title: Sonographic examination of the fetal vermis: tricks for obtaining the narrow midline target with 3-dimensional volume contrast imaging in the C plane.
abstract: Prenatal imaging of the fetal cerebellar vermis is challenging even for experienced examiners. We found that by aiming the ultrasound beam through the mastoid fontanel and then rotating the data set in a multiplanar reconstruction and applying volume contrast imaging in the C plane, we were consistently able to obtain images of the vermis in the standard midsagittal plane. Images of the fetal vermis suitable for morphologic evaluation were obtained in 408 of 414 cases (98.5%) at gestational ages of 18 weeks to 31 weeks 6 days; the examination time was only minimally increased.
authors.affiliation: Department of Obstetrics and Gynecology, Hadassah–Hebrew University Medical Center, Jerusalem, Israel. orishen@netvision.net.il
authors.forename: Ori
authors.initials: O
authors.lastname: Shen
authors.forename: Simcha
authors.initials: S
authors.lastname: Yagel
authors.forename: Dan V
authors.initials: DV
authors.lastname: Valsky
authors.forename: Roni
authors.initials: R
authors.lastname: Rabinowitz
authors.forename: Yaron
authors.initials: Y
authors.lastname: Zalel
mesh_terms: D002531:Cerebellum / Q000196:embryology* / Q000648:ultrastructure*; D003287:Contrast Media; D004453:Echoencephalography / Q000379:methods*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000379:methods*
chemical_list: D003287:Contrast Media