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fetal neurosonography

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https://www.readbyqxmd.com/read/29891067/fetal-cerebellar-disorders
#1
Tally Lerman-Sagie, Daniella Prayer, Sophia Stöcklein, Gustavo Malinger
The embryologic development of the cerebellum extends over a long time period, thus making it vulnerable to a broad spectrum of malformations and disruptions. Knowledge of the main steps of fetal posterior fossa development; the normal imaging patterns at different stages of embryogenesis; the large spectrum of cerebellar malformations; and their clinical presentations enables diagnosis and precise counseling of parents. Sonography is the most important imaging method for the screening of cerebellar malformations since it is noninvasive, widely available, and safe for both mother and child...
2018: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29858521/the-third-ventricle-of-the-human-fetal-brain-normative-data-and-pathologic-correlation-a-3d-transvaginal-neurosonography-study
#2
Roee Birnbaum, Stefano Parodi, Gloria Donarini, Gabriella Meccariello, Ezio Fulcheri, Dario Paladini
OBJECTIVE: The objective of the study are to describe (a) the technical aspects and (b) the anatomical boundaries of the fetal third ventricle (3V) on the midsagittal sonographic view and to assess (c) different biometric parameters in normal and abnormal fetuses and (d) and their reproducibility. METHODS: This study included 67 normal and 50 CNS anomalies fetuses which include (1) obstructive severe ventriculomegaly (SVM; atrial width ≥ 15 mm), (2) moderate ventriculomegaly (10-14...
June 1, 2018: Prenatal Diagnosis
https://www.readbyqxmd.com/read/29715691/vp-nets-efficient-automatic-localization-of-key-brain-structures-in-3d-fetal-neurosonography
#3
Ruobing Huang, Weidi Xie, J Alison Noble
Three-dimensional (3D) fetal neurosonography is used clinically to detect cerebral abnormalities and to assess growth in the developing brain. However, manual identification of key brain structures in 3D ultrasound images requires expertise to perform and even then is tedious. Inspired by how sonographers view and interact with volumes during real-time clinical scanning, we propose an efficient automatic method to simultaneously localize multiple brain structures in 3D fetal neurosonography. The proposed View-based Projection Networks (VP-Nets), uses three view-based Convolutional Neural Networks (CNNs), to simplify 3D localizations by directly predicting 2D projections of the key structures onto three anatomical views...
July 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29541649/learning-to-segment-key-clinical-anatomical-structures-in-fetal-neurosonography-informed-by-a-region-based-descriptor
#4
Ruobing Huang, Ana Namburete, Alison Noble
We present a general framework for automatic segmentation of fetal brain structures in ultrasound images inspired by recent advances in machine learning. The approach is based on a region descriptor that characterizes the shape and local intensity context of different neurological structures without explicit models. To validate our framework, we present experiments to segment two fetal brain structures of clinical importance that have quite different ultrasonic appearances-the corpus callosum (CC) and the choroid plexus (CP)...
January 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29499436/fully-automated-alignment-of-3d-fetal-brain-ultrasound-to-a-canonical-reference-space-using-multi-task-learning
#5
Ana I L Namburete, Weidi Xie, Mohammad Yaqub, Andrew Zisserman, J Alison Noble
Methods for aligning 3D fetal neurosonography images must be robust to (i) intensity variations, (ii) anatomical and age-specific differences within the fetal population, and (iii) the variations in fetal position. To this end, we propose a multi-task fully convolutional neural network (FCN) architecture to address the problem of 3D fetal brain localization, structural segmentation, and alignment to a referential coordinate system. Instead of treating these tasks as independent problems, we optimize the network by simultaneously learning features shared within the input data pertaining to the correlated tasks, and later branching out into task-specific output streams...
