Search Results
Results 701 - 750 of 892
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Taylor-Robinson S D - - 1995
Conventional T1-weighted spin echo (T1WSE) and T1-weighted magnetization transfer (MT) images were obtained in 26 patients with biopsy-proven cirrhosis (nine Child's grade A, 10 Child's grade B and seven Child's grade C). Four subjects showed no evidence of neuropsychiatric impairment on clinical, psychometric and electrophysiological testing, seven showed evidence of ...
Bianchi S - - 1995
OBJECTIVE: To evaluate the role of magnetic resonance imaging (MRI) and computed tomography (CT) in the diagnosis of intramuscular ganglia (IMG) that arise from the superior tibiofibular joint (STFJ). MATERIAL AND METHODS: Our series consisted of three men and three women. Four patients were studied by MRI, one by CT ...
Brismar J - - 1995
PURPOSE: To identify a pattern of findings on CT or MR of the brain in glutaric acidemia type I typical enough to permit a correct diagnosis. METHODS: Clinical history and findings and brain CT and MR results in 59 previously reported patients (MR in 12) and in 5 new patients ...
Yagishita A - - 1995
PURPOSE: To investigate the imaging and pathologic characteristics of acute encephalopathy with bilateral thalamotegmental involvement in infants and children. METHODS: Five Japanese children ranging in age from 11 to 29 months were studied. We performed CT imaging in all patients, 10 MR examinations in four patients, and an autopsy in ...
Schlesinger Y - - 1995
We designed a polymerase chain reaction method to detect herpes simplex virus (HSV) DNA in spinal fluid from patients with encephalitis. The polymerase chain reaction amplified a 211 base-pair segment of the HSV DNA polymerase gene. Applying this method, we diagnosed HSV type 1 infection in three young children, aged ...
Thuluvath P J - - 1995
Increased, symmetrical signals of varying intensity in the globus pallidi on T1-weighted (T1W) images, without corresponding signals on T2-weighted (T2W) images, have been reported previously in chronic hepatic failure. It has been suggested that these signals are characteristic of chronic hepatic encephalopathy. To test this hypothesis, we evaluated the relationship ...
Abbott R - - 1995
Currently, one of the most exciting areas of growth in neurosurgery involves neuroendoscopy. As in the fields of general, gynecologic, orthopaedic, thoracic, and urologic surgery, neurosurgeons are exploring the utility of the endoscope and its changing technology. The use of endoscopes in neurosurgery is actually not new. In 1920 Mixter ...
Darling C F - - 1995
The aim of the investigation was to determine the patterns of cerebral involvement on computed tomography (CT) and magnetic resonance (MR) imaging in post-varicella encephalitis. Four children between the ages of 2 and 11 years presented over a 5-year period with a diagnosis of post-varicella encephalitis. Their imaging studies and ...
Nitinavakarn B - - 1994
An example of subacute necrotizing encephalopathy, the fifth case in Thailand, was recorded. A 7-month-old boy presented clinically with vomiting, lethargy, respiratory difficulty, deteriorated consciousness, and hypotonia. The CT brain scan disclosed bilateral symmetrical radiolucencies in the basal ganglia, especially the lentiform nuclei, and thalami. Postmortem examination of these areas ...
Lera G - - 1994
We report eight patients who had a progressive illness dominated by generalised dystonia and who had clinical and imaging features suggestive of Leigh's syndrome (LS). Six of the eight cases were male. Early development was usually normal but three cases exhibited impaired mental and/or motor development, and three others had ...
Fujioka M - - 1994
We report specific changes bilaterally in the basal ganglia and thalamus following reperfusion after complete cerebral ischaemia. A 69-year-old man, resuscitated after cardiac arrest, showed symmetrical low-density lesions in the head of the caudate nucleus and lentiform nucleus on CT. MRI revealed methaemoglobin derived from minor haemorrhage in the basal ...
Häussinger D - - 1994
BACKGROUND/AIMS: Recent in vivo studies using proton magnetic resonance (1H-MR) spectroscopy showed low levels of myo-inositol in the brain in hepatic encephalopathy; the pathogenetic relevance of this observation is unclear. METHODS: Myo-inositol and glutamine levels in the brain were studied in vivo by 1H-MR spectroscopy in patients with hypo-osmolarity and ...
