Journal ArticleJ Comput Assist Tomogr · July 2023
Photon-counting computed tomography (PCCT) offers better high-resolution and noise performance than energy integrating detector (EID) CT. In this work, we compared both technologies for imaging of the temporal bone and skull base. A clinical PCCT system an ...
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Journal ArticleSci Transl Med · February 8, 2023
D2C7-immunotoxin (IT), a dual-specific IT targeting wild-type epidermal growth factor receptor (EGFR) and mutant EGFR variant III (EGFRvIII) proteins, demonstrates encouraging survival outcomes in a subset of patients with glioblastoma. We hypothesized tha ...
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Journal ArticleJ Vasc Interv Radiol · December 2022
PURPOSE: To measure the ablation zone temperature and nontarget tissue temperature during radiofrequency (RF) ablation in bone containing metal instrumentation versus no metal instrumentation (control group). MATERIALS AND METHODS: Ex vivo experiments were ...
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Journal ArticleClin Imaging · May 2022
PURPOSE: To evaluate patient outcomes after sacroplasty (percutaneous sacral augmentation) with guidance using CT compared to fluoroscopy with augmented reality overlay using fluoroscopic cone-beam CT and FDA-approved software (CBCT-AF). MATERIALS AND METH ...
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Journal ArticleAJNR Am J Neuroradiol · March 2022
BACKGROUND AND PURPOSE: Selumetinib is a promising MAP (mitogen-activated protein) kinase (MEK) 1/2 inhibitor treatment for pediatric low-grade gliomas. We hypothesized that MR imaging-derived ADC histogram metrics would be associated with survival and res ...
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Journal ArticlePediatr Radiol · September 2021
BACKGROUND: Neonates and young children require efficacious magnetic resonance imaging (MRI) examinations but are potentially more susceptible to the short- and long-term adverse effects of gadolinium-based contrast agents due to the immaturity of their bo ...
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Journal ArticleAJNR Am J Neuroradiol · December 2019
BACKGROUND AND PURPOSE: Contrast-enhanced MR imaging provides essential information for pediatric imaging applications. We evaluated gadobenate dimeglumine for contrast-enhanced MR imaging of infants younger than 2 years of age. MATERIALS AND METHODS: Nine ...
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Journal ArticleLancet Oncol · July 2019
BACKGROUND: Paediatric low-grade glioma is the most common CNS tumour of childhood. Although overall survival is good, disease often recurs. No single universally accepted treatment exists for these patients; however, standard cytotoxic chemotherapies are ...
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Journal ArticleJ Am Coll Radiol · March 2019
Patient-centric care has garnered the attention of the radiology community. The authors describe a patient-centric approach to iodinated contrast administration designed to optimize the diagnostic yield of contrast-enhanced CT while minimizing patient iodi ...
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Journal ArticleMol Genet Metab · February 2018
BACKGROUND: Recombinant human acid α-glucosidase (rhGAA) enzyme replacement therapy (ERT) has prolonged survival in infantile Pompe disease (IPD), but has unmasked central nervous system (CNS) changes. METHODS: Brain imaging, consisting of computed tomogra ...
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Journal ArticleJ Magn Reson Imaging · February 2015
Dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) is used to track the first pass of an exogenous, paramagnetic, nondiffusible contrast agent through brain tissue, and has emerged as a powerful tool in the characterization of brain tumor ...
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Journal ArticleBMC Med Genomics · June 25, 2014
BACKGROUND: Chiari Type I Malformation (CMI) is characterized by herniation of the cerebellar tonsils through the foramen magnum at the base of the skull, resulting in significant neurologic morbidity. As CMI patients display a high degree of clinical vari ...
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Journal ArticleAm J Transplant · March 2014
The vascular reorganization after facial transplantation has important implications on future surgical planning. The purpose of this study was to evaluate blood flow (BF) after full face transplantation using wide area-detector computed tomography (CT) tec ...
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Journal ArticleAnn Hum Genet · January 2014
Chiari Type I Malformation (CMI) is characterized by herniation of the cerebellar tonsils through the base of the skull. Although cerebellar tonsillar herniation (CTH) is hypothesized to result from an underdeveloped posterior cranial fossa (PF), patients ...
