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Fig. 5 Axial T1-weighted
MRI showing anterior and
posterior terms [
5
]
An intervertebral disc is composed of two parts: an outer strong ring called
Annulus Fibrosus and a soft gel-like inner called Nucleus Pulposus. The nucleus
pulposus consists of 80
85 % water in normal cases. By aging the disc dehydrates
limiting its ability to absorb shocks. The outer rings gets weaker as well and start
having tears that causes various abnormalities. The bottom up view is the anterior
while top down is the posterior direction. Figures
6
and
7
show T1- and T2-
weighted MRI for the same lumbar disc from our dataset, respectively.
-
Fig. 6 Sagittal T1 MRI for
L1-L2 disc [
5
]
