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Results 401 - 450 of 993
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Nijs Els L F - - 2007
The purpose of this article is to provide an overview of the most common anatomic, congenital, and developmental anomalies of the pancreas. Familiarity with the imaging appearances of these anomalies as well as the range of normal appearance is important to differentiate them from other conditions, especially since some of ...
Ando Kumiko - - 2007
INTRODUCTION: Chiari type II malformation (CMII) is one of three hindbrain malformations that display hydrocephalus. We have observed that cerebrospinal fluid (CSF) signal in the posterior fossa, which is always apparent on normal fetal MR images, is not visible in a fetus with CMII. We use the term 'tight posterior ...
McDevitt Helen - - 2007
Congenital anomalies causing airway obstruction in the newborn are potentially fatal. However if an effective airway can be maintained the long-term prognosis is often excellent. We present four cases of airway obstruction, three of which were diagnosed antenatally. We discuss the role of antenatal imaging and review delivery options including ...
Miyazaki Osamu - - 2007
We report a case of chondrodysplasia punctata tibia-metacarpal type (CDP-TM) that was diagnosed prenatally using multidetector CT (MDCT) with three-dimensional (3-D) CT reconstructions. Prenatal US had shown severe thoracic hypoplasia and rhizomelic shortening of the limbs, raising the suspicion of thanatophoric dysplasia. However, MDCT showed punctate calcifications in the epiphyseal ...
Robinson Ashley J - - 2007
Fetal magnetic resonance provides a new tool in the imaging of the posterior fossa and is proving useful in cases that are difficult to assess sonographically by allowing further assessment of the fourth ventricle, cisterna magna, and vermian growth and development. We describe various criteria with which to evaluate vermian ...
Oh Karen Y - - 2007
OBJECTIVES: Recognize posterior fossa anomalies on ultrasound and magnetic resonance imaging and appreciate imaging pitfalls that may lead to misdiagnosis. MATERIALS AND METHODS: Cases are presented to illustrate normal development and various anomalies. Postnatal studies and autopsy are used for correlation with prenatal imaging. RESULTS: Normal anatomy and anomalies are ...
Dykes Thomas M - - 2007
The educational objectives of this continuing medical education activity are for the reader to exercise, self-assess, and improve skills in diagnostic radiology with regard to the interpretation of hysterosalpingograms and magnetic resonance imaging (MRI) of the female pelvis in the evaluation of recurrent reproductive failure caused by congenital uterine anomalies. ...
Sohn Yong-Seok - - 2007
PURPOSE: Fast MRI has provided detailed and reproducible fetal anatomy. This study was performed to evaluate the usefulness of fetal MRI for prenatal diagnosis. MATERIALS AND METHODS: Fifty-six fetuses with congenital abnormalities on ultrasonography were evaluated by fetal MRI from 2001 to 2004 in Severance Hospital. Final diagnosis was made ...
Oishi Motoi - - 2007
The pH-sensitive PEGylated nanogels constructed from tethered PEG chains and a polyamine gel core containing 19F compounds showed remarkable on-off regulation of 19F MR (magnetic resonance) signals in response to the extracellular pH (6.5) of the tumor environment, even in the presence of 90% fetal bovine serum, due to the ...
Lissauer David - - 2007
Fetal lower urinary tract obstruction affects 2.2 per 10,000 births. It is a consequence of a range of pathological processes, most commonly posterior urethral valves (64%) or urethral atresia (39%). It is a condition of high mortality and morbidity associated with progressive renal dysfunction and oligohydramnios, and hence fetal pulmonary ...
Papadias A - - 2008
AIM: To assess the diagnostic capability of fetal magnetic resonance imaging (MRI) in children suspected antenatally to harbor central nervous system (CNS) defects that require immediate postnatal neurosurgical treatment. MATERIALS AND METHODS: Between 2003 and 2005, 13 fetal MRI scans were performed in mothers suspected to have fetuses with congenital ...
Sunagawa Sorahiro - - 2007
Although prenatal diagnosis of VACTERL (vertebral defects, anal atresia, cardiac anomaly, tracheal-esophageal fistula with esophageal atresia, renal defects, and radial limb dysplasia) association is not always possible, ultrasonography and magnetic resonance imaging can visualize some of the characteristic findings of this condition. Because infants with this condition usually require significant ...
Smith Alice B - - 2007
We report a case of Chiari III malformation diagnosed by fetal MRI. Ultrasound (US) performed at a gestational age of 18 weeks demonstrated a posterior skull base cyst. Repeat US at 19 weeks demonstrated neural tissue in the cyst, consistent with an encephalocele. MR imaging at 23 weeks confirmed the ...
