Search Results
Results 451 - 500 of 982
< 5 6 7 8 9 10 11 12 13 14 15 >
van Lindert Erik J - - 2006
OBJECTIVE: To describe the different imaging modalities used for the diagnosis and classification of hydrocephalus, their role in defining the optimal treatment of hydrocephalus and to define the optimal preoperative diagnostics for endoscopic third ventriculocisternostomy (ETV). METHODS: An overview on available imaging modalities for hydrocephalus will be given and their ...
Bendersky Mariana - - 2006
Fetal brain Magnetic Resonance Imaging (MRI) is a new technique of growing interest, with a high potential to detect prenatal central nervous system abnormalities. This requires an accurate knowledge of the normal morphological sequence of brain development. In this paper we studied the cortical development of post-mortem normal fetal brains, ...
Guo Yuan - - 2006
OBJECTIVE: To assess the state of the art of fetal magnetic resonance imaging (MRI) in China. DATA SOURCES: Both Chinese and English language literatures were searched in the databases of PUBMED (1998-2005) and CNKI (1998-2005), 41 published articles about fetal MRI were selected. RESULTS: Fetal MRI can serve as an ...
Wang Guang-bin - - 2006
BACKGROUND: Evaluation of fetal central nervous system (CNS) agenesis by ultrasonography (US) is frequently limited, but magnetic resonance imaging (MRI) has its own advantages and is gaining popularity in displaying suspected fetal anomalies. The purpose of this study was to explore the value of MRI in detecting fetal CNS agenesis. ...
Picone O - - 2006
A peculiar subtype of holoprosencephaly, middle interhemispheric variant (MIH), which is characterized by a partial posterior interhemispheric fusion of the brain, has been described in children. We describe the features of a case of a possible new MIH at 26 weeks of gestation, diagnosed using prenatal sonography and magnetic resonance ...
Huisman Thierry A G M - - 2006
We describe the prenatal MR findings in a 29-week fetus with a cloacal variant (urogenital sinus and anterior placed anus) in combination with an enlarged clitoris and urethral duplication and correlate them with postnatal imaging. Fetal MR imaging permits the diagnosis and characterization of cloacal and urogenital sinus malformations in ...
Griffiths Paul D - - 2006
BACKGROUND: In-utero MR imaging (iuMR) has entered the clinical arena during the last decade. It is used mainly for imaging fetal brain abnormalities. OBJECTIVE: To report our experience of imaging the fetal spine and spinal cord in fetuses with known or suspected abnormalities diagnosed on US imaging. MATERIALS AND METHODS: ...
Castori Marco - - 2006
We describe a fetus with abnormal ultrasound (US) imaging at 20 weeks showing hydrocephalus and radial aplasia. Post-mortem examination followed pregnancy termination and confirmed the diagnosis of oculo-auriculo-vertebral spectrum (OAVS). To delineate the pattern of prenatal features in OAVS, we reviewed 20 published fetuses showing abnormal US and/or magnetic resonance ...
Salomon L J - - 2006
OBJECTIVE: The justification for magnetic resonance imaging (MRI) in isolated mild ventriculomegaly remains controversial. This study was undertaken to evaluate the contribution of third-trimester MRI in isolated 10- to 12-mm fetal ventriculomegaly. DESIGN: Observational prospective cohort study. SETTING: Universitary prenatal reference centre. POPULATION: From February 2000 to May 2005, we ...
Vlădăreanu R - - 2006
Ultrasonography is the primary screening modality for obstetrics imaging. When additional information is needed to care for pregnant patients, computed tomography and magnetic resonance imaging (MRI) can be used. Because MRI provides superior contrast resolution compared with CT, uses no ionizing radiation, and permits imaging in more than one plane, ...
Lee Gui-Se-Ra - - 2006
We present the prenatal 3-dimensional (3D) sonographic findings in a case of holoprosencephaly with ethmocephaly at 32 weeks' gestation. The sonographic diagnosis was based on the intracranial findings of a single ventricle and bulb-shaped appearance of the thalami and facial abnormalities, including hypotelorism with proboscis. Chromosome study of the fetus ...
Ozkur Ayhan - - 2006
Conjoined twinning is a rare abnormality and cephalopagus is a very rare form of conjoined twins. We report a case of cephalopagus conjoined twins with encephalocele and omphalocele which diagnosed by ultrasonography and ultrafast magnetic resonance (MR) imaging at 24 weeks of the gestation. Ultrafast MR imaging can provide image ...
