Normal fetal liver. (a) Axial US image of the upper abdomen in a fetus at 25 wee…

Normal fetal liver. (a) Axial US
image of the upper abdomen in a fetus
at 25 weeks gestation shows a normal
liver (calipers). Note the diffusely homogeneous
echogenicity throughout the
parenchyma. A normal fetal stomach ()
and spleen (arrow) also are seen. (b) Sagittal
US image through the right lobe of
the liver (black arrows), with the superior
aspect on the right and the inferior aspect
on the left, best shows the length of the liver. The
measurement is made from the diaphragm to the inferior
liver edge. The inferior vena cava (white arrow)
extending to the right atrium confirms the longitudinal
right parasagittal plane. The liver length can also
be measured on the coronal view. Normative data for
liver length at various gestational ages are reported
in an article by Vintzileos et al (2). (c) Sagittal T1-
weighted MR image, with the head at the superior aspect,
shows high signal intensity in a normal fetal liver
(arrows), compared with the signal intensity of the
other fetal soft tissue, owing to higher levels of protein,
copper, and zinc in the liver. (d) Coronal oblique
T2-weighted MR image shows low signal intensity in
the normal fetal liver (arrow), as compared with the
signal intensity in the other fetal soft tissue, due to the
higher iron content in the li

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