trimester pregnancy—Gestational sac—Intrauterine Purpose: To determine if and when fetal structures are pregnancy identifiable during first trimester pregnancy on magnetic resonance imaging (MRI) in women with acute abdomi- nopelvic pain. First trimester pregnancy is encountered on magnetic Methods: Sixty-four first trimester MRI examinations resonance imaging (MRI) when evaluating the pregnant performed for evaluation of abdominopelvic pain were patient who presents with abdominopelvic pain, typically reviewed retrospectively. T2-weighted images were as- to exclude acute appendicitis which affects an estimated 1 sessed independently by three radiologists for the pres- in 766 pregnancies . These studies are not tailored to ence of gestational sac, yolk sac, fetal pole, and limb examine the developing embryo or fetus, but they do buds. Mean sac diameter and sac volume were deter- provide detailed views of the gravid uterus. And, while mined, and logistic regression analyses were performed. transvaginal sonography is the primary modality for Criterion values for fetal structures and gestational sac assessment of pregnancy in all trimesters, lack of size were calculated using receiver operating character- knowledge regarding the expected appearance of early istic analysis. intrauterine pregnancy on MRI may lead to misdiagnosis Results: A gestational sac is present in all but two cases.
Abdominal Radiology – Springer Journals
Published: Mar 29, 2017
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