Pungavkar Sona A - - 2007
Iniencephaly is an uncommon and fatal neural tube defect involving the occiput and inion, this occurs together with rachischisis of the cervical and thoracic spine, and retroflexion of the head. We report the ultrasound (US) and magnetic resonance (MR) imaging findings of a case of iniencephaly with clubfeet and arthrogryposis. ...
Picone O - - 2007
Hydrocolpos should be considered systematically when an abdominopelvic cystic mass is diagnosed in a female fetus. Because the prognosis and neonatal management of isolated hydrocolpos with spontaneous resolution differs greatly from that of hydrocolpos associated with a cloacal malformation, it is important to ascertain prenatally whether there are associated anomalies. ...
Salmaso R - - 2007
We discuss the use of magnetic resonance imaging (MRI) to reveal early fetal neurological involvement of cytomegalovirus (CMV) infection. A woman presented at 21 weeks of pregnancy with active CMV infection. Cerebral ultrasound examination had been normal. An MRI scan revealed a thickened germinal matrix, which was histologically confirmed, associated ...
Zhao Hui - - 2007
The difficulty of utilizing multimodality diagnostic imaging techniques for fetal surveillance remains one of the greatest challenges in providing enhanced prenatal care. In this Letter we demonstrate the feasibility of performing fetal magnetocardiography (fMCG) and ultrasound/Doppler imaging simultaneously, using a multichannel SQUID magnetometer and a portable ultrasound scanner. Despite large ...
Tilea B - - 2007
OBJECTIVES: To compare magnetic resonance imaging (MRI) and fetopathological findings in the evaluation of non-cystic fetal posterior fossa anomalies and to describe associated abnormalities. METHODS: This was a prospective study from 2000 to 2005 of fetuses identified on ultrasound as having sonographic suspicion of posterior fossa malformation. All underwent a ...
Levin Terry L - - 2007
The spectrum of congenital anomalies of the male urethra is presented. The embryologic basis of each anomaly, when known, is discussed. Clinical and imaging features of each entity are presented.
Pedreira Denise Araújo Lapa - - 2007
PURPOSE: To produce a myelomeningocele-like human defect in the ovine fetus and validate this experimental model in our population. METHODS: A prospective study on 12 pregnant sheep of a crossed Hampshire/Down breed where a spinal defect was surgically created between Day 75 and Day 77 after conception. The technique consisted ...
Hagmann C F - - 2007
The aim of this study was to compare postmortem magnetic resonance imaging (MRI) of the renal system with autopsy in perinatal and fetal deaths. 37 deaths were studied and renal abnormalities were found in five of these cases. Postmortem MRI provided information of diagnostic utility comparable to that obtained by ...
Aguh Chike J - - 2007
INTRODUCTION: A 28-year old female presented with a non-radiating persistent left upper quadrant pain and tenderness for 5 weeks. METHODS: A preliminary CT scan displayed bony structures in the spleen. A delayed scanning subsequently showed the bones to have changed position, consistent with a life fetus. RESULTS: Ultrasound confirmed the ...
Shono Takeshi - - 2007
BACKGROUND/PURPOSE: Cloacal malformations are rare anomalies, occurring in females, and in which they demonstrate a single perineal orifice for urethra, vagina, and rectum. Prenatal ultrasonograms (US) of cloacal malformations sometimes show ascites, hydrocolpos, and hydronephrosis. We herein describe the characteristic prenatal US and magnetic resonance imaging (MRI) findings of the ...
Laifer-Narin Sherelle - - 2007
PURPOSE OF REVIEW: To describe advances in magnetic resonance technology and the current indications and advantages of magnetic resonance imaging that have led to increased utilization in fetal medicine. RECENT FINDINGS: The article covers the most common uses of magnetic resonance imaging in fetal medicine. The advantages of magnetic resonance ...
McMahon C J - - 2007
We report two cases of pentalogy of Cantrell diagnosed in utero using a combination of fetal echocardiography and magnetic resonance imaging. The cardiac component consisted of tetralogy of Fallot in the first fetus and ventricular septal defect in the second fetus. Whereas fetal echocardiography allowed accurate delineation of the cardiac ...
Huisman Thierry A G M - - 2008
Fetal magnetic resonance imaging (MRI) is considered a valuable second line imaging tool for confirmation, completion and correction of complex fetal ultrasonography findings. Fetal MRI has proven its value in pathologies of the central nervous system. Few studies have focussed on the value of fetal MRI in abdominal pathologies. With ...
