Shawn Wagner1,
2, Jose Agraz3, Alexander Grunfeld4, Debiao Li1,
2
1Biomedical
Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States; 2Biomedical
Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA,
United States; 3Bioengineering, UCLA, Los Angeles, CA, United
States; 4Life Sciences, UCLA, Los Angeles, CA, United States
Hyperpolarization by RF irradiation spin transfer utilizing parahydrogen requires low magnetic fields. These fields have been created with solenoids using current to determine the field strength. This abstract is intended to show how noise in the current results in magnet field noise, leading to sporadic loss of polarization in echo sequences. The loss in temporal refocusing is a crucial issue in the reliability of RF irradiation spin transfer PHIP hyperpolarization, since the last part of such sequences contains an echo period in the transverse plane.