Unger E - - 1994
PURPOSE: To explain the hypointensity in the basal ganglia on T2-weighted magnetic resonance (MR) images of brains of toluene abusers. MATERIALS AND METHODS: Eight patients with histories of toluene abuse underwent MR imaging. A bilayered model of dipalmitoylphosphatidylcholine (DPPC; 100 mmol/L concentration) and varying concentrations of toluene was formed. The ...
Norton N S - - 1994
Hyperintensity in the basal ganglia of patients with serious liver disease is a common finding on T1-weighted magnetic resonance images. In this study, we used optical densitometry to quantitatively evaluate the hyperintense magnetic resonance image signal changes in the various regions of the brain of patients with chronic hepatic encephalopathy. ...
Imamura A - - 1994
Although marked atrophy of the tegmentum of the mid-brain is a known computed tomography (CT) and magnetic resonance imaging (MRI) feature in patients with dentato-ruburo-pallido-luysian atrophy (DRPLA), this is the first report of marked high signal intensity of the globus pallidus on proton and T2-weighted MR images in a patient ...
Fujioka M - - 1994
BACKGROUND AND PURPOSE: Very few reports are available on serial changes in human brain after cardiac arrest. The primary objective of this study is to investigate sequential neuroradiological changes in patients remaining in a persistent vegetative state following resuscitation after cardiac arrest. METHODS: We repeatedly studied eight vegetative patients resuscitated ...
Imamura A - - 1994
Dentatorubral and pallidoluysian atrophy (DRPLA) is an autosomal dominant neurodegenerative disorder. An expanded CAG trinucleotide repeat sequence motif in a gene on the short arm of chromosome 12 has recently been identified in patients with DRPLA. Juvenile-type DRPLA is characterized by childhood onset and progressive myoclonic epilepsy (PME). According to ...
Brismar J - - 1994
PURPOSE: To present the CT and MR findings in children with propionic and methylmalonic acidemia. METHODS: Twenty-three new patients with methylmalonic and 20 with propionic acidemia were examined with CT and/or MR of the brain. In total 52 CT and 55 MR studies were done. Twenty-six previously published cases were ...
Jones J S - - 1994
Selective necrosis and degeneration of the globus pallidus are characteristic autopsy findings in patients with severe carbon monoxide (CO) poisoning. The objective of this study was to show that computed tomography (CT) may demonstrate these morphological changes in the brain during life, and provide a clue to prognosis. The authors ...
Kimura S - - 1994
A 7-year-old boy had symmetrical transient high signal lesions in the external capsules on T2-weighted image during the recovery phase of herpes simplex virus (HSV) encephalitis. Although this finding has never been reported in HSV or other viral encephalitis, a postinfectious allergic mechanism is suspected in this patient. With the ...
Piliero P J - - 1994
We describe a well-documented case of Eastern equine encephalitis (EEE) in a patient who presented with fever and altered mental status and who had focal cranial lesions that were evident on both computed tomography (CT) and magnetic resonance imaging. Only 15 CT scans performed for patients with EEE have been ...
Chi C S - - 1994
A 6-month-old female infant was diagnosed with Leigh syndrome after an abnormal muscle specimen was obtained and after magnetic resonance imaging demonstrated characteristic cranial lesions. She presented with episodic hyperventilation, myoclonus, ophthalmoplegia, hypotonia, and elevation of lactate in the cerebrospinal fluid and blood. A series of cranial ultrasounds revealed progressive ...
Hahn J S - - 1994
A 4-year-old girl with status epilepticus and severe encephalopathy associated with cat-scratch disease is described. She had prolonged seizures lasting more than 2 weeks and required treatment with pentobarbital coma. She developed unusual abnormalities on magnetic resonance imaging scans that involved the thalami and the cortex of the temporal, parietal, ...
Nicolai A - - 1994
We describe the combination of acute bilateral ballism and anterior opercular syndrome in a 75-year-old female hypertensive patient with bilateral multiple small infarcts involving the basal ganglia, the subcortical white matter and the area of the subthalamic nucleus, detected by CT scan and MRI. These clinical manifestations were accompanied by ...
Sabatino G - - 1994
The authors report a case of a newborn with severe encephalopathy and cerebral calcifications. The newborn was admitted to Neonatal Intensive Care Unit in Chieti at 2 days of age suffering from continuous generalized seizures. He was the child of healthy first-degree cousins. Cerebral ultrasonography showed bilateral ventricular dilatation and ...