Mühler Matthias R - - 2007
BACKGROUND: Tuberous sclerosis complex (TSC) is an autosomal dominant phakomatosis associated with intracardiac rhabdomyomas. OBJECTIVE: The aim of our study was to examine the value of cerebral MRI in diagnosing TSC in fetuses with intracardiac rhabdomyomas, applying the TSC Consensus Conference (TSCCC) criteria. MATERIALS AND METHODS: In a prospective manner ...
El-Bialy Gehan - - 2007
BACKGROUND: Placenta percreta is a rare obstetric condition associated with life-threatening hemorrhage. MR imaging has a role in prenatal diagnosis of these cases. However, its role in the postnatal diagnosis and in the follow up yet to be established. CASE: A 33-year-old patient has adherent placenta following spontaneous delivery at ...
Guimarães Filho Hélio Antonio - - 2007
OBJECTIVES: To compare fetal heart evaluation done through two-dimensional (2DUS) and three-dimensional ultrasonography (3DUS) as to optimal plane imaging, image quality, and time needed to perform the examination. METHODS: Prospective study involving 12 normal pregnant women, with gestational ages ranging from 22 to 26 weeks, scanned with a VOLUSON 730 ...
Prayer Daniela - - 2007
The understanding of the presentation of normal organ development on fetal MRI forms the basis for recognition of pathological states. During the second and third trimesters, maturational processes include changes in size, shape and signal intensities of organs. Visualization of these developmental processes requires tailored MR protocols. Further prerequisites for ...
Langer Thorsten - - 2007
We report on the case of a female twin with congenital thoracic neuroblastoma after conception via intracytoplasmatic sperm injection (ICSI). Birth occurred at 37 + 1-week gestation per primary sectio caesarea. Acute respiratory distress necessitated intubation and mechanical ventilation. Ultrasound and magnetic resonance imaging (MRI) showed a mass in the ...
Bulas Dorothy - - 2007
Ultrasonography is the screening method of choice for the evaluation of the fetus. It is safe, inexpensive, and easily performed. However, it is operator dependent, and evaluation may be limited because of fetal position, maternal obesity, overlying bone, and/or oligohydramnios. Magnetic resonance imaging is an alternative modality that uses no ...
Fjørtoft M Irsutti - - 2007
INTRODUCTION: The aim of our study was to assess the utility and reliability of magnetic resonance imaging (MRI) in antenatal diagnosis of craniosynostosis. METHODS: We retrospectively reviewed the MRI examinations of the head of 15 fetuses requested over a period of 11 years on the basis of sonographic suspicion of ...
Lee Young Mi - - 2007
Prenatal diagnosis has embraced a recent wave of innovative imaging modalities including three-dimensional (3D) ultrasound and fetal magnetic resonance imaging (MRI). Traditional two-dimensional (2D) ultrasonography remains the standard method by which major structural abnormalities are diagnosed antenatally, but advances in technology are opening new doors. Growth in our knowledge about ...
Barnewolt Carol E - - 2007
PURPOSE: This study was aimed at determining whether a new method of analyzing lung volumes on fetal magnetic resonance (MR) imaging could be used to predict the degree of pulmonary compromise in congenital diaphragmatic hernia (CDH). METHODS: Seventeen fetuses with CDH were prospectively evaluated by MR. Lung volumes were measured ...
Anquez J J Signal and Image Processing Department, GET-Telecom Paris (ENST)-CNRS UMR 5141 LTCI, Paris, - - 2007
Fetal magnetic resonance imaging (MRI) has been gaining interest over the last two decades. Current fast MRI sequences provide imaging data of the whole uterus in less than 20 seconds, avoiding fetal motion related artifacts without any maternal or fetal sedation. MRI has proved to be a useful adjunct to ...
Kantarci Mecit - - 2006
Conjoined twins are a rare and often catastrophic obstetrical event. Although ultrasonography is widely used in the diagnosis of conjoined twins, it may fail to demonstrate the details in fetuses with complex anomalies, especially during late pregnancy. We present an omphalopagus conjoined twins case evaluated by HASTE magnetic resonance imaging, ...
McEwing Rachael L - - 2006
Prenatal ultrasound and magnetic resonance imaging (MRI) demonstrated a large oropharyngeal tumor, and cardiac and cranial abnormalities consistent with neurofibromatosis type 1 (NF1) in a third-trimester fetus, which were confirmed on postmortem examination. Sonographic features of NF1 are generally nonspecific; MR examination provided significant additional information, facilitating prenatal diagnosis.
