Intracranial translucency assessment at first trimester nuchal translucency ultrasound

Abstract

We consider that acquisition of an image of the IT as part of the routine first trimester nuchal translucency scan is feasible, without lengthening appointment times.

Failure of getting intracranial translucency image in posterior fossa in the examination of singleton pregnancies at 11–13 weeks of gestation: reasons and outcomes

“…This rate was between 0% and 5% in other series. [4,[19][20][21] When we reviewed the literature, we found out that many studies on IT issue were rather archive studies which investigated recorded images retrospectively. [13,22,23] When these examinations were reevaluated, it was found that any fluid image seen in posterior fossa of some fetuses could be measured as IT by accident.…”

Evaluation of the fourth ventricle and nomogram of intracranial translucency at 11–13 weeks of gestation

“…[18] Another study from our country reported mean IT diameter 1.77±0.4 mm. [15] This study had lower sample size compared to our data and some CNS abnormalities were not excluded from the normal cases. Peixoto et al [16] assessed 199 fetuses at 11-13 +6 weeks of gestation in a Brazilian population.…”

“…The varying rates were reported in the literature between 87.2% and 100%. [6,7,[11][12][13][14][15] Fetal position, obesity, gestational age and whether sonographers were obstetricians or maternal-fetal medicine specialists with a particular interest in sonography or not were significantly associated with the success of IT visualization. [7,12,14,15] Different mean IT diameters have been reported by different clinics.…”

“…[6,7,[11][12][13][14][15] Fetal position, obesity, gestational age and whether sonographers were obstetricians or maternal-fetal medicine specialists with a particular interest in sonography or not were significantly associated with the success of IT visualization. [7,12,14,15] Different mean IT diameters have been reported by different clinics. [6,16,17] In a prospective multicenter trial from Germany, a total of 16,164 fetuses were examined, and 11 open spina bifida cases were identified at the first trimester screening and mean IT diameter was reported 2.1 mm.…”