The T1 and T2 relaxation times were calculated in the bone marrow, subcutaneous fat and muscles in the extremities of 21 volunteers. There were no significant differences in relation to age or sex. In the same individual, the difference in the relaxation time was negligible between different sites in muscle, fat and bone. These and other normal values reported are dependent on examination technique and calculation method which must be compensated for when comparisons between materials from different centers are performed.
BottomleyP. A.FosterT. H.ArgersingerR. R.PfeiferL. M.: A review of normal tissue hydrogen NMR relaxation times and relaxation mechanisms from 1–100 MHz. Dependence on tissue type, NMR frequency, temperature, species, excision and age. Med. Phys.11 (1984), 425.
2.
PetterssonH.FitzsimmonsJ.KropD.HamlinD. J.: Magnetic resonance imaging of the extremities. II. T1 and T2 relaxation times of muscle and fat. Normal values, their reproducibility and dependence on physiologic variations. Acta Radiol. Diagnosis26 (1985), 413.
3.
SloneR. M.ScottK. N.SattinW.PetterssonH.: Evaluation of a simplified technique for calculating T1 relaxation times using standard spin-echo MR imaging sequences. Comparison with inversion recovery imaging and spectroscopy. Submitted for publication 1986.