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Chapter · January 1, 2014
Neurosurgical conditions and emergencies frequently rely on neuroradiology to provide diagnostic information about a patient. The neuroradiology subspecialty provides and interprets CT, MRI, Ultrasound, and X-ray services that provide critical information ...
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Journal ArticleAJR Am J Roentgenol · November 2013
OBJECTIVE: The purpose of this study was to measure the organ doses and estimate the effective dose for the standard brain perfusion CT protocol and erroneous protocols. MATERIALS AND METHODS: An anthropomorphic phantom with metal oxide semiconductor field ...
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Journal ArticleAJNR Am J Neuroradiol · October 2013
Facial allotransplantation replaces missing facial structures with anatomically identical tissues, providing desired functional, esthetic, and psychosocial benefits far superior to those of conventional methods. On the basis of very encouraging initial res ...
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Journal ArticleAJR Am J Roentgenol · September 2013
OBJECTIVE: This article addresses questions that radiologists frequently ask when planning, performing, processing, and interpreting MRI perfusion studies in CNS imaging. CONCLUSION: Perfusion MRI is a promising tool in assessing stroke, brain tumors, and ...
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Journal ArticleAJNR Am J Neuroradiol · January 2013
BACKGROUND AND PURPOSE: There is a paucity of information present in the current literature with regard to the role of SPMI performance in academic radiology centers. Our aim was to evaluate the current practice patterns for the performance of SPMIs in aca ...
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Journal ArticleAJR Am J Roentgenol · January 2013
OBJECTIVE: This and its companion article address the 10 most frequently asked questions that radiologists face when planning, performing, processing, and interpreting different MR perfusion studies in CNS imaging. CONCLUSION: Perfusion MRI is a promising ...
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Journal ArticlePLoS One · 2013
Chiari Type I Malformation (CMI) is characterized by displacement of the cerebellar tonsils below the base of the skull, resulting in significant neurologic morbidity. Although multiple lines of evidence support a genetic contribution to disease, no genes ...
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Journal ArticleMed Phys · June 2012
PURPOSE: The purpose of this study was three-fold: 1) to estimate the organ doses and effective dose (ED) for patients undergoing neuro 3D-imaging protocols, 2) to study the effect of beam collimation on ED, and 3) to derive protocol-specific DAP-to-ED con ...
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Journal ArticleRadiat Prot Dosimetry · June 2012
The purpose of this study was to measure organ doses and the effective dose (ED) using a three-dimensional rotational X-ray (3D-RX) system and to determine the ED conversion factor from the dose area product (DAP) for skull, spine and biliary protocols. A ...
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Journal ArticleSurg Neurol Int · 2012
BACKGROUND: The purpose of this study is to retrospectively review our experience with stent-assisted embolization of patients with an acutely ruptured cerebral aneurysm. METHODS: Medical records and imaging were reviewed for 36 patients who underwent sten ...
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Journal ArticleNeurosurgery · August 2011
BACKGROUND: The Neuroform Stent has facilitated the endovascular treatment of wide-necked cerebral aneurysms. It is unknown which factors pose risks of thromboembolic events after stent placement. OBJECTIVE: This series is the largest single-center study r ...
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Journal ArticleJ Neurosurg · January 2011
OBJECT: Inadvertent catheterization of brachiocephalic arteries (carotid artery, subclavian artery, or vertebral artery) during attempted placement of a central venous catheter can have potentially disastrous complications. While removal of the catheter in ...
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Journal Article · December 1, 2008
The evolution of multidetector computed tomography (MDCT) has allowed the development and advancement of CT angiography (CTA). While the concept of carotid artery evaluation by CT was introduced by Heinz and others in 1984 [1,2], it has taken recent techno ...
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Journal ArticleAm J Med Genet A · December 15, 2006
Chiari type I malformation (CMI; OMIM 118420) is narrowly defined when the tonsils of the cerebellum extend below the foramen magnum, leading to a variety of neurological symptoms. It is widely thought that a small posterior fossa (PF) volume, relative to ...
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Journal ArticleTech Vasc Interv Radiol · December 2006
Computed tomography angiography (CTA) is a rapidly developing technology with great potential. This is particularly true for evaluating neurovascular disease. Clinical stroke because of atherosclerotic disease of the carotid and vertebral arteries is a com ...