Zimmerman Robert A - - 2006
MRI can demonstrate and differentiate the various insults and anomalies that can be responsible for cerebral palsy. Recent advances have resulted in techniques and sequences that allow prompt detection of cytotoxic edema and evaluation of brain perfusion. MRI precisely demonstrates the various patterns of injury, distinguishing insults owing to profound ...
Fink A M - - 2006
Enlarged parietal foramina are believed to be benign and familial and due to a variable degree of defective intramembranous ossification of the parietal bones. We report 2 patients with this condition in whom fetal and neonatal MR imaging studies illustrate the antenatal and perinatal evolution of this condition and the ...
Henderson Shawn - - 2006
Acquired anomalies of the craniovertebral junction although rare, may result in serious clinical sequella. The prevalence of craniovertebral anomalies remains unknown since they may remain clinically silent. Os odontoideum is one such anomaly. The etiology remains controversial over whether it is a post-traumatic or congenital condition but the clinical considerations ...
Garel Catherine - - 2006
MR is now routinely and widely used in fetal neuroimaging and has proven to be valuable in the detection of many cerebral lesions, either genetically determined or acquired in utero. However, its efficiency has certain limits in the detection of diffuse white-matter abnormalities, the evaluation of fibre development and the ...
Chaumoitre K - - 2006
OBJECTIVES: To evaluate the potential of a single-shot thick-slab RARE (rapid acquisition with relaxation enhancement) sequence in fetal thoracoabdominal magnetic resonance (MR) examinations compared with multislice T2-weighted sequence and postnatal imaging. METHODS: RARE sequence is rapid and provides very heavily T2-weighted images. Twenty-seven fetal thoracoabdominal MR imaging examinations were performed ...
Paladini D - - 2006
OBJECTIVES: To assess whether, by applying a predefined set of morphometric measurements to the posterior fossa and the cerebellar vermis, it is possible to detect and quantify the following parameters, which represent key features of abnormalities of the vermis and posterior fossa: 1) upward rotation of the vermis; 2) upward ...
Benacerraf B R - - 2006
We present a case of Fryns' syndrome diagnosed prenatally using three-dimensional (3D) ultrasonography and magnetic resonance imaging (MRI). A cleft of the soft palate was diagnosed using 3D thick-slice ultrasonography. Other sonographic findings included a right diaphragmatic hernia, enlarged echogenic kidneys and severe polyhydramnios. The detection of the cleft palate ...
Valsky Dan Vadim - - 2006
OBJECTIVE: An intrauterine device (IUD) is a highly effective and prevalent form of birth control with a low failure rate. It is not without complications, including irregular bleeding and pelvic pain, perforation, expulsion, and pregnancy. Investigation of the symptomatic patient and routine follow-up of asymptomatic women with IUDs include transvaginal ...
Simonazzi G - - 2006
OBJECTIVE: To assess the feasibility of the prenatal diagnosis using fetal neurosonography of brain injuries in the surviving fetus after the demise of a monochorionic cotwin. METHODS: This was a retrospective observational study in the period 1990-2004 of monochorionic twin pregnancies with a single fetal demise. A detailed sonographic evaluation ...
McHugh Kieran - - 2006
The incidence of conjoined twins is estimated to be around 1 in 250,000 live births. There is a distinct female predominance. In this paper the imaging of conjoined twins both antenatally and postnatally is reviewed, in particular taking into consideration recent advances with multidetector CT. Accurate counselling of parents regarding ...
Girard Nadine - - 2006
PURPOSE OF REVIEW: Magnetic resonance imaging is playing an increasingly prominent role in depicting brain maturation, especially gyral formation that follows a temporospatial pattern, and in detecting developmental abnormalities of the cortex and other brain sectors. Knowledge of the technical advantages and limitations of in-utero magnetic resonance imaging techniques, relative ...
Limperopoulos Catherine - - 2006
OBJECTIVE: Advances in fetal magnetic resonance imaging allow the detection of subtle anatomic anomalies of unclear long-term clinical significance. The purpose of this study was to examine the accuracy of fetal magnetic resonance imaging in the diagnosis of isolated inferior vermian hypoplasia and to describe the neurodevelopmental outcome. STUDY DESIGN: ...
