James Tropp

Summary

Affiliation: GE Healthcare
Country: USA

Publications

  1. ncbi Image brightening in samples of high dielectric constant
    James Tropp
    General Electric Medical Systems, 47697 Westinghouse Drive, Fremont, CA 94539, USA
    J Magn Reson 167:12-24. 2004
  2. ncbi Hyperpolarized 13C lactate, pyruvate, and alanine: noninvasive biomarkers for prostate cancer detection and grading
    Mark J Albers
    Department of Bioengineering, University of California San Francisco, San Francisco, California 94158 2330, USA
    Cancer Res 68:8607-15. 2008
  3. ncbi Multi-channel metabolic imaging, with SENSE reconstruction, of hyperpolarized [1-(13)C] pyruvate in a live rat at 3.0 tesla on a clinical MR scanner
    James Tropp
    GE Healthcare Technologies, Global Applied Sciences Lab, Fremont, CA, United States
    J Magn Reson 208:171-7. 2011
  4. ncbi Radiation damping and reciprocity in nuclear magnetic resonance: the replacement of the filling factor
    James Tropp
    GE Healthcare Technologies, Global Applied Sciences Lab, Fremont, CA, USA
    J Magn Reson 206:161-7. 2010
  5. ncbi Quantification of in vivo metabolic kinetics of hyperpolarized pyruvate in rat kidneys using dynamic 13C MRSI
    Tao Xu
    Department of Electrical Engineering, Stanford University, Stanford, CA, USA
    NMR Biomed 24:997-1005. 2011
  6. ncbi In vivo hyperpolarized 13C MR spectroscopic imaging with 1H decoupling
    Albert P Chen
    GE Healthcare, 11 Brunel Court, Suite 5116, Toronto, Ont, Canada M5V3Y3
    J Magn Reson 197:100-6. 2009
  7. ncbi Three-frequency RF coil designed for optimized imaging of hyperpolarized, 13C-labeled compounds
    Ileana Hancu
    GE Global Research Center, Niskayuna, New York, 12309, USA
    Magn Reson Med 60:928-33. 2008
  8. ncbi Metabolic imaging in the anesthetized rat brain using hyperpolarized [1-13C] pyruvate and [1-13C] ethyl pyruvate
    Ralph E Hurd
    Global Applied Science Laboratory, GE Healthcare, Menlo Park, California 94025, USA
    Magn Reson Med 63:1137-43. 2010
  9. ncbi Cerebral dynamics and metabolism of hyperpolarized [1-(13)C]pyruvate using time-resolved MR spectroscopic imaging
    Ralph E Hurd
    Global Applied Science Laboratory, GE Healthcare, Menlo Park, California 94025, USA
    J Cereb Blood Flow Metab 30:1734-41. 2010
  10. ncbi T(2) relaxation times of (13)C metabolites in a rat hepatocellular carcinoma model measured in vivo using (13)C-MRS of hyperpolarized [1-(13)C]pyruvate
    Yi Fen Yen
    Global Applied Science Laboratory, GE Healthcare, CA, USA
    NMR Biomed 23:414-23. 2010

