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  • 1
    Electronic Resource
    Electronic Resource
    Myelography in the late postoperative period in patients subjected to anterior cervical decompression and fusion (1993)
    Springer
    Acta neurochirurgica 122 (1993), S. 97-101 
    Details
    ISSN: 0942-0940
    Keywords: Cervical spondylosis ; cervical disc ; Cloward procedure ; anterior fusion ; late myelography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary During a 13 year period, 286 patients with cervical disc herniation and/or spondylotic spurs, were subjected to anterior decompression and vertebral interbody fusion with autologous bone. Twenty patients were re-admitted in the late postoperative period due to recurrent radicular symptoms and/or signs of myelopathy. In these patients myelography was performed again. In 14 patients spinal cord compression and/or nerve root involvement at a new level was visualized. At the operated level, however, the myelograms demonstrated a smooth anterior wall in the spinal canal. The series confirms the safety, effectiveness and reliability of the Cloward procedure in achieving long term spinal cord and nerve root decompression, and a solid vertebral interbody fusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01446993
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    MRI in acute transverse myelopathy (1993)
    Springer
    Neuroradiology 35 (1993), S. 221-226 
    Details
    ISSN: 1432-1920
    Keywords: MRI ; Acute transverse myelopathy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The MRI examinations of seven patients with acute transverse myelopathy (ATM) were analysed. The patients were examined 2–5 times during the course of their disease with short and long TR/TE spin-echo sequences in the sagittal projection. A previous history of autoimmune disorder and/or signs of infection at the onset of ATM were present in all cases. Cerebrospinal fluid analysis showed local synthesis of immunoglobulin in the nervous system in three cases and signs of infectious myelitis in one. During the acute phase four patients had local enlargement of the cord and all had increased signal on long TR/TE sequences. The outcome was grave in the majority of patients and there seemed to be a correlation between the degree of cord enlargement, persistence of increased signal intensity and limited recovery. Atrophy and remaining high signal intensity were noted on late MRI in patients with poor outcome. In one patient with probable anterior spinal artery occlusion, cavitation of the cord was seen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588501
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    MRI of extradural spinal tumours at 0.3 T (1993)
    Springer
    Neuroradiology 35 (1993), S. 370-374 
    Details
    ISSN: 1432-1920
    Keywords: Magnetic resonance imaging ; Extradural tumours ; Spinal metastases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ninety-one patients with extradural spinal tumours were examined by magnetic resonance imaging. There were 76 metastases (6 from unknown primary tumours). Seven patients had primary spinal tumours and 8 had multiple myeloma. Sixteen had bulging, diseased vertebral bodies compressing the subarachnoid space and 67 had extradural tumour compressing the spinal cord. Sixty patients had paravertebral involvement. Intraspinal involvement did not correlate with the extent of spinal lesions. All patients had vertebral destruction, with hypointense or combined hypo- and isointense signal relative to bone marrow on T1-weighted images. In most of the 22 patients with T2-weighted images the tumours were isointense or slightly hyperintense. It was usually impossible to differentiate the various tumours on the basis of signal intensity and morphology. However, metastases from carcinoma of the prostate were often more hypointense than other tumours on T1- and T2-weighted images. An inhomogeneous pattern in which diffusely low signal is combined with focal lower signal on T1-weighted images may suggest myeloma. In the 22 patients examined with both T1- and T2-weighted images, T1-weighted images gave the best information in 18; in 3 they were equivalent and in 1 inferior to T2-weighted images; they are therefore recommended for routine imaging of epidural spinal tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588373
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Aortic pathology revealed by MRI in patients with clinical suspicion of spinal disease (1993)
    Springer
    Neuroradiology 35 (1993), S. 499-502 
    Details
    ISSN: 1432-1920
    Keywords: Magnetic resonance imaging ; Spine ; Aortic disease ; Aortic aneurysm ; Aortic dissection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In five patients with clinical suspicion of spinal disease, MRI of the spine revealed unexpected aortic pathology explaining the symptoms. No significant intraspinal pathology was found on MRI. However, in one patient with clinical suspicion of spinal stenosis, an aortic occlusion was detected on MR images of the spine. The lower extremity ischaemia, caused by the occlusion, was responsible for the symptoms. In another patient a paravertebral haematoma from a ruptured aortic aneurysm resulted in spinal nerve compression, thought before MRI to be caused by a spinal tumour. In three patients aortic aneurysm or dissection resulted in spinal cord ischaemia with symptoms mimicking those of compressive spinal disease. Thus, if MRI of the spine does not provide an explanation for the patient's symptoms, examination of the aorta is recommended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588705
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  • 5
    Electronic Resource
    Electronic Resource
    Radiological investigation of neurofibromatosis type 2 (1994)
    Springer
    Neuroradiology 36 (1994), S. 107-110 
    Details
    ISSN: 1432-1920
    Keywords: Neurofibromatosis ; NF2 ; Meningioma, multiple ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The radiological findings in six patients fulfilling the criteria of neurofibromatosis type 2 (NF2) were reviewed. Subtle cutaneous lesions were found in three. All patients had bilateral acoustic schwannomas; two had small acoustic tumours and normal hearing. In these patients the presenting symptoms were caused by multiple intracranial meningiomas and spinal neurofibromas, respectively, whereas the remaining four patients presented with hearing loss. Two patients had other cranial nerve tumours. Three patients had rapidly growing multiple intracranial meningiomas; two had multiple spinal neurofibromas and one a spinal meningioma. NF2 is a rare disease with few cutaneous but frequent, typical radiological findings in the central nervous system. The presenting symptom is most commonly hearing loss due to acoustic schwannomas, although symptoms emanating from other intracranial or tumours are not uncommon. The discovery of multiple meningiomas or multiple spinal neurofibromas without cutaneous lesions should initiate a search for acoustic schwannomas even when the patient has normal hearing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588071
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Optimizing conventional cardiac MRI in the rabbit at 0.3 T (1993)
    Springer
    Pediatric radiology 23 (1993), S. 439-441 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this study was to define the most efficient way of performing cardiac MRI for anatomic information in small experimental animals, using a vertical magnetic field with a strength of 0.3 T (FONAR beta-3000M). This information may be used to improve cardiac MRI in infants and small children, since the size of a rabbit is considered comparable to that of a neonate. Experimental axial cardiac MRI studies were performed in a rabbit under general anesthesia in order to study the effects on image quality of changing various imaging parameters. These are ECG-gating, number of excitations (averages), number of warp levels, echo time (TE) and repetition time (TR). The effects of changing the size of the field of view (FOV), the slice thickness and the phase-encoding direction were also studied. We found that ECG-gating was crucial and that three excitations, TE 16 ms, and 257 vertical phase-encoding warp levels were adequate. Five-millimeter slice thickness and FOV 20 cm were preferred.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02012443
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