8. doi request reprint A broadband high-frequency electrical impedance tomography system for breast imaging
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    IEEE Trans Biomed Eng 55:650-9. 2008
  9. ncbi request reprint Experimental justification for using 3D conductivity reconstructions in electrical impedance tomography
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 28:S115-27. 2007
  10. ncbi request reprint Electrical impedance spectroscopy of the human prostate
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    IEEE Trans Biomed Eng 54:1321-7. 2007

Detail Information

Publications15

  1. doi request reprint Genetic and least squares algorithms for estimating spectral EIS parameters of prostatic tissues
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 29:S111-23. 2008
    ..01) were observed between CaP and BPH for the spectral parameters Deltarho and f(c); this is especially important since current prostate cancer screening methods do not reliably differentiate between these two tissue types...
  2. pmc Electrical properties of prostatic tissues: II. Spectral admittivity properties
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    J Urol 182:1608-13. 2009
    ..The frequency dependence of these properties is also a function of tissue morphology. We evaluated the potential of this spectral dependence to provide additional diagnostic information for prostate cancer detection...
  3. pmc The correlation of in vivo and ex vivo tissue dielectric properties to validate electromagnetic breast imaging: initial clinical experience
    Ryan J Halter
    Thayer School of Engineering, Darmouth College, Hanover, NH 03755, USA
    Physiol Meas 30:S121-36. 2009
    ..We present these results in addition to a case study demonstrating how discrete point spectroscopy measurements of the tissue can be correlated and used to validate EM imaging studies...
  4. doi request reprint Imaging forearm blood flow with pulse-ox gated electrical impedance tomography
    R J Halter
    Thayer School of Engineering at Dartmouth College, Hanover, NH 03755, USA
    Conf Proc IEEE Eng Med Biol Soc 2008:1192-5. 2008
    ..19 Hz and 1.21 Hz for the plethysmography trace and conductivity trace, respectively. This preliminary data suggests that EIT may be sensitive enough to visualize cardiac-based pulsatility in the peripheral vessels of the forearm...
  5. doi request reprint Passive bioelectrical properties for assessing high- and low-grade prostate adenocarcinoma
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    Prostate 71:1759-67. 2011
    ..Because Gleason grading is also based on tissue architecture we explored the hypothesis that the electrical properties might also provide discriminating power between high- and low-Gleason grade cancers...
  6. pmc Video rate electrical impedance tomography of vascular changes: preclinical development
    Ryan Halter
    Dartmouth College, Thayer School of Engineering, Hanover, NH 03755, USA
    Physiol Meas 29:349-64. 2008
    ..The distinguishability analysis suggests that a system such as the one developed here may provide a means to characterize the hemodynamics associated with blood flow through the peripheral vasculature...
  7. doi request reprint Electrical impedance spectroscopy of benign and malignant prostatic tissues
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    J Urol 179:1580-6. 2008
    ..We used electrical impedance spectroscopy to evaluate how significantly the electrical properties of benign and malignant prostatic tissues differ with the goal of providing clinicians with a new biomarker to aid in diagnosis...
  8. doi request reprint A broadband high-frequency electrical impedance tomography system for breast imaging
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    IEEE Trans Biomed Eng 55:650-9. 2008
    ..0237 S/m at 10 kHz to 0.2174 S/m at 10 MHz. These findings are consistent with impedance values reported in the literature...
  9. ncbi request reprint Experimental justification for using 3D conductivity reconstructions in electrical impedance tomography
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 28:S115-27. 2007
    ..2 in the particular case presented here. These findings should ultimately be incorporated to clinical imaging with EIT when circular electrode arrays are employed...
  10. ncbi request reprint Electrical impedance spectroscopy of the human prostate
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    IEEE Trans Biomed Eng 54:1321-7. 2007
    ..This is in agreement with trends observed in other tissues reported in much of the literature. Expanded studies are needed to further validate this finding and to explore the biological mechanism responsible for generating the results...
  11. pmc Electrical properties of prostatic tissues: I. Single frequency admittivity properties
    Ryan J Halter
    Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, USA
    J Urol 182:1600-7. 2009
    ..We evaluated how well these electrical properties discriminate cancer from noncancer tissues in the prostate...
  12. doi request reprint Arbitrary geometry patient interfaces for breast cancer detection and monitoring with electrical impedance tomography
    Preston Manwaring
    Thayer School of Engineering, Dartmouth College, 8000 Cummings Hall, Hanover, NH 03755, USA
    Conf Proc IEEE Eng Med Biol Soc 2008:1178-80. 2008
    ..Preliminary experimental results are presented...
  13. ncbi request reprint Excitation patterns in three-dimensional electrical impedance tomography
    Hamid Dehghani
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 26:S185-97. 2005
    ..However, in terms of quantitative imaging an excitation pattern where all electrode layers are in phase produces better results...
  14. ncbi request reprint Design and implementation of a high frequency electrical impedance tomography system
    Ryan Halter
    Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
    Physiol Meas 25:379-90. 2004
    ..Signal generation and detection, software design and preliminary system specifications are discussed...
  15. pmc Intracranial electrical impedance tomography: a method of continuous monitoring in an animal model of head trauma
    Preston K Manwaring
    Thayer School of Engineering, Dartmouth College, 14 Engineering Way, Hanover, NH 03755
    Anesth Analg 117:866-75. 2013
    ..Conductivity difference images are shown in conjunction with ICP data, confirming the effects...