Interpretation of magnetic resonance images making use of in vitro examinations of spinal tissue.
T1 and T2 relaxation times were determined in vitro at 21 MHz (0.5 T) for a variety of spinal and paraspinal tissues. Intensity formulas for spin echo and inversion recovery sequences were derived and used to calculate the intensities of these tissues as they would appear in magnetic resonance images. The intensity was calculated as a function of various repetition, echo, and inversion times. It is shown that the combination of acquiring in vitro relaxation time values and calculating intensity as a function of pulse timings is useful to predict the parameter setting for optimal contrast between certain tissues without applying series of magnetic resonance images.
D004578:Electron Spin Resonance Spectroscopy; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D009126:Muscle Relaxation; D013131:Spine / Q000032:analysis / Q000502:physiology*