Leutner C - - 1994
PURPOSE: To evaluate MR patterns in ophthalmoplegia plus and correlate them with clinical symptoms. METHODS: MR was performed on a 1.5-T whole-body scanner with T2-weighted gradient-echo and spin-echo images. The retrospective analysis included 19 patients with clinically established diagnoses of ophthalmoplegia plus. RESULTS: Two types of cerebral MR abnormalities were ...
Fujita K - - 1994
A 3-year-old girl with left hemiparesis suffered from bilateral paresis, motor rigidity, gait disturbance, axial hypotonia, dysarthria, apathy, and incontinence. After steroid therapy, mild improvement occurred, but muscle weakness, gait disturbance, and rigidity remained. Leigh encephalopathy was excluded on the basis of muscle biopsy and laboratory findings. Computed tomography and ...
Lee M L - - 1994
We studied a 5-year-old boy with mitochondrial myopathy, encephalopathy, lactic acidosis and strokelike episodes that are characteristic of the MELAS syndrome. Results of biochemical, histopathological, and molecular genetic studies from the patient's tissue meet the criteria for diagnosis of mitochondrial disease. An A to G transition at the 3243th nucleotide ...
Doraiswamy P M - - 1994
A 37-year-old woman developed Wernicke encephalopathy after prolonged psychogenic food refusal. MR revealed characteristic signal abnormalities in the midbrain and dorsal thalamus. Follow-up scans showed atrophy and third ventricular enlargement. Wernicke encephalopathy can occur in nonalcoholics, and MR imaging is useful in both the diagnosis and follow-up.
Weingarten K - - 1994
OBJECTIVE: The purpose of this study was to investigate the findings on spin-echo and gradient-echo MR images obtained in patients with hypertensive encephalopathy. SUBJECTS AND METHODS: The MR images of 36 patients with clinically documented acute (< 72 hr) hypertensive encephalopathy were prospectively examined. Brain swelling on short TR images, ...
Barboriak D P - - 1994
OBJECTIVE: Creutzfeldt-Jakob disease is a rare dementing illness that usually affects older adults. Currently, neuroradiologic examinations play a minor role in the diagnosis of Creutzfeldt-Jakob disease. Several single case reports have noted a distinctive finding of hyperintense signal abnormalities in the basal ganglia on T2-weighted MR images of patients with ...
Tajima Y - - 1994
A 37-year-old man developed encephalopathy with prominent eosinophilia. Magnetic resonance imaging (MRI) revealed multiple T2-weighted high signal intensity lesions with dimeglumine gadopentetate (Gd-DTPA) enhancement on T1-weighted images, which were distributed in the cerebral cortex, thalamus, deep white matter and cerebellum. He was diagnosed as having systemic mastocytosis on the basis ...
Ibanez H E - - 1994
BACKGROUND: Vogt-Koyanagi-Harada Syndrome (VKHS) is a systemic disorder consisting of bilateral panuveitis with associated cutaneous and neurologic findings. In the absence of extraocular manifestations, diagnosis of VKHS may be difficult. METHODS: The results of magnetic resonance imaging (MRI) in two patients with VKHS and of computed tomography (CT) in a ...
Ohkoshi N - - 1994
The case of an 18-year-old woman with Wernicke's encephalopathy induced by hyperemesis gravidarum is reported. She had severe vomiting and received antiemetic therapy and intravenous administration of glucose and low-dose insulin solution without thiamine. She developed coma, nystagmus, ataxia and polyneuropathy. CT and MR imaging showed bilateral caudate lesions as ...
Shogry M E - - 1994
We report a case of Wernicke encephalopathy in which the only sign of acute disease was enhancement of the mamillary bodies. This case demonstrates the utility of gadolinium enhancement at MR imaging as a means of diagnosing or confirming the syndrome of Wernicke encephalopathy even in the absence of atrophy ...
Mizuguchi M - - 1994
We report a girl who exhibited a slowly progressive extrapyramidal disorder with onset in early infancy. CT examinations demonstrated progressive atrophy of the cerebrum. At the age of 6 years, acute exacerbation occurred with impairment of consciousness and autonomic functions. During the acute episode, CT revealed lesions in the bilateral ...
Herrold J M - - 1994
We describe a rare case of multifocal varicella-zoster leukoencephalitis in an immunosuppressed adolescent boy who developed a herpetiform rash on his groin and subsequently presented with a subacute encephalopathy, aphasia, and hemiparesis. Magnetic resonance imaging scan of the brain revealed multifocal bi-hemispheric target-like lesions predominantly in the white matter. A ...
