(Figure 11) Longitudinal spin relaxation time (T 1) is very sensitive with an increase of magnetic field and hence enhance the NMR signals is noticeable in SEOP in case of Xe. As T 1 is higher for blue marking conditioning NMR experiment shows more enhanced peak compare to other. For hyperpolarized Xe in tedlar bags, the T 1 is 38±12 minutes when data collected in presence of 1.5 mT magnetic field. However, satisfactory increment in T 1 delay time (354±24 minutes) when data was collected in presence of 3000 mT magnetic field.