MR Volumetry of Brain and CSF in Fetuses Referred for Ventriculomegaly
João Fernando Kazan-Tannus1,
Vandana Dialani1,
Milliam L. Kataoka1,
Gloria Chiang2,
Henry A. Feldman3,
Jeffrey S. Brown4 and
Deborah Levine1
1 Department of Radiology, Beth Israel Deaconess Medical Center, 330 Brookline
Ave., Boston, MA 02215.
2 Department of Radiology, Harvard Medical School, Boston, MA.
3 Clinical Research Program, Children's Hospital Boston, Boston, MA 02115.
4 Department of Ambulatory Care & Prevention, Harvard Medical School and
Harvard Pilgrim Health Care, Boston, MA.
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Fig. 1A —Coronal views of fetus at 31 weeks. MR images show tracings
of supratentorial cortex (A), ventricles (B), and cerebellum
(C). Supratentorial parenchymal volume was determined by subtracting
values for ventricles from that of cortex.
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Fig. 1B —Coronal views of fetus at 31 weeks. MR images show tracings
of supratentorial cortex (A), ventricles (B), and cerebellum
(C). Supratentorial parenchymal volume was determined by subtracting
values for ventricles from that of cortex.
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Fig. 1C —Coronal views of fetus at 31 weeks. MR images show tracings
of supratentorial cortex (A), ventricles (B), and cerebellum
(C). Supratentorial parenchymal volume was determined by subtracting
values for ventricles from that of cortex.
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Fig. 3 —Volume of supratentorial parenchyma is directly related to
fetal gestational age as determined by sonography. Similar pattern was
observed with gestational age determined by dates, biparietal diameter, and
head circumference (see Table
2). Six hundred data points represent 50 patients measured four
times (twice by one reviewer and once by two additional reviewers) in three
planes of observation.
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Fig. 4 —Volume of ventricles is directly related to fetal gestational
age as determined by sonography but increases less rapidly than parenchymal
volume (shown in Fig. 3).
Similar pattern was observed with gestational age determined by dates,
biparietal diameter, and head circumference (see
Table 2). Six hundred data
points represent 50 patients measured four times (twice by one reviewer and
once by two additional reviewers) in three planes of observation.
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Fig. 5A —Volume of cerebellum. Volume of cerebellum (including vermis)
is directly related to fetal gestational age as determined by sonography
(A) and brain size as represented by biparietal diameter (B).
Rate of increase was comparable to that of parenchyma (shown in
Fig. 3). Similar patterns were
observed with gestational age determined by dates or by brain size represented
by head circumference (see Table
2). Six hundred data points represent 50 patients measured four
times (twice by one reviewer and once by two additional reviewers) in three
planes of observation.
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Fig. 5B —Volume of cerebellum. Volume of cerebellum (including vermis)
is directly related to fetal gestational age as determined by sonography
(A) and brain size as represented by biparietal diameter (B).
Rate of increase was comparable to that of parenchyma (shown in
Fig. 3). Similar patterns were
observed with gestational age determined by dates or by brain size represented
by head circumference (see Table
2). Six hundred data points represent 50 patients measured four
times (twice by one reviewer and once by two additional reviewers) in three
planes of observation.
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Copyright © 2007 by the American Roentgen Ray Society.
