PMC5780217_01
Lumbar magnet resonance imaging. Magnet resonance imaging of the lumbar spine three days after the injury, showing an intraforaminal hourglass-shaped constriction of the right fifth lumbar nerve root in axial T2-weighted turbo-spin-echo sequences (A) and the axial T1-weighted sequences (B). The hourglass-shaped constriction can hardly be identified in the proton-density-weighted coronary sequence (C). There is no nerve transection or rupture. The sagittal stir sequence of the lumbar spine shows only mild degenerative changes of the lumbar discs without relevant protrusions (D).
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F1
The radiologist identified an hourglass-shaped constriction of the fifth lumbar nerve root as shown in Fig. 1.