Levine Deborah - - 2006
OBJECTIVE: The objective of our study was to assess the visibility of the fetal corpus callosum and soft palate on standard single-shot fast spin-echo (SSFSE) imaging versus real-time (RT) SSFSE imaging. SUBJECTS AND METHODS: Part 1 of the study was a prospective analysis using a questionnaire rating the ease of ...
Gil-da-Silva-Lopes Vera Lúcia - - 2006
The aim of this study were to describe and to compare structural central nervous system (CNS) anomalies detected by magnetic resonance image (MRI) and computed tomography (CT) in individuals affected by midline facial defects with hypertelorism (MFDH) isolated or associated with multiple congenital anomalies (MCA). The investigation protocol included dysmorphological ...
Sandrasegaran Kumaresan - - 2006
PURPOSE OF REVIEW: Fetal magnetic resonance imaging is becoming more used in the evaluation of complex fetal abnormalities. Rapid advances in the technology and application of fetal magnetic resonance imaging necessitate a review of this subject. RECENT FINDINGS: Diffusion-weighted imaging, magnetic resonance spectroscopy and functional magnetic resonance imaging may allow ...
Breeze A C G - - 2006
OBJECTIVES: Postmortem magnetic resonance imaging (MRI) may be an alternative to conventional autopsy. However, it is unclear how confident radiologists are in reporting such studies. We sought to determine the confidence with which radiologists report on various fetal organs by developing a scale to express their confidence of normality and ...
Yeh Benjamin M - - 2006
Taillieu et al have shown that it is possible to noninvasively measure the placental blood flow, fractional volume of the maternal vascular placental compartment, and rate of transfer of contrast material between the maternal and fetal circulation in gravid mice through the use of dynamic contrast-enhanced MR imaging. Clearly, much ...
Kline-Fath Beth M - - 2007
BACKGROUND: Since the development of fast imaging sequences, MR has proved to be a helpful tool in the evaluation of fetal pathology. Because of the high water content of fetal tissues and pathology, hydrography imaging (MR fetography) can provide additional diagnostic information. OBJECTIVE: To demonstrate the benefit of MR fetography ...
Mota Raquel - - 2007
The EXIT procedure (EX utero Intrapartum Treatment) encompasses a multidisciplinary approach to situations in which airway obstruction is anticipated. Uteroplacental circulation is maintained to avoid neonatal hypoxemia while intubation is attempted. Not only is it useful in congenital diaphragmatic hernia with intrauterine tracheal occlusion, but new indications have been proposed. ...
Rohrbach M - - 2007
We report a fetus with exencephaly diagnosed by fetal magnetic resonance imaging (MRI) at 17 weeks of gestation. Fetal ultrasound performed at 13 and 17 weeks of gestation suggested occipital encephalocele. However, the fetal MRI done at 17 weeks of gestation showed exencephaly and suggested amniotic bands as the cause. ...
Lax Allison - - 2007
OBJECTIVE: The objective of this study was to determine imaging features that may help predict the presence of placenta accreta, placenta increta or placenta percreta on prenatal MRI scanning. SUBJECTS AND METHODS: A retrospective review of the prenatal MR scans of 10 patients with a diagnosis of placenta accreta, placenta ...
Dietrich Rosalind B - - 2006
Ultrasonography is the primary prenatal screening modality used in the evaluation of the fetus and the maternal pelvis. However, fetal MR imaging plays a complementary role to prenatal ultrasound in the evaluation of the fetus with suspected abnormalities. MR imaging's role includes confirming or excluding possible lesions, defining their full ...
Righini A - - 2006
BACKGROUND AND PURPOSE: Epileptic syndromes or neurodevelopmental delay may be associated with congenital anomalies of the shape or the orientation of the hippocampus. Scarce data are available about quantitative hippocampal developmental changes during fetal life, in particular about the progressive rotational changes of the hippocampal infolding angle (HIA), which can ...
Kline-Fath Beth M - - 2007
BACKGROUND: Twin-twin transfusion syndrome (TTTS) is a complication of monochorionic/diamniotic twin pregnancies. An imbalance of blood flow occurs through placental anastomoses, causing potentially significant morbidity and mortality in both twins. Although the sonographic findings of TTTS are well documented, we believe that MR imaging is a valuable adjunct. OBJECTIVE: We ...
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