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  • 1
    Electronic Resource
    Electronic Resource
    Diagnosis of sellar and parasellar lesions by computed tomography (1979)
    Springer
    Neuroradiology 18 (1979), S. 249-258 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography, head ; Pituitary gland, neoplasms ; Sella turcica, anatomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Suspected lesions in and around the sella were examined by CT in 129 cases. The diagnostic accuracy and various technical aspects of the method are described. The mean attenuation and enhancement after administration of contrast material are evaluated in craniopharyngiomas, chromophobe adenomas, meningiomas, aneurysms, dermoid cysts, an arachnoid cyst and a glioma. The choice of collimator and its use in relation to sellar dimensions, particularly the sellar depths, are emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327688
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Early contrast enhancement of acoustic neuroma (1978)
    Springer
    Neuroradiology 17 (1978), S. 31-33 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Contrast medium enhancement ; Acoustic neuroma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The changes of the enhancement of the lesion with time after intravenous administration of contrast medium were measured with computed tomography (CT) in 23 cases of acoustic neuroma. The pattern of high initial enhancement followed by a fairly rapid decrease is confirmed. A more rigorous study of the enhancement pattern using a mathematical description of the enhancement curve of the tumor as well as a measurement of the individual blood enhancement curve is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345267
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A ring detector positron camera system: Its merits; Clinical experience (1978)
    Springer
    Neuroradiology 16 (1978), S. 572-574 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A ring detector positron camera system for CT of the brain is described. The system uses 95 NaI (Tl) detectors, arranged with cylindrical geometry, for the simultaneous detection of coincidences from 1900 detector combinations. With a new sampling technique an experimental system resolution of 7 mm FWHM has been obtained. The sensitivity was found to be 5300 c/s with a 100-keV energy threshold and using a 19.2-cm-diameter cylindrical phantom with a homogeneous specific activity of 1 μCi/cm3. A clinical study of blood-brain barrier damage using 68Ga-EDTA is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395365
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The limitations of definition of blood vessels with computer intravenous angiography (1976)
    Springer
    Neuroradiology 11 (1976), S. 35-40 
    Details
    ISSN: 1432-1920
    Keywords: Intravenous angiography ; Computerized axial tomography ; Limitations contrast enhancement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Using a polystyrene phantom and various concentrations of iodine contrast material, the discrimination of blood vessels by the EMI scanner was studied. Although a 2 mm tube can be delineated using high concentrations of iodine, smaller tubes are not seen due to noise inherent in the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00327256
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  • 5
    Electronic Resource
    Electronic Resource
    Attenuation values of the cerebrospinal fluid (CSF) (1978)
    Springer
    Neuroradiology 15 (1978), S. 165-166 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Cerebrospinal fluid ; Attenuation value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The attenuation value of CSF, obtained by lumbar puncture, was determined with computed tomography in 25 patients. Measurement of the protein content in the same samples showed no correlation with the attenuation value. It is concluded that in the normal range of protein concentrations, the effect on the attenuation is insignificant and that the attenuation value of the CSF might be used to check large deviations in the CT numbers due to artifacts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329061
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  • 6
    Electronic Resource
    Electronic Resource
    Attenuation changes of the ventricular CSF after intravenous injection of contrast material (1978)
    Springer
    Neuroradiology 15 (1978), S. 167-170 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography, brain ; Contrast material ; Cerebrospinal fluid ; Cerebral ventricles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The CT attenuation change of the intraventricular CSF after i. v. administration of contrast material has been studied in 20 patients. A very small increase of attenuation was observed in the entire material. The method does not seem to be appropriate at present for the study of small attenuation changes in the CSF reflecting the passage of contrast material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329062
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Titanium clips in neurosurgery for elimination of artefacts in computer tomography (CT) (1977)
    Springer
    Acta neurochirurgica 38 (1977), S. 101-109 
    Details
    ISSN: 0942-0940
