Biomedical Engineering Reference
In-Depth Information
Brain: difference in volume with time
90000
80000
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50000
40000
30000
20000
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0
-10000
-10
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70
Time in weeks from LMP
subject 1
subject 2
subject 3
subject 4
Ventricles: difference in volume with time
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0
-1000
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-10
0
10
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7
Time in weeks from LMP
subject 1
subject 3
subject 4
subject 2
FIGURE 7.17
Pregnancy: T1-weighted baseline images taken prior to pregnancy (a). Subtraction im-
ages from prior to delivery minus baseline (b), six weeks after delivery minus prior to
delivery (c), and six months after delivery minus baseline (d). The brain decreases in
size before delivery and increases after delivery back to its normal size. Figure (e) shows
change in brain volume, and Figure (f) shows change in ventricular volume with time.
