Zhifei Wen

Summary

Affiliation: Stanford University
Country: USA

Publications

  1. ncbi request reprint Robust x-ray tubes for use within magnetic fields of MR scanners
    Zhifei Wen
    Department of Radiology and Department of Physics, Stanford University, Stanford, California 94305, USA
    Med Phys 32:2327-36. 2005
  2. ncbi request reprint Iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL): application with fast spin-echo imaging
    Scott B Reeder
    Department of Radiology, Stanford University Medical Center, Stanford, California, USA
    Magn Reson Med 54:636-44. 2005
  3. ncbi request reprint Truly hybrid X-ray/MR imaging: toward a streamlined clinical system
    Arundhuti Ganguly
    Department of Radiology, Stanford University, Lucas MRS Center, 1201 Pasteur Dr, Stanford, CA 94305, USA
    Acad Radiol 12:1167-77. 2005
  4. ncbi request reprint Investigation of electron trajectories of an x-ray tube in magnetic fields of MR scanners
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 34:2048-58. 2007
  5. ncbi request reprint Cramér-Rao bounds for three-point decomposition of water and fat
    Angel R Pineda
    Department of Radiology, Stanford University Medical Center, Stanford, California 94305, USA
    Magn Reson Med 54:625-35. 2005
  6. pmc Noise considerations of three-point water-fat separation imaging methods
    Zhifei Wen
    Department of Physics, Stanford University, Stanford, California 94305, USA
    Med Phys 35:3597-606. 2008
  7. ncbi request reprint Study of increased radiation when an x-ray tube is placed in a strong magnetic field
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 34:408-18. 2007
  8. pmc Shimming with permanent magnets for the x-ray detector in a hybrid x-ray/ MR system
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 35:3895-902. 2008
  9. ncbi request reprint MR-guided transjugular intrahepatic portosystemic shunt creation with use of a hybrid radiography/MR system
    Stephen T Kee
    Department of Radiology, Stanford University, California 94305, USA
    J Vasc Interv Radiol 16:227-34. 2005
  10. ncbi request reprint Multicoil Dixon chemical species separation with an iterative least-squares estimation method
    Scott B Reeder
    Department of Radiology, Stanford University Medical Center, Stanford, California 94304, USA
    Magn Reson Med 51:35-45. 2004

Collaborators

Detail Information

Publications12

  1. ncbi request reprint Robust x-ray tubes for use within magnetic fields of MR scanners
    Zhifei Wen
    Department of Radiology and Department of Physics, Stanford University, Stanford, California 94305, USA
    Med Phys 32:2327-36. 2005
    ..Results show that both correction schemes enhance the robustness of the x-ray tube operation in an externally applied magnetic field...
  2. ncbi request reprint Iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL): application with fast spin-echo imaging
    Scott B Reeder
    Department of Radiology, Stanford University Medical Center, Stanford, California, USA
    Magn Reson Med 54:636-44. 2005
    ..Close agreement between theoretical and experimental results obtained from an oil-water phantom was observed, demonstrating that the iterative least-squares decomposition method is an efficient estimator...
  3. ncbi request reprint Truly hybrid X-ray/MR imaging: toward a streamlined clinical system
    Arundhuti Ganguly
    Department of Radiology, Stanford University, Lucas MRS Center, 1201 Pasteur Dr, Stanford, CA 94305, USA
    Acad Radiol 12:1167-77. 2005
    ..5T GE Signa-SP magnet (SP-XMR). This paper describes the methods for increased compatibility between the upgraded x-ray and MR systems that have helped improve patient management...
  4. ncbi request reprint Investigation of electron trajectories of an x-ray tube in magnetic fields of MR scanners
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 34:2048-58. 2007
    ..In a weak magnetic field (B < or = E/c), the main deflection is in the E x B direction and is caused by the perpendicular component of the magnetic field...
  5. ncbi request reprint Cramér-Rao bounds for three-point decomposition of water and fat
    Angel R Pineda
    Department of Radiology, Stanford University Medical Center, Stanford, California 94305, USA
    Magn Reson Med 54:625-35. 2005
    ..These theoretical results were verified using Monte Carlo simulations with a newly developed nonlinear least-squares reconstruction algorithm that achieves the CRB...
  6. pmc Noise considerations of three-point water-fat separation imaging methods
    Zhifei Wen
    Department of Physics, Stanford University, Stanford, California 94305, USA
    Med Phys 35:3597-606. 2008
    ....
  7. ncbi request reprint Study of increased radiation when an x-ray tube is placed in a strong magnetic field
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 34:408-18. 2007
    ..Good agreement was observed between experimental data and simulation results. The wide spatial distribution of secondary x-ray emission can degrade the MTF of the x-ray system at low spatial frequencies for B < 0.5 T...
  8. pmc Shimming with permanent magnets for the x-ray detector in a hybrid x-ray/ MR system
    Zhifei Wen
    Department of Radiology, Stanford University, Stanford, California 94305, USA
    Med Phys 35:3895-902. 2008
    ..Experimental results demonstrate great promise for this technique, which may be useful in many settings where devices with magnetic components need to be placed inside or close to an MR scanner...
  9. ncbi request reprint MR-guided transjugular intrahepatic portosystemic shunt creation with use of a hybrid radiography/MR system
    Stephen T Kee
    Department of Radiology, Stanford University, California 94305, USA
    J Vasc Interv Radiol 16:227-34. 2005
    ..To evaluate the performance of a combined hybrid radiography/magnetic resonance (MR) unit to guide portal vein (PV) puncture during human transjugular intrahepatic portosystemic shunt (TIPS) creation...
  10. ncbi request reprint Multicoil Dixon chemical species separation with an iterative least-squares estimation method
    Scott B Reeder
    Department of Radiology, Stanford University Medical Center, Stanford, California 94304, USA
    Magn Reson Med 51:35-45. 2004
    ..An analysis of the noise performance of this method is described, and methods to improve noise performance through multicoil acquisition and field map smoothing are discussed...
  11. ncbi request reprint Iterative projection reconstruction of time-resolved images using highly-constrained back-projection (HYPR)
    Rafael L O'Halloran
    Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, USA
    Magn Reson Med 59:132-9. 2008
    ....
  12. ncbi request reprint Compatibility of interventional x-ray and magnetic resonance imaging: feasibility of a closed bore XMR (CBXMR) system
    Lukasz Brzozowski
    Department of Medical Biophysics, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
    Med Phys 33:3033-45. 2006
    ..The homogeneity of the MRI signal in the normal field of view was not significantly degraded by the presence of these x-ray components in the vicinity of the MRI bore entrance...