First Trimester MR (10 weeks)
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This is an MRI of the pelvis in a patient
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with a slightly more advanced first trimester
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pregnancy, closer to 10 weeks' gestational age.
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These are the axial T2-weighted images, again
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at the level of the sacrum and iliac bones.
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As we scroll inferiorly, we see
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the mildly enlarged gravid uterus.
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Again, this is T2 heterogeneous myometrium
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and the T2 bright gestational sac.
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We can see the fetus
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within the amniotic sac.
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We also begin to see very
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early placenta here laterally.
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On the sagittal T2-weighted image of the pelvis,
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we get a really nice look at the early fetus.
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This is the cranial portion of the fetus.
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This is the caudal portion of the fetus.
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And we can, in some images, see
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a very early umbilical cord.
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It's important to document
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again on the sagittal images.
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That the cervix is closed with only
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minimal fluid in the cervical canal.
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So this patient's internal os is closed.
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This is the anterior and
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posterior lip of the cervix.
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This is a coronal T2
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weighted image of the pelvis.
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And again, we see the gravid uterus, early
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placenta, myometrium, and gestational
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sac filled with amniotic fluid.
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We have more of a coronal
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view of the fetus here.
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And again, this is the cranial portion.
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These are the early limbs,
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early thorax and abdomen.
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and the caudal portion of the embryo here.
Erin Gomez, MD
Assistant Professor of Radiology
Johns Hopkins Hospital
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