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Journal ArticleEnviron Health Perspect · October 2006
BACKGROUND: Folate metabolism pathway genes have been examined for association with neural tube defects (NTDs) because folic acid supplementation reduces the risk of this debilitating birth defect. Most studies addressed these genes individually, often wit ...
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Journal Article · January 1, 2006
The evolution of multidetector computed tomography (MDCT) has allowed the development and advancement of CT angiography (CTA). While the concept of carotid artery evaluation by CT was introduced by Heinz and others in 1984 [1, 2], it has taken recent techn ...
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Journal ArticleJ Med Genet · December 2005
Neural tube defects (NTDs) are the second most common birth defects (1 in 1000 live births) in the world. Periconceptional maternal folate supplementation reduces NTD risk by 50-70%; however, studies of folate related and other developmental genes in human ...
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Journal ArticleBirth Defects Res A Clin Mol Teratol · November 2005
BACKGROUND: Vitamin A (retinol), in the form of retinoic acid (RA), is essential for normal development of the human embryo. Studies in the mouse and zebrafish have shown that retinol is metabolized in the developing spinal cord and must be maintained in a ...
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Journal ArticleHum Genet · July 2005
Neural tube defects (NTDs) are common birth defects, occurring in approximately 1/1,000 births; both genetic and environmental factors are implicated. To date, no major genetic risk factors have been identified. Throughout development, cell adhesion molecu ...
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Journal ArticleStroke · May 2005
BACKGROUND: Intra-arterial thrombolysis (IAT) for peri-coronary angiography (CA) stroke may be safe and efficacious. However, IAT may increase the risk of intracranial hemorrhage (ICH). METHODS: A retrospective study was performed involving 3 university ho ...
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Journal ArticleAJNR Am J Neuroradiol · April 2005
BACKGROUND AND PURPOSE: The effect of vessel patency, following recombinant tissue plasminogen activator (rtPA) administration, on clinical outcome in acute ischemic stroke (AIS) has been controversial. We studied the effect of recanalization following int ...
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Journal ArticleGenet Med · January 2005
PURPOSE: Neural tube defects (NTDs) are a group of widely varying congenital malformations resulting from incomplete or improper fusion of the neural tube during embryonic development. NTDs are traditionally classified by the presence or absence of a layer ...
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Journal ArticleNeurosurgery · December 2004
OBJECTIVE: To determine the safety of early percutaneous endovascular carotid angioplasty and stenting (CAS) after an ischemic stroke. METHODS: The neurointerventional database was reviewed for patients who underwent CAS after an acute ischemic stroke in t ...
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Journal ArticleBirth Defects Res A Clin Mol Teratol · August 2004
BACKGROUND: Neural tube defects (NTDs) are the second most common birth defects, after congenital heart defects. Telomerase, the reverse transcriptase that maintains telomere DNA, has been shown to be important for neural tube development and bilateral sym ...
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Journal ArticleNeurosurgery · February 2004
OBJECTIVE: To determine whether there are magnetic resonance imaging (MRI) characteristics of fatty fila that are correlated with neurological deficits, especially in the presence of a normal-level conus medullaris. METHODS: Lumbosacral MRI scans were revi ...
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Journal ArticleJ Genet Couns · August 2003
Chiari type I malformation has traditionally been defined as a downward herniation of the cerebellar tonsils of ≥5 mm through the foramen magnum and it is likely associated with a volumetrically reduced posterior fossa. Syringomyelia is commonly associated ...
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Journal ArticleClin Genet · March 2003
Folate supplementation appears to reduce the risk for neural tube defects (NTDs). Methylenetetrahydrofolate reductase (MTHFR) is a candidate gene in the folate metabolism pathway that has been extensively studied in different human populations. We examined ...
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Journal ArticleJ Neurosurg · February 2003
Three patients with carotid artery (CA) pseudoaneurysms were treated using four polyethylene terephthalate endografts (Wallgraft endoprostheses). Two patients received a single graft and one patient with bilateral pseudoaneurysms received two grafts. Compl ...
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Journal ArticleAm J Med Genet · July 1, 2002
We investigated the T locus as a candidate gene in a series of patients and families with lumbosacral myelomeningocele. Single-strand conformation polymorphism (SSCP) analysis was used to identify sequence variation in all 8 exons and in intron 7 of this l ...