Matta Hilal - - 2007
Pygopagus conjoined twins were born by caesarean section at 34 weeks of gestation. Initial evaluation revealed no other abnormalities apart from their attachment at lower back, buttocks and perineum. They had two separate anal and urogenital openings. Their investigations included roentgenograms, ultrasound, barium enema, cystourethrogram, CT scan and MRI. There ...
Lockhat F - - 2006
AIM: To determine the value of magnetic resonance imaging (MRI) in the detection of the location of the placenta and placental adherence in patients with extra-uterine or abdominal pregnancy. METHODS: A retrospective study of patients with a suspected diagnosis of extra-uterine pregnancy was performed over a 12-month period. MRI images ...
Ghai Sandeep - - 2006
The cerebral cortex develops in three overlapping stages: cell proliferation, neuronal migration, and cortical organization. Abnormal neuronal migration may result in lissencephaly, which is characterized by either the absence (agyria) or the paucity (pachygyria) of cerebral convolutions. The two main clinicopathologic types of lissencephaly may be differentiated according to their ...
Simpson William L WL - - 2006
Hysterosalpingography (HSG) has become a commonly performed examination due to recent advances and improvements in, as well as the increasing popularity of, reproductive medicine. HSG plays an important role in the evaluation of abnormalities related to the uterus and fallopian tubes. Uterine abnormalities that can be detected at HSG include ...
Chen Sara C - - 2006
PURPOSE: To retrospectively determine the relationship between posterior fossa volume (PFV) and estimated gestational age (EGA) and/or femur length (FL) during pregnancy for the purpose of developing a normal growth curve. MATERIALS AND METHODS: Advance institutional review board approval was obtained for this HIPAA-compliant study, and the need for parent ...
Widjaja E - - 2006
BACKGROUND AND PURPOSE: There is an increasing interest in use of postmortem MR imaging as an adjunct or alternative to autopsy. Before evaluating spinal pathology on postmortem MR imaging, it is important to have knowledge of the normal appearance of the fetal spine at different gestational ages. The aim of ...
Kim Sun-Kwon - - 2006
Congenital epulis is a benign intraoral tumor that has rarely been diagnosed prenatally. We report a fetus with congenital epulis diagnosed by three-dimensional (3-D) ultrasound and fetal magnetic resonance imaging (MRI) at 35 weeks' gestation. We show an image of congenital epulis using a new ultrasound technique, the 3-D multislice ...
Mochel F - - 2006
Zellweger syndrome (ZS), or cerebrohepatorenal syndrome, was the first described peroxisomal biogenesis disorder. It represents the most severe phenotype, and some of its multiple congenital anomalies can manifest prenatally. Fetal hypokinesia, renal hyperechogenicity, and cerebral ventricular enlargement are the most common reported fetal features. Single and/or late detectable manifestations account ...
Yoshida Shiro - - 2006
We present a case involving a giant hemangioma of the fetal neck, prenatal diagnosis of which was a teratoma. A 32-year-old pregnant woman was referred to our hospital at 31 weeks' gestation owing to a giant solid mass of the fetal neck and excessive amniotic fluid. The mass seemed to ...
Glenn Orit A - - 2006
MR imaging of the fetal brain is rapidly being embraced in clinical practice. Fetal MR imaging is proving to be a powerful modality with which to evaluate the fetal brain and is a valuable complement to prenatal ultrasound. Structural abnormalities, such as cerebral malformations and destructive lesions, can be sonographically ...
Bonfils M - - 2006
In a retrospective study of 22 neonates with congenital diaphragmatic hernia, fetal lung volume (FLV) measured by magnetic resonance imaging was associated with survival; the best FLV ratio cut-off to predict mortality was 30% of expected FLV. This study supports a correlation between FLV and the chances of survival.
Rados Marko - - 2006
In this review, we demonstrate the developmental appearance, structural features, and reorganization of transient cerebral zones and structures in the human fetal brain using a correlative histological and MRI analysis. The analysis of postmortem aldehyde-fixed specimens (age range: 10 postovulatory weeks to term) revealed that, at 10 postovulatory weeks, the ...
Brugger Peter C - - 2006
This review deals with the in vivo magnetic resonance imaging (MRI) appearance of the human fetal abdomen. Imaging findings are correlated with current knowledge of human fetal anatomy and physiology, which are crucial to understand and interpret fetal abdominal MRI scans. As fetal MRI covers a period of more than ...
Whitby E H - - 2006
Post-mortem magnetic resonance (MR) imaging is of increasing interest not only as an alternative to autopsy but as a research tool to aid the interpretation and diagnosis of in utero MR images. The information from the post-mortem MR has allowed the development of imaging sequences applicable to in utero imaging ...
