APPLICATION TO RAT LUNG OF THE EXTENDED RORSCHACH-HAZLEWOOD MODEL OF SPIN-LATTICE RELAXATION

The spin-lattice relaxation time T-1 was measured in excised degassed (airless) rat lungs over the frequency range 6.7 to 80.5 MHz, The obse rved frequency dependence was fitted successfully to the water-biopoly mer cross-relaxation theory proposed by H. E. Rorschach and C. F. Hazl ewood (RH) [J. Magn. Reson. 70, 79 (1986)1, The rotating frame spin-la ttice relaxation time T-1 rho was also measured in rat lung fragments over the frequency range 0.56 to 5.6 kHz, and the observed frequency d ependence was explained with an extension of the RH model, The agreeme nt between the theory and the experimental data in both cases is good. (C) 1996 Academic Press, Inc.