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Journal ArticleSpine (Phila Pa 1976) · May 15, 2002
STUDY DESIGN: Magnetic resonance image grading of lumbar spinal stenosis severity was analyzed retrospectively using a common clinical format. OBJECTIVE: To assess the interobserver and intraobserver reliability of magnetic resonance image used to grade pa ...
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Journal ArticleJ Neurogenet · 2002
Neural tube defects (NTD) are a common birth defect, with both genetic and environmental contributions to their etiology. In mouse, null mutations in Noggin result in fully-penetrant NTDs. We investigated Noggin for mutations that may predispose to human N ...
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Journal ArticleNeuroradiology · December 2001
Endodermal cysts are rare congenital intracranial lesions. Although histologically benign, they can become symptomatic as a result of mass effect and cause neurological deficits. We report a 30-year-old woman who presented with paresis of her right oculomo ...
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Journal ArticleRadiology · July 2001
PURPOSE: To determine the radiation dose to radiologists who perform computed tomographic (CT) fluoroscopic interventional procedures by using a quick-check method and a low-milliampere technique. MATERIALS AND METHODS: Two hundred twenty CT fluoroscopy--g ...
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Journal ArticleNeurosurg Focus · March 15, 2000
In several reports the authors have suggested occasional familial aggregation of syringomyelia and/or Chiari 1 malformation (CM1). Familial aggregation is one characteristic of traits that have an underlying genetic basis. The authors provide evidence for ...
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Journal ArticlePediatr Neurosurg · January 2000
Neural tube defects (NTD) are one of the most common birth defects and are caused by both environmental and genetic factors. The approach to identifying the genes predisposing to NTD, through linkage analysis and candidate gene analysis, is reviewed along ...
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Journal ArticleClin Genet · August 1999
Neural tube defects are a common, complex disorder with genetic and environmental components to risk. We investigated the previously reported interaction between homozygosity for the thermolabile variant at the methylenetetrahydrofolate reductase and heter ...
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Journal ArticleJ Nucl Med · April 1998
Metastatic tumor is one of several etiologies of space-occupying masses in the orbit that accounts for 1%-13% of all orbital masses (1). In the adult patient population, breast cancer is the most common tumor to metastasize to the orbit followed by metasta ...
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Journal ArticleNeuroimaging Clin N Am · May 1997
Syphilis has become much more prevalent because of the dramatic increase in immunocompromised patients. The increase in immunocompromised patients is mainly secondary to AIDS. This article is put forth to refamiliarize the reader with syphilis, specificall ...
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Journal ArticleNeuroimaging Clin N Am · May 1997
Fungal infections of the central nervous system are quite uncommon and most frequently occur in immunocompromised patients, such as those with AIDS. This article outlines the most common fungal infections that occur in the central nervous system. Even thou ...
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Journal ArticleNeuroimaging Clinics of North America · January 1, 1997
Fungal infections of the central nervous system are quite uncommon and most frequently occur in immunocompromised patients, such as those with AIDS. This article outlines the most common fungal infections that occur in the central nervous system. Even thou ...
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Journal ArticleTop Magn Reson Imaging · June 1996
This review discusses the eighth cranial nerve with emphasis on magnetic resonance imaging (MRI). Normal anatomy of the component nerves as well as pathology that affects it are examined. MRI techniques used to evaluate this area are also presented. ...
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Journal ArticleJ Comput Assist Tomogr · 1996
Leptomeningeal enhancement on CT and MR imaging studies secondary to cryptococcal meningitis is an uncommon finding. In immunocompromised patients, this meningitis incites only a mild inflammatory reaction and abnormalities are often absent on imaging stud ...
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Journal ArticlePediatr Radiol · November 1995
We report two cases of papillary meningioma in children. The MRI appearance of this special type of meningioma is described for the first time. Both lesions were dura based and associated with cystic components. We review the literature pertaining to this ...
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Journal ArticlePlast Reconstr Surg · February 1980
The measurement of adherence is a function of pulling force and velocity. The machine described measures and records adherence accurately and precisely. In both engineering and clinical laboratory tests, it has shown the ability to be used as standard equi ...
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Journal ArticleJ Trauma · February 1980
Using a standardized laboratory rat model of burn wound sepsis, a regimen of once a day application of Silvadene has been found to be more effective treatment than Sulfamylon or cerium-Silvadene. Delaying treatment following infection resulted in decreased ...
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