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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 242 (1995), S. 689-694 
    ISSN: 1432-1459
    Keywords: Cardiac myxoma ; Aneurysm ; Dementia ; Computed tomography ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From 1980 to 1992 we followed 12 patients with cardiac myxomas for an average of 4.4 years (8 months–11 years). Presenting symptoms were neurological in four patients (hemiparesis, aphasia, visual field deficits, progressive dementia or vertigo), progressive dyspnoea in six, pulmonary embolism in one, and peripheral arterial or renal emboli in three. The diagnosis was suspected clinically in 11 patients. It was confirmed by echocardiography in ten and by thoracic CT in one. All these patients had cardiac surgery. One diagnosis was made at autopsy; the patient died unexpectedly during surgery for emboli to the leg arteries. At follow-up, two additional patients had died, one from myocardial infarction and one from rhabdomyosarcoma. Only one of the nine surviving patients had recurrent symptoms after cardiac surgery. His dementia continued to progress. The patients without new symptoms after cardiac surgery had normal MRI of the brain or residual ischaemic lesions. MRI of the patient with progressive dementia showed multiple cerebral lesions with a bright centre and a dark rim on T1- and T2-weighted spin-echo images. On CT there were many calcified lesions. CT, MR angiography and contrast angiography revealed multiple fusiform aneurysms. The rare occurrence of progressive neurological symptoms after myxoma resection with multiple cerebral lesions and aneurysms should suggest myxoma metastases to the brain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 38 (1996), S. 395-402 
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In summary, the services provided by the Internet are extremely useful for clinical and especially research work. Considering the Internet's current rate of growth, a clinical research institution should ask itself for how long it can afford not to be present on the Internet. The excellent communications and data exchange facilities, software access, Usenet discussions and the multimedia platform offered by the World Wide Web make the Internet the ideal tool for both clinicians and researchers to stay in touch with current developments.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 39 (1997), S. 495-498 
    ISSN: 1432-1920
    Keywords: Key words Reye's syndrome ; Computed tomography ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Early MRI in a case of clinically established Reye's syndrome confirmed CT findings of compressed ventricles and additionally demonstrated signal alterations in the thalamus, mesencephalon and pons. On follow-up MRI the pontine lesion had vanished by 1 week later, while the thalamic lesion persisted for more than 2 months. The patient, however, recovered without neurological sequelae.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1920
    Keywords: Key words Stroke ; Veins, cerebral, thrombosis ; Magnetic resonance imaging, diffusion-weighted
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report a 20-year-old woman who suffered headaches before presenting with a state of fluctuating vigilance. MRI showed diffuse high signal in the basal ganglia bilaterally on diffusion- and T2-weighted images, which had areas of both low and high apparent diffusion coefficient, presumed to correspond to cytotoxic and vasogenic oedema. MR venography showed no flow in the deep cerebral veins or straight sinus. Heparin was given, with clinical recovery. On follow-up MRI, the appearances became normal.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1920
    Keywords: Key words Magnetic resonance imaging ; Echo-planar sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To assess the value of echo-planar imaging (EPI) for ultra-fast routine clinical diagnostic MRI, we compared four different EPI sequences with conventional T2-weighted spin-echo images on a commercial clinical imager. We examined 25 randomly selected patients who posed different clinical questions. The images were interpreted by two experienced neuroradiologists blinded as to the sequence used. Image quality and diagnostic certainty were evaluated and the main diagnosis established from the EPI study was compared to that obtained from the T2-weighted images. Finally, EPI- and T2-based diagnoses were compared with the diagnosis resulting from a complete MRI examination. Apart from one sequence that was generally rated low as regards both diagnostic certainty and image quality, the EPI sequences were comparable to each other, but inferior to the T2-weighted images. However, two EPI sequences gave better diagnostic results than T2-weighted images compared to the full MRI examination. Gradient-echo EPI was particularly sensitive to haemorrhagic lesions. All normal cases were correctly identified on EPI studies. Only two pathological cases were missed; both had isolated cranial nerve lesions. The absence of false-positive results and the high sensitivity to ischaemic and mass lesions mean that EPI can be used for ultra-fast screening. However, from these initial studies, EPI seems unsuitable for neuroradiological investigation of patients who may have subtle lesions whose detection requires either special sequences or administration of contrast medium. EPI can nevertheless be used in addition to high-resolution T1-weighted images and may replace T2-weighted spin-echo sequences for special indications.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 40 (1998), S. 516-518 
    ISSN: 1432-1920
    Keywords: Key words Agammaglobulinaemia ; congenital ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI in a 17-year-old boy with known congenital agammaglobulinaemia (CA) demonstrated signs of chronic leptomeningeal inflammation with thickened, enhancing meninges. Furthermore, high signal was found symmetrically on T2-weighted images in the frontal and parietal white matter. The patient presented with severe general brain dysfunction and recent cerebellar ataxia. Extensive investigation did not reveal a causal agent. This case shows that MRI can be helpful in establishing the presence of pathological changes in cases where laboratory results are negative.
    Type of Medium: Electronic Resource
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