Brugger Peter C - - 2006
Although magnetic resonance imaging (MRI) of the fetus is considered an established adjunct to fetal ultrasound, stacks of images alone cannot provide an overall impression of the fetus. The present study evaluates the use of thick-slab T2-weighted MR images to obtain a three-dimensional impression of the fetus using MRI. A ...
Wedegärtner Ulrike - - 2006
Congenital diaphragmatic hernia (CDH) is associated with a high mortality, which is mainly due to pulmonary hypoplasia and secondary pulmonary hypertension. In severely affected fetuses, tracheal occlusion (TO) is performed prenatally to reverse pulmonary hypoplasia, because TO leads to accelerated lung growth. Prenatal imaging is important to identify fetuses with ...
Hengstschläger Markus - - 2006
The use of fetal magnetic resonance imaging (MRI), in addition to prenatal genetic testing and sonography, has the potential to improve prenatal diagnosis of genetic disorders. MRI plays an important role in the evaluation of fetal abnormalities and malformations. Fetal MRI often enables a differential diagnosis, a determination of the ...
Blaicher Wibke - - 2006
The goal of this study was to provide a representative description of the normal placenta with contrast medium-free magnetic resonance imaging (MRI) in order to determine a standard of reference. One hundred consecutive singleton pregnancies were investigated by MRI without application of a contrast medium. The mean gestational age (GA) ...
Gardiner Helena M - - 2006
Advances in genetics and computing have contributed to a better understanding of the mechanisms underlying cardiovascular development, its programming and possible therapeutic manipulation. Pre-conceptual folate can reduce the prevalence of cardiac malformations and improvements in imaging allow us to detect congenital heart disease and assess function at earlier gestations. Three- ...
Prayer Daniela - - 2006
Normal fetal brain maturation can be studied by in vivo magnetic resonance imaging (MRI) from the 18th gestational week (GW) to term, and relies primarily on T2-weighted and diffusion-weighted (DW) sequences. These maturational changes must be interpreted with a knowledge of the histological background and the temporal course of the ...
Kasprian Gregor - - 2006
Normal fetal lung development is a complex process influenced by mechanical and many biochemical factors. In addition to ultrasound, fetal magnetic resonance imaging (MRI) constitutes a new method to investigate this process in vivo during the second and third trimester. The techniques of MRI volumetry, assessment of signal intensities, and ...
Ward Valerie L - - 2006
OBJECTIVE: To establish normative data for the size, conspicuity, and imaging characteristics of normal developing fetal sheep organs on ultrasound (US) and magnetic resonance (MR) imaging. METHODS: US and MR images of ten normal pregnant sheep, at 40, 65, 90, 115, and 140 gestational days (term = 145 days), were ...
Triulzi Fabio - - 2006
In the last few years fetal magnetic resonance imaging (MRI) has been proposed as a second level technique in the evaluation of fetal brain anomalies. It has been demonstrated that MRI is highly accurate in illustrating the morphologic changes of developing brain and fetal brain abnormalities being a useful procedure ...
Rossi Andrea - - 2006
OBJECTIVE: To describe prenatal magnetic resonance imaging (MRI) findings of dural sinus malformation (DSM), a very rare, congenital form of dural arteriovenous shunt (DAVS), typically affecting newborns. METHODS: Ultrasound (US) and MRI were performed at 34 weeks' gestation, and the findings of these examinations were compared with postnatal MRI studies ...
Wilson Robin K - - 2006
BACKGROUND: A 17-year-old pregnant woman presented to hospital at 19 weeks' gestation with an 8-week history of hyperemesis gravidarum, 16.8 kg of weight loss, and new-onset weakness, dizziness and blurred vision. Examination of the patient showed confusion, papilledema, ophthalmoparesis, nystagmus, reduced hearing and truncal ataxia. INVESTIGATIONS: Physical examination, abdominal ultrasound, ...
Itoh Shigeru - - 2006
OBJECTIVE: To present the usefulness of fetal magnetic resonance (MR) imaging for accurate diagnosis of Pfeiffer syndrome type II. CASE AND METHODS: A 19-year-old woman was referred to us at 29 weeks of gestation for prenatal management of hydrocephalus. Ultrasonography of the fetus showed cloverleaf skull with dilated lateral ventricles, ...
< 5 6 7 8 9 10 11 12 13 14 15 >