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Fig 1. Motor vehicle crash involving 31-year-old man. Images demonstrate signal intensity–to-noise measurement technique used in assessing the abnormal signal intensity in the acute T12 compression fracture (arrows).
A, T1-weighted image.
B, T2-weighted image.
C, In-phase image.
D, Opposed-phase image. Region of interest cursor is on the region of abnormal signal intensity on the T1- and T2-weighted images. SIR is 0.76, indicating the presence of fat or benign marrow. Note the suppression of signal intensity from the normal fatty marrow in the adjacent vertebra.
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