Tartaro A - - 1993
Two cases of Creutzfeldt-Jakob Disease (CJD) are reported. In both cases, pathologically confirmed, magnetic resonance imaging (MRI) showed bilateral altered signal areas in the basal ganglia, early in the course of the disease. The CT scan, although performed later than MRI, confirmed these findings. Only in one patient did electroencephalography ...
Ide H - - 1993
Serial measurements of somatosensory-evoked potentials (SEPs) and magnetic resonance imaging (MRI) were performed in 17 cats for 24 h after unilateral middle cerebral artery occlusion. Intravoxel incoherent motion (IVIM) imaging demonstrated ischemic cerebral injury 2 h post-occlusion in all cats, while T2-weighted imaging failed to show clear evidence of injury ...
Nikkinen P - - 1993
Phantom measurements were performed with a conventional single-head single-photon emission tomography (SPET) camera in order to validate the relevance of the basal ganglia/frontal cortex iodine-123 iodobenzamide (IBZM) uptake ratios measured in patients. Inside a cylindrical phantom (diameter 22 cm), two cylinders with a diameter of 3.3 cm were inserted. The ...
Takano T - - 1993
Serial changes of MRI scanning of an 11-year-old boy with hemiparesis due to a germ cell tumor in the basal ganglia are presented. Initial brain MRI T1-weighted images revealed a subtle mixed signal intensity lesion at left anterior and posterior limbs of the internal capsule. This lesion was not enhanced ...
Fève A P - - 1993
Four subjects aged between 29 and 60 years were examined because of axial motor impairment after hypoxic brain injury. Magnetic resonance imaging revealed circumscribed lesions of the globus pallidus in every case. The association of freezing of the gait, speech disorders, axial bradykinesia, and postural disturbances, with no rigidity or ...
Ma T - - 1993
Neurological endemic cretinism, resulting from severe iodine deficiency, is characterized by mental deficiency, deafmutism, and a spastic-rigid motor disorder. Its neuropathology and pathophysiology have been investigated very little. We report the clinical and magnetic resonance imaging brain scan findings of 3 adult Chinese cretins. All show an apparent magnetic resonance ...
Nelson K - - 1993
The use of magnetic resonance imaging (MRI) provides visual evidence of cerebral deposits of paramagnetic metals. The usefulness of MRI is described in connection with the manganese poisoning of a 44 year old arc welder who had been engaged in the repair and recycling of railroad track made of manganese ...
Fourestie V - - 1993
The clinical features, brain computerized tomography (CT) scans and cardiological findings of nine patients with neurotrichinosis are reviewed. Neurological signs consisted of encephalopathy and focal deficits with small hypodensities in the cortex and white matter, detected by the CT scans. Various cardiovascular events were also observed in eight out of ...
Ho V B - - 1993
Computed tomography (CT) and magnetic resonance (MR) imaging have dramatically improved the ability to visualize the deep gray structures of the basal ganglia (primarily, the caudate nucleus, putamen, and globus pallidus). Any process that alters cerebral metabolism can lead to basal ganglia damage. This article presents the spectrum of disease ...
Chen W H - - 1993
A 30-year-old woman developed a sudden onset of stuttering in the early stage of Japanese B encephalitis. Cranial CT scan, EEG and electrodiagnostic studies revealed no definite focal abnormality. Her stuttering persisted for 1 week and subsided spontaneously. Stuttering can be a rare early manifestation in Japanese B encephalitis.
Marra T R - - 1993
Striking reversible signal intense magnetic resonance imaging (MRI) lesions were observed in the occipital cortex of a 16-year-old girl who presented with an attack of transient cortical blindness as the initial manifestation of hypertensive encephalopathy (HTE). The lesions were seen to best advantage on T2-weighted imaging and were not visible ...
Callender T J - - 1993
Thirty-three workers, ages 24 to 63, developed clinical toxic encephalopathy after exposure to neurotoxins and were studied by SPECT brain scans. Five were exposed to pesticides, 13 were acutely exposed to mixtures of solvents, 8 were chronically exposed to mixtures of hazardous wastes that contained organic solvents, 2 were acutely ...
Green J P - - 1993
Selective downgaze paralysis was correlated with discrete bilateral lesions at the mesencephalic-diencephalic junction in a 9-year-old girl following severe pneumococcal meningitis, and in a 64-year-old man who suffered an embolic infarction. Magnetic resonance imaging demonstrated bilateral lesions in the region of the rostral interstitial nucleus of the medial longitudinal fasciculus. ...
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