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  • 1
    Electronic Resource
    Electronic Resource
    Oxygen chemisorption on Cu(110): A combined study by second-harmonic spectroscopy and photoemission (1995)
    Springer
    Applied physics 60 (1995), S. 173-178 
    Details
    ISSN: 1432-0630
    Keywords: 42.65.-k ; 73.20-r ; 79.60.-i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have studied the formation of the addedrow (2×1)O overlayer on Cu(110) using Second-Harmonic Generation (SHG). To characterize the electronic properties of the surface, simultaneous observations with LEED and angle-resolved photoemission were performed. We are able to interpret our results in terms of transitions between surface bands of Cu(110) and Cu(110)-(2×1)O, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01538243
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    CSF pulsation patterns in occlusive hydrocephalus (1994)
    Springer
    European radiology 4 (1994), S. 133-141 
    Details
    ISSN: 1432-1084
    Keywords: CSF flow ; Hydrocephalus ; MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Fifteen patients with solid and cystic occlusions of the cerebrospinal fluid (CSF) circulation pathways were examined with MRI using an ECG retrogated two-dimensional FISP sequence to determine whether there are certain defined pathological CSF flow patterns in these patients. All patients were clinically still compensated. The results of the measurements of CSF flow velocities at different locations in the CSF system were compared with the results from 8 healthy volunteers. In all patients with occlusive processes of the intraventricular CSF pathways (4 aqueduct stenoses, 1 membranous occlusion of the fourth ventricular outlets, 1 solid tumour at the foramen of Monro and 1 solid fourth ventricular tumour) we observed hyperdynamic CSF pulsation above the lesion. This was transmitted into the spinal canal. Close by a solid occlusion within the aqueduct the flow velocity curve over the RR cycle was typically shifted, resulting in a mirroring of the flow velocity curve compared with normals. In cystic lesions (n = 4) there was transmission of the pulsation wave through the lesion and therefore no mirroring of the flow velocity curve. This technique allows very good delineation of cystic structures in the peripineal region (n = 4), also due to the opposite direction of flow within the cyst compared with the surrounding CSF spaces, depending on the extent of communication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231199
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    MR imaging and MR angiography in preoperative evaluation of intracranial meningiomas (1994)
    Springer
    European radiology 4 (1994), S. 538-544 
    Details
    ISSN: 1432-1084
    Keywords: MRI ; MRA ; Meningiomas ; Arterial displacement ; Tumor-feeding vessels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A group of 41 patients with intracranial meningiomas were examined by MR imaging (MRI) and MR angiography (MRA) to assess the. clinical value of MRA in the preoperative evaluation of these patients. The results of MRA were compared with the results of intraarterial cerebral catheter X-ray angiography (XRA; n = 19) and with the operative findings (n = 41 ): Our results showed a good correlation between MRA and XRA/surgery in demonstrating the relationship between the tumor and adjacent venous and arterial structures. Use of MRA was also helpful in demonstrating the degree of intrinsic tumor vascularity. It also supplied important information for operative planning Adjunct XRA was mandatory if detailed information about tumor-feeding vessels was requested by the neurosurgeon, especially in highly vascularized angiomatous meningiomas and in meningiomas suspected of tumor feeding by vessels of the internal carotid artery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226826
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    Paper (German National Licenses)
    Fulltext
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