Detail Information

Publications12

  1. ncbi Image brightening in samples of high dielectric constant
    James Tropp
    General Electric Medical Systems, 47697 Westinghouse Drive, Fremont, CA 94539, USA
    J Magn Reson 167:12-24. 2004
    ..An extended reciprocity formula for NMR reception, valid for an arbitrary electromagnetic Green's function, is also given in Appendix B...
  2. ncbi Hyperpolarized 13C lactate, pyruvate, and alanine: noninvasive biomarkers for prostate cancer detection and grading
    Mark J Albers
    Department of Bioengineering, University of California San Francisco, San Francisco, California 94158 2330, USA
    Cancer Res 68:8607-15. 2008
    ....
  3. ncbi Multi-channel metabolic imaging, with SENSE reconstruction, of hyperpolarized [1-(13)C] pyruvate in a live rat at 3.0 tesla on a clinical MR scanner
    James Tropp
    GE Healthcare Technologies, Global Applied Sciences Lab, Fremont, CA, United States
    J Magn Reson 208:171-7. 2011
    ..The signal to noise ratio in was in some instances unexpectedly high in the parallel images; variability of the polarization among different trials, plus partial volume effects, are noted as a possible cause of this...
  4. ncbi Radiation damping and reciprocity in nuclear magnetic resonance: the replacement of the filling factor
    James Tropp
    GE Healthcare Technologies, Global Applied Sciences Lab, Fremont, CA, USA
    J Magn Reson 206:161-7. 2010
    ..The predicted intrinsic linewidth, based upon three separate measurements of the efficiency, is 52.3 Hz, or 80% of the measured value...
  5. ncbi Quantification of in vivo metabolic kinetics of hyperpolarized pyruvate in rat kidneys using dynamic 13C MRSI
    Tao Xu
    Department of Electrical Engineering, Stanford University, Stanford, CA, USA
    NMR Biomed 24:997-1005. 2011
    ....
  6. ncbi In vivo hyperpolarized 13C MR spectroscopic imaging with 1H decoupling
    Albert P Chen
    GE Healthcare, 11 Brunel Court, Suite 5116, Toronto, Ont, Canada M5V3Y3
    J Magn Reson 197:100-6. 2009
    ..Narrower linewidth for the [1-(13)C] lactate resonance was observed in hyperpolarized (13)C MRSI data in vivo with (1)H decoupling...
  7. ncbi Three-frequency RF coil designed for optimized imaging of hyperpolarized, 13C-labeled compounds
    Ileana Hancu
    GE Global Research Center, Niskayuna, New York, 12309, USA
    Magn Reson Med 60:928-33. 2008
    ..Images at the three resonant frequencies of this coil are presented from an exam involving hyperpolarized (13)C compounds in vivo...
  8. ncbi Metabolic imaging in the anesthetized rat brain using hyperpolarized [1-13C] pyruvate and [1-13C] ethyl pyruvate
    Ralph E Hurd
    Global Applied Science Laboratory, GE Healthcare, Menlo Park, California 94025, USA
    Magn Reson Med 63:1137-43. 2010
    ..Hyperpolarized [1-(13)C]-ethyl pyruvate and [1-(13)C]-pyruvate metabolic imaging in normal brain is demonstrated and quantified in this feasibility and range-finding study...
  9. ncbi Cerebral dynamics and metabolism of hyperpolarized [1-(13)C]pyruvate using time-resolved MR spectroscopic imaging
    Ralph E Hurd
    Global Applied Science Laboratory, GE Healthcare, Menlo Park, California 94025, USA
    J Cereb Blood Flow Metab 30:1734-41. 2010
    ..A model for brain [1-(13)C]lactate, based on blood-brain transport kinetics, CBV, and the observed pyruvate dynamics is described...
  10. ncbi T(2) relaxation times of (13)C metabolites in a rat hepatocellular carcinoma model measured in vivo using (13)C-MRS of hyperpolarized [1-(13)C]pyruvate
    Yi Fen Yen
    Global Applied Science Laboratory, GE Healthcare, CA, USA
    NMR Biomed 23:414-23. 2010
    ..The study results show that the signal level and relaxivity of [1-(13)C]alanine may be promising biomarkers for HCC tumors. Its diagnostic values in HCC staging and treatment monitoring are yet to be explored...
  11. ncbi Hyperpolarized C-13 spectroscopic imaging of the TRAMP mouse at 3T-initial experience
    Albert P Chen
    Department of Radiology, University of California San Francisco, San Francisco, California, USA
    Magn Reson Med 58:1099-106. 2007
    ..135 cm(3) nominal spatial resolution. Elevated (13)C lactate (lac) was observed in both primary and metastatic tumors, demonstrating the feasibility of studying cellular bioenergetics in vivo with DNP hyperpolarized (13)C MRSI...
  12. ncbi Assessment of the specific absorption rate and calibration of decoupling parameters for proton decoupled carbon-13 MR spectroscopy at 3.0 T
    Moyoko Saito
    Biomedical Imaging Group, Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1 8 31 Midorigaoka, Ikeda, Osaka 563 8577, Japan
    Eur J Radiol 55:289-93. 2005
    ..Then, the decoupling conditions of a glucose solution phantom were systematically optimized with combinations of decoupling bandwidth and power. The reliability of this procedure was discussed in conjunction with IEC guidelines...