Normal Fetal Posterior Fossa in MR Imaging: New Biometric Data and Possible Clinical Significance

Ber, Roee; Bar‐Yosef, Omer; Hoffmann, Chen; Shashar, David; Achiron, Reuven; Katorza, E.

doi:10.3174/ajnr.a4258

Cited by 28 publications

(23 citation statements)

References 32 publications

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“…23,24 Our study showed high intraobserver reproducibility (range, 0.79 -0.99) and high agreement between 2 radiologists (range, 0.71-1) for all biometric measurements in the 3 imaging modalities. Similar results were reported by Tilea et al 18 and by Ber et al 25 for MR imaging measurements of the posterior fossa.…”

supporting

confidence: 81%

Development of the Fetal Vermis: New Biometry Reference Data and Comparison of 3 Diagnostic Modalities-3D Ultrasound, 2D Ultrasound, and MR Imaging

Katorza

Bertucci²,

Perlman

et al. 2016

American Journal of Neuroradiology

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supporting

confidence: 81%

Development of the Fetal Vermis: New Biometry Reference Data and Comparison of 3 Diagnostic Modalities-3D Ultrasound, 2D Ultrasound, and MR Imaging

Katorza

Bertucci²,

Perlman

et al. 2016

American Journal of Neuroradiology

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“…Hypoplasia was supported by semi-automatic measurement of the vermian cross-sectional area with reference to biometric data published by Ber et al [16]. According to this publication which suffers from low data density between 25 and 27 weeks‘gestation, vermian cross-sectional area in our first case was normal at the time of follow-up [16]. What is the clinical impact of confirming or excluding mild vermian hypoplasia and how confident can we be?…”

Section: Discussionmentioning

confidence: 65%

Delayed fenestration of Blake’s pouch with or without vermian hypoplasia: fetal MRI at 3 tesla versus 1.5 tesla

Kau¹,

Birnbacher²,

Schwärzler³

et al. 2019

cerebellum ataxias

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Background Fetal magnetic resonance imaging (MRI), mainly performed at standard field strength, plays a role in the classification of posterior fossa malformations. In the context of early second-trimester screening, upward rotation of the cerebellar vermis per se is usually compatible with a more favorable outcome than Dandy-Walker malformation and profound vermian hypoplasia. Delayed fenestration of Blake’s pouch may either mimic vermian hypoplasia by compression or be associated with it in individual cases. To increase specificity, there is a growing interest in the use of high-field MRI which is believed to be safe as long as the specific absorption rate is kept within accepted limits. We aim to illustrate its added value during the second and third trimester. Case presentation In the first case, fetal MRI at 1.5 Tesla was performed at 21 and 27 weeks’ gestation with sonographic follow up postnataly. In the second case, 3 Tesla MR images were acquired at 21 and 34 weeks’ gestation as well as in the neonatal period. Conclusions This pictorial case vignette supports the suggestion that mid-gestational MRI at 3 Tesla has the potential to exclude pronounced vermian hypoplasia with higher confidence than at 1.5 Tesla. However, the discrimination of mild hypoplasia from slight deformation of the cerebellar vermis will likely remain challenging.

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“…The Pearson correlation was used to assess the correlation for all evaluated parameters. T-tests were calculated to compare the relative brainstem areal contribution of the midbrain, pons, and medulla oblongata between fetuses in the first five evaluated GW (weeks [14][15][16][17][18] This article is protected by copyright. All rights reserved.…”

Section: Discussionmentioning

confidence: 99%

Normal human brainstem development in vivo: a quantitative fetal MRI study

Dovjak

Schmidbauer

Brugger

et al. 2021

Ultrasound in Obstet & Gyne

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There is a significant change in the brainstem area proportions during the second and third trimester of pregnangy, with an increase of the pons and a decrease of the midbrain area realative to the total brainstem area. Reference data of planimetric and linear measurements of the brainstem and cerebellum are provided from week 15 to 40. What are the clinical implications of this work? The substructures of the fetal brainstem follow a distinct spatiotemporal growth pattern. Caution is needed when interpreting fetal brainstem appearance during the early second trimester, as brainstem proportions differ significantly from the adult morphology. With the provided reference data brainstem morphology can be quantified.

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Normal Fetal Posterior Fossa in MR Imaging: New Biometric Data and Possible Clinical Significance

Cited by 28 publications

References 32 publications

Development of the Fetal Vermis: New Biometry Reference Data and Comparison of 3 Diagnostic Modalities-3D Ultrasound, 2D Ultrasound, and MR Imaging

Development of the Fetal Vermis: New Biometry Reference Data and Comparison of 3 Diagnostic Modalities-3D Ultrasound, 2D Ultrasound, and MR Imaging

Delayed fenestration of Blake’s pouch with or without vermian hypoplasia: fetal MRI at 3 tesla versus 1.5 tesla

Normal human brainstem development in vivo: a quantitative fetal MRI study

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