    Keywords: Computer tomography ; titanium clips ; artefacts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To eliminate the occurrence of artefacts produced by clips on the CT images, the use of titanium clips is suggested. Testsin vitro andin vivo indicate that clips manufactured from 0.2 mm thick 99.9 per cent titanium do not cause artefacts. They are resistant to corrosion, nontoxic, effective, easy to handle, relatively cheap, and are visible on plain X-ray films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01401546
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Co-existing coupling schemes at high spin in Hf (2000)
    Springer
    The European physical journal 8 (2000), S. 165-176 
    Details
    ISSN: 1434-601X
    Keywords: PACS 21.10.-k Properties of nuclei; nuclear energy levels – 23.20.Lv Gamma transitions and level energies – 25.70.-z Low and intermediate energy heavy-ion reactions – 27.70.+q 150≤A≤189
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The nucleus 166Hf has been populated by the reaction 96Zr(74Ge,4n) using a beam energy of 310 MeV. -rays were detected with the EUROBALL III detector array. Fourteen new normal-deformed rotational bands, of which six form coupled pairs, have been observed in 166Hf. Four previously known bands have been extended to considerably higher spin, and configurations of the new bands are proposed. Two different bands have been assigned configurations involving the same orbitals at high spin. The two coupling schemes, deformation and rotation alignment, are discussed in connection with this new observation, which calls for a formulation of co-existing coupling schemes in six-quasiparticle structures involving the same orbitals at high spin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050022
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  • 9
    Electronic Resource
    Electronic Resource
    Study of 169Hf at high rotational frequency (2001)
    Springer
    The European physical journal 12 (2001), S. 15-28 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 21.10.-k Properties of nuclei; nuclear energy levels – 23.20.Lv Gamma transitions and level energies – 25.70.-z Low and intermediate energy heavy-ion reactions – 27.70.+q 150 ?A? 189
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. High-spin properties of the nucleus 169Hf have been studied through the fusion evaporation reaction 96Zr(76Ge,3n)169Hf at a beam energy of 310 MeV. The known rotational bands have been extended considerably and 6 new bands have been established, four of which form coupled bands with pronounced M1 connections. Quasiparticle assignments are suggested for the new band structures, and it appears that coupling to vibrational degrees of freedom plays a role. Both coupled bands involve the excitation of quasiprotons. In the region of highest spin, a large alignment gain is interpreted in terms of a mixed crossing where an h 9/2 and an h 11/2 quasiproton provide the two signatures of the aligning configuration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500170035
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  • 10
    Electronic Resource
    Electronic Resource
    Evaluation of the effect of high-energy proton irradiation treatment on meningiomas by means of 11C-L-methionine PET (2000)
    Springer
    European journal of nuclear medicine 27 (2000), S. 1793-1799 
    Details
    ISSN: 1619-7089
    Keywords: Meningioma 11C-L-methionine Positron emission tomography Stereotactic irradiation Proton beam therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. A remnant meningioma of WHO grade I that is located at the base of the skull and is treated with radiotherapy has to be followed up for at least 5–10 years to evaluate the treatment effect and detect recurrence. The tumour has to grow considerably to show detectable volume increase on computed tomography (CT) or magnetic resonance imaging (MRI). Owing to the location at the base of the skull, a small increase in tumour volume may be hazardous. It is thus important to find a method to evaluate treatment effects earlier and potentially detect those tumours that have a tendency to grow. Nineteen patients with intracranial meningiomas were given irradiation with the 180-MeV proton beam at the Svedberg Laboratory, Uppsala, Sweden. The fractionation schedule used was in general a total dose of 24 Gy in four consecutive daily 6-Gy fractions. Serial 11C-L-methionine PET examinations were used to evaluate the effect of stereotactic proton beam treatment. The radioactivity uptake in the tumour was evaluated as the ratio to the uptake in normal brain tissue. The follow-up period thus far is 36 months. In 15 of the 19 patients, 11C-L-methionine uptake was reduced 36 months after irradiation compared with the pre-treatment uptake of the tracer. In the total patient group the average reduction was 19.4%. Our results reveal that proton beam irradiation of meningiomas had an inhibitory effect on the methionine uptake in the meningiomas, although tumour size remained unchanged. The combination of unchanged tumour morphology and a reduction in methionine uptake after irradiation suggests that 11C-L-methionine PET might enable earlier evaluation of the treatment effect than is possible with CT or MRI.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002590000335
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