May 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29353032/clinical-assessment-and-brain-findings-in-a-cohort-of-mothers-fetuses-and-infants-infected-with-zika-virus
#6
Magdalena Sanz Cortes, Ana Maria Rivera, Mayel Yepez, Carolina V Guimaraes, Israel Diaz Yunes, Alexander Zarutskie, Ivan Davila, Anil Shetty, Arun Mahadev, Saray Maria Serrano, Nicolas Castillo, Wesley Lee, Gregory Valentine, Michael Belfort, Guido Parra, Carrie Mohila, Kjersti Aagaard, Miguel Parra Saavedra
BACKGROUND: Congenital Zika virus (ZIKV) infection can be detected in both the presence and absence of microcephaly and manifests as a number of signs and symptoms that are detected clinically and by neuroimaging. However, to date, qualitative and quantitative measures for the purpose of diagnosis and prognosis are limited. OBJECTIVES: Main objectives of this study conducted on fetuses and infants with confirmed congenital Zika virus infection and detected brain abnormalities were (1) to assess the prevalence of microcephaly and the frequency of the anomalies that include a detailed description based on ultrasound and magnetic resonance imaging in fetuses and ultrasound, magnetic resonance imaging, and computed tomography imaging postnatally, (2) to provide quantitative measures of fetal and infant brain findings by magnetic resonance imaging with the use of volumetric analyses and diffusion-weighted imaging, and (3) to obtain additional information from placental and fetal histopathologic assessments and postnatal clinical evaluations...
April 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29119569/the-use-of-fetal-neurosonography-and-brain-mri-in-cases-of-cytomegalovirus-infection-during-pregnancy-a-retrospective-analysis-with-outcome-correlation
#7
Roee Birnbaum, Liat Ben-Sira, Tally Lerman-Sagie, Gustavo Malinger
OBJECTIVE: To analyze ultrasound (US) and magnetic resonance imaging (MRI) results and developmental outcome in cases of maternal primary cytomegalovirus (CMV) infection during pregnancy. METHODS: We retrospectively reviewed the results of fetal neurosonography and brain MRI of CMV-infected fetuses (Group 1). Cases of maternal infection in which the fetal status was unknown, and subsequently had a negative CMV postnatal urine analysis, were independently analyzed (Group 2)...
December 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28742597/contemporary-modalities-to-image-the-fetal-brain
#8
Ivan Davila, Isabel Moscardo, Mayel Yepez, Magdalena Sanz Cortes
Fetal brain ultrasound remains as the mainstay for screening fetal intracranial anatomy. One of its main advantages is the availability of 3 dimensional and other ultrasound modalities for a better understanding of fetal neurodevelopment. Neurosonography is performed when findings, suggestive of an abnormality, are present on a screening ultrasound or if a high-risk situation of brain injury is present. This technique offers the use of complementary imaging planes, axial, coronal and sagittal, and the ability to image intracranial anatomy from the transabdominal and transvaginal approaches...
September 2017: Clinical Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28686357/homozygous-null-variant-in-cradd-encoding-an-adaptor-protein-that-mediates-apoptosis-is-associated-with-lissencephaly
#9
Tamar Harel, Nuphar Hacohen, Avraham Shaag, Moshe Gomori, Amihood Singer, Orly Elpeleg, Vardiella Meiner
Lissencephaly is a severe malformation of cortical development, most often attributed to abnormalities in neuronal migration. It is associated with a severe prognosis including developmental delay, intellectual disability, and seizures. Lissencephaly can be reliably diagnosed during late gestation by neurosonography or fetal magnetic resonance imaging (MRI). We report two sibling male fetuses who were diagnosed with delayed cortical sulcation highly suggestive of lissencephaly during late pregnancy. After receiving genetic counseling, the parents elected to terminate the pregnancies based on the neuroradiological findings and the associated severe prognosis...
