^(129)Xe Magnetic Resonance Imaging Experiments Using Laser Polarization in a High Magnetic Field

摘要

^(129)Xe magnetic resonance imaging in a magnetic Geld of 4,7 T and at 311K with laser polarization in the same Geld is reported.In order to overcome the self-diffusion effect that destroys the transverse magnetization very rapidly,gradient echo is used instead of spin echo.Spectroscopic image is also obtained.Two-dimensional spin nutation spectroscopy under steady state was used to calibrate π/2 pulse of ^(129)Xe in gaseous state.In addition,we have measured the relaxation time of laser-polarized gaseous ^(129)Xe using the saturation-recovery method.