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Disc degeneration is associated with a change in the FAST profile. Degeneration was induced in rabbit lumbar disc by annulus puncture and examined using the standard FAST protocol. (A–D) Normal discs 3 to 12 months postpuncture (mpp). (E–H) Degenerated discs at the same times. (I–L) Nucleus pulposus region of the degenerated discs under a higher magnification.