September 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28624828/unique-imaging-features-enabling-the-prenatal-diagnosis-of-developmental-venous-anomalies-a-persistent-echogenic-brain-lesion-drained-by-a-collecting-vein-in-contrast-with-normal-brain-parenchyma-on-mri
#10
Karina Krajden Haratz, Alon Peled, Boris Weizman, Liat Gindes, Mordechai Tamarkin, Dorit Lev, Dvora Kidron, Liat Ben-Sira, Gustavo Malinger, Tally Lerman-Sagie, Zvi Leibovitz
OBJECTIVE: To describe the prenatal imaging features enabling diagnosis of developmental venous anomalies (DVA). METHODS: Four fetuses with unexplained persistent echogenic parenchymal brain lesions were studied. The evaluation included dedicated neurosonography, fetal MRI, serology for intrauterine infection, screening for coagulation abnormalities, and chromosomal microarray. Postnatal neurodevelopmental follow-up or autopsy results were assessed. RESULTS: DVA presented as very slowly growing echogenic brain lesions without cystic components, calcifications, or structural changes on otherwise normal neurosonographic scans performed at 2- to 3-week intervals...
2018: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28585870/accuracy-of-diagnosis-and-counseling-of-fetal-brain-anomalies-prior-to-24-weeks-of-gestational-age
#11
Rozemarijn Snoek, Marieke E W A Albers, Eduard J H Mulder, Klaske D Lichtenbelt, Linda S de Vries, Peter G J Nikkels, Inge Cuppen, Lourens R Pistorius, Gwendolyn T R Manten, Roel de Heus
OBJECTIVE: To evaluate the accuracy of prenatal neurosonography in diagnosing underlying causes of fetal ventriculomegaly, posterior fossa anomalies and microcephaly before 24 weeks' gestational age (GA) and to study the accuracy of prenatal counseling on postnatal prognosis. METHODS: A retrospective cohort study based on 146 cases of these fetal brain anomalies before 24 weeks' GA. Counseling on prognosis was compared with postnatal outcome. Data on genetic testing was analyzed...
August 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28568972/fetal-cerebral-magnetic-resonance-imaging-neurosonography-and-the-brave-new-world-of-fetal-medicine
#12
COMMENT
G Malinger, D Paladini, G Pilu, I E Timor-Tritsch
No abstract text is available yet for this article.
December 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28509324/three-dimensional-neurosonography-a-novel-field-in-fetal-medicine
#13
Michał Lipa, Ritsuko Kimata Pooh, Mirosław Wielgoś
Neurosonography is a promising technique for prenatal diagnosis, combining features of ultrasound imaging with fetal neurology. The brain is a three-dimensional structure, therefore observing brain structure in the three basic planes (sagittal, coronal and axial) is mandatory. The anterior fontanelle and sagittal suture may serve as acoustic ultrasound windows in the transvaginal brain scan, allowing to obtain high-resolution neuroimages of the intracranial structures. Furthermore, three-dimensional (3D) ultrasound combined with the transvaginal brain approach provides detailed and sophisticated neuroimages...
2017: Ginekologia Polska
https://www.readbyqxmd.com/read/28288452/fetal-magnetic-resonance-imaging-findings-in-prenatal-zika-virus-infection
#14
José Enrique Sanín-Blair, Carolina Gutiérrez-Márquez, Diego A Herrera, Arastoo Vossough
Brain lesions and malformations have been described on ultrasonography of prenatal Zika infection; however, there are scarce reports about fetal magnetic resonance (MR) findings. We report 3 cases of fetuses with confirmed intrauterine Zika virus infection evaluated by ultrasound and fetal MR. Various morphometric measurements were assessed and brain maturation was calculated with the fetal total maturation score. Fetuses with prenatal Zika virus infection showed retardation in brain maturation indexes evaluated by fetal MR...
2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/27978593/fetal-neurosonogaphy-ultrasound-and-magnetic-resonance-imaging-in-competition
#15
COMMENT
S Tercanli, F Prüfer
Both in routine diagnostics and detailed, highly specialized workups, major advances have been observed in many areas of ultrasound due to an increase in expertise and improved technology in recent years. This is particularly true in the case of fetal neurosonography 1 2 3 4. Malformations of the CNS together with fetal heart defects are among the most common congenital anomalies. From the embryonic phase to the late third trimester, the CNS undergoes extensive development and maturation processes. The diagnosis of CNS anomalies is therefore primarily dependent on the time at which the examination is performed and the experience of the examiner...
