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  • 1
    Digitale Medien
    Digitale Medien
    Technical factors in MR image quality (1986)
    Springer
    Neuroradiology 28 (1986), S. 74-77 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Head ; MRI ; Image quality
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary We studied the subjective rating of MR image quality as field strength, slice thickness, number of acquisitions and matrix size were varied. Matrix and number of acquisitions had the most significant effect on image quality. Therefore, in comparisons of image quality, technique must not be disregarded.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00341772
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  • 2
    Digitale Medien
    Digitale Medien
    Gradient recalled echo MR imaging of superior sagittal sinus occlusion (1989)
    Springer
    Neuroradiology 31 (1989), S. 134-136 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Gradient recalled echo ; MRI ; Sinus occlusion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary With T1-weighted gradient recalled echo (GRE) MR images and flow compensation, we studied the superior sagittal sinus in 3 normal volunteers and 3 patients with sinus occlusion. In these images, sites of patency of the superior sagittal sinus were identified due to the high signal intensity of the normal sinus. Tumor invading the sinus was nearly isointense with cerebral gray matter. T1-weighted GRE imaging proves to be an effective technique to evaluate sinus blood flow.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00698840
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  • 3
    Digitale Medien
    Digitale Medien
    Monocyte recruitment into the scrapie-affected brain (1995)
    Springer
    Acta neuropathologica 90 (1995), S. 164-169 
    Details
    ISSN: 1432-0533
    Schlagwort(e): Key words Monocyte ; Scrapie ; Central nervous ; system ; Pathogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The recruitment of monocytes into the scrapie-affected brain was investigated in female mice reconstituted with male bone marrow, using a Y-chromosome-specific probe and F4/80 immunocytochemistry. Recruitment of monocytes could be demonstrated in six out of eight animals and the number of recruited cells correlated with the severity of vacuolation in most, but not all, animals. The proportion of microglia derived from recruited monocytes varied between individual animals, did not correlate with the increase in cellularity (glia) in affected areas of brain and did not affect the length of incubation period. Thus, it is unlikely that the recruitment of monocytes is a pivotal event in the development of early pathological changes in scrapie. The morphology of recruited cells in scrapie lesions, as revealed by F4/80 immunoreactivity, was indistinguishable from that of activated resident microglia.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00294316
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  • 4
    Digitale Medien
    Digitale Medien
    Monocyte recruitment into the scrapie-affected brain (1995)
    Springer
    Acta neuropathologica 90 (1995), S. 164-169 
    Details
    ISSN: 1432-0533
    Schlagwort(e): Monocyte ; Scrapie ; Central nervous system ; Pathogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The recruitment of monocytes into the scrapie-affected brain was investigated in female mice reconstituted with male bone marrow, using a Y-chromosome-specific probe and F4/80 immunocytochemistry. Recruitment of monocytes could be demonstrated in six out of eight animals and the number of recruited cells correlated with the severity of vacuolation in most, but not all, animals. The proportion of microglia derived from recruited monocytes varied between individual animals, did not correlate with the increase in cellularity (glia) in affected areas of brain and did not affect the length of incubation period. Thus, it is unlikely that the recruitment of monocytes is a pivotal event in the development of early pathological changes in scrapie. The morphology of recruited cells in scrapie lesions, as revealed by F4/80 immunoreactivity, was indistinguishable from that of activated resident microglia.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00294316
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  • 5
    Digitale Medien
    Digitale Medien
    T1, T2 and proton density measurements in the grading of cerebral gliomas (1993)
    Springer
    European radiology 3 (1993), S. 49-52 
    Details
    ISSN: 1432-1084
    Schlagwort(e): Brain tumor ; MRI ; T1 ; T2
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The possibility that cerebral tumours may be graded by measuring T1 or T2 with magnetic resonance (MR) imaging was studied. A consecutive series of patients with subsequently verified gliomas was enrolled, and studied with MR. Patients who had prior surgical, chemotherapeutic or steroid treatment were excluded. Single slice multiple saturation recovery and multiple spin echo techniques were used to measure T1, T2 and proton density in the tumour. In 33 patients with cerebral gliomas there were 5 grade I, 12 grade II, 7 grade III and 9 grade IV. T1 and T2 values tended to be smaller in grade I gliomas than in grades II, III and IV gliomas. Relaxation parameters overlapped considerably in tumours with different grades. Proton density values did not show much change between different grades of gliomas. Relaxation parameters cannot be used to determine tumour grade reliably.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00173524
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  • 6
    Digitale Medien
    Digitale Medien
    Movement patterns of riverine litter (1997)
    Springer
    Water, air & soil pollution 98 (1997), S. 119-139 
    Details
    ISSN: 1573-2932
    Schlagwort(e): litter clearance and accumulation ; riverine litter ; time of travel
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Aspects of litter movement were looked at in a variety of ways. River bank clearances provided valuable information on litter accumulation and movement, showing a distinctive correlation between flood events and litter movement. Introduction of litter outside of channel deposition (diffuse sources) were limited in the study area in South Wales, UK. A rise in litter deposition occurred for some time after flood events, with the main accumulation occurring in the mid-bank zone. As only some litter types have an increased input during flood events e.g. sewage-derived material from combined sewer outfalls (CSO), accumulation of other litter types, e.g. plastic sheeting could be due to their distribution throughout the catchment. A positive correlation between litter stranding and vegetation was found. During high flows, (75.59 cumecs) litter is removed from sites with little restraining vegetation and deposited where stranding potential is high. Smaller items such as feminine hygiene products were more susceptible to stranding than larger plastic sheeting.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02128653
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  • 7
    Digitale Medien
    Digitale Medien
    Sources of Riverine Litter: The River Taff, South Wales, UK (1999)
    Springer
    Water, air & soil pollution 112 (1999), S. 197-216 
    Details
    ISSN: 1573-2932
    Schlagwort(e): fly tipping ; riverine litter ; sewage ; sources
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Riverine litter occupies a spatial and temporal position in any systematic analysis of river systems and is a problem that is increasing in scale. Quantifiable source factors of litter in the river Taff, South Wales, UK, system were found to be mainly two – sewage inputs through combined sewer overflows (CSO) and fly tipping. The greatest inputs of sewage derived solids were introduced to the river by malfunctioning CSO, the most numerous single component being sanitary towels. Whilst sewage-derived material constituted approximately 23% of all items on the river Taff, large quantities of waste, especially plastic sheeting, originated from fly tipping sites.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1005000724803
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  • 8
    Digitale Medien
    Digitale Medien
    MOVEMENT PATTERNS OF RIVERINE LITTER (1997)
    Springer
    Water, air & soil pollution 98 (1997), S. 119-139 
    Details
    ISSN: 1573-2932
    Schlagwort(e): litter clearance and accumulation ; riverine litter ; time of travel
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract Aspects of litter movement were looked at in a variety of ways. River bank clearances provided valuable information on litter accumulation and movement, showing a distinctive correlation between flood events and litter movement. Introduction of litter outside of channel deposition (diffuse sources) were limited in the study area in South Wales, UK. A rise in litter deposition occurred for some time after flood events, with the main accumulation occurring in the mid-bank zone. As only some litter types have an increased input during flood events e.g. sewage-derived material from combined sewer outfalls (CSO), accumulation of other litter types, e.g. plastic sheeting could be due to their distribution throughout the catchment. A positive correlation between litter stranding and vegetation was found. During high flows, (75.59 cumecs) litter is removed from sites with little restraining vegetation and deposited where stranding potential is high. Smaller items such as feminine hygiene products were more susceptible to stranding than larger plastic sheeting.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1026424715108
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