December 2016: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/27696469/three-dimensional-ultrasonography-for-advanced-neurosonography-neurosofe-3d-analysis-of-acquisition-related-factors-influencing-the-quality-of-the-brain-volumes
#16
MULTICENTER STUDY
Nerea Maiz, Ignacio Alonso, María Belar, Jorge Burgos, Ana Irasarri, Francisca S Molina, Catalina de Paco, José I Pijoan, Walter Plasencia, Carlota Rodó, M Angeles Rodríguez, Mauricio Tajada, Albert Tubau
OBJECTIVE: To evaluate the acquisition-related factors influencing the quality of the brain volumes for further study of advanced neurosonography. METHODS: This was a prospective multicentre study. Five centres were asked to include five cases each, acquiring two volumes per case, at different gestational ages. Ten operators performed an advanced neurosonography per case. The potential influence of the following factors on the number of evaluable structures was assessed: vaginal/ abdominal acquisition, position of the head, gestational age, subjective quality of the volume and the acquiring operator itself...
November 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27670206/malformations-of-cortical-development-from-postnatal-to-fetal-imaging
#17
REVIEW
Tally Lerman-Sagie, Zvi Leibovitz
Abnormal fetal corticogenesis results in malformations of cortical development (MCD). Abnormal cell proliferation leads to microcephaly or megalencephaly, incomplete neuronal migration results in heterotopia and lissencephaly, neuronal overmigration manifests as cobblestone malformations, and anomalous postmigrational cortical organization is responsible for polymicrogyria and focal cortical dysplasias. MCD comprises various congenital brain disorders, caused by different genetic, infectious, or vascular etiologies and is associated with significant neurological morbidity...
September 2016: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/26732542/sonographic-detection-of-central-nervous-system-defects-in-the-first-trimester-of-pregnancy
#18
REVIEW
A C Engels, L Joyeux, C Brantner, B De Keersmaecker, L De Catte, D Baud, J Deprest, T Van Mieghem
The fetal central nervous system can already be examined in the first trimester of pregnancy. Acrania, alobar holoprosencephaly, cephaloceles, and spina bifida can confidently be diagnosed at that stage and should actively be looked for in every fetus undergoing first-trimester ultrasound. For some other conditions, such as vermian anomalies and agenesis of the corpus callosum, markers have been identified, but the diagnosis can only be confirmed in the second trimester of gestation. For these conditions, data on sensitivity and more importantly specificity and false positives are lacking, and one should therefore be aware not to falsely reassure or scare expecting parents based on first-trimester findings...
March 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/26592136/added-value-of-fetal-mri-in-fetuses-with-suspected-brain-abnormalities-on-neurosonography-a-systematic-review-and-meta-analysis
#19
REVIEW
Martine van Doorn, Katrien Oude Rengerink, Esther A Newsum, Liesbeth Reneman, Charles B Majoie, Eva Pajkrt
PURPOSE: To evaluate the additional diagnostic value of fetal Magnetic Resonance Imaging (MRI) in fetuses with suspected brain abnormalities identified with advanced neurosonography (NS). METHODS: A systematic literature search was performed for studies reporting on a comparison between diagnosis with NS and MRI, in fetuses suspected for brain abnormalities. Abnormalities detected on NS were compared with those detected on MRI as well as with postnatal imaging findings to assess the added value of fetal MRI...
September 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/26529353/detection-of-fetal-corpus-callosum-abnormalities-by-means-of-3d-ultrasound
#20
S Pashaj, E Merz
PURPOSE: The objective of this study was to prenatally detect corpus callosum pathologies such as agenesis, partial agenesis, hypo- and hyperplasia and enhanced echogenicity. MATERIALS AND METHODS: Between 2009 and 2013 detailed 3D ultrasound examinations of the fetal corpus callosum were carried out as part of a level III examination for fetal anomalies. All scans were performed using Voluson E8 equipment (GE, Zipf, Austria) with a 5 - 8 MHz 3D transabdominal and 5 - 9 MHz 3D transvaginal transducer...
April 2016: Ultraschall in der Medizin
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