Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    An approach to stereotaxic radiography (1980)
    Springer
    Acta neurochirurgica 54 (1980), S. 157-165 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A simple approach to stereotaxic radiography, including a new method for determination of target coordinates, is described. The proposed technique may be used in combination with conventional equipment for roentgen eximinations available in X-ray departments and operating rooms; the only additional outfit needed is a coordinate frame that can be attached to the patient's head. Determination of the coordinates is easily made graphically, or from a simple equation using a pocket calculator or a mini-computer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01407082
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Head fixation system for integration of radiodiagnostic and therapeutic procedures (1980)
    Springer
    Neuroradiology 19 (1980), S. 1-6 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography, head ; Stereotaxic techniques ; Head fixation system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A head fixation system is described enabling exact transfer of positions between neuroradiological and therapeutic procedures. The key item of the system is a base plate that is rigidly attached to the patient's head, either by a plastic mould or screws onto the calvarium. The base plate may easily and accurately be attached to diagnostic or therapeutic units. Coordinates of target points in the various units are directly related through the exact application of the base plate. Procedures for the exact comparison of spatial information have been worked out. The system has been used for diagnostic procedures such as plain skull radiography, cerebral angiography, CT scanning, positron emission tomography, and gamma camera examinations, as well as for therapeutic procedures such as stereotaxic biopsy and radiation treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369080
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Attenuation profiles of the petrous bone with acoustic neuroma (1980)
    Springer
    Neuroradiology 19 (1980), S. 123-129 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Acoustic neuroma ; Internal auditory meatus ; Attenuation profiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Attenuation profiles across the petrous bone covering the whole internal auditory meatus (IAM) were constructed from the printouts obtained by computed tomography (CT) with narrow collimation performed on 12 patients with 13 acoustic neuromas. In healthy patients the attenuation profiles of right and left petrous bone were very similar in shape. The attenuation values of the individual pixels in the pixel columns of the printout located at the site of the porus and the IAM reflected the demineralization of the petrous bone and the widening of the porus and the IAM caused by the acoustic neuroma. A widening deep in the meatus was demonstrated in a patient with an intracanalicular tumor, and therefore it seems possible to make this diagnosis by CT scanning combined with the construction of attenuation profiles across the petrous bone. In the presence of unilateral acoustic neuroma there was a significant and characteristic difference in shape between the attenuation profiles of the two sides with generally lower attenuation values on the tumor side together with signs of widening of the porus and the IAM. In cases of bilateral acoustic neuroma comparison of the attenuation profiles can be made with mean attenuation curves obtained from scanning normal petrous bones. The prevailing physical limitations for demonstrating a narrow bony canal like the IAM with CT was experimentally analyzed using bone-simulating plastic material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00342386
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    A critical evaluation of two methods of head fixation (1980)
    Springer
    Neuroradiology 19 (1980), S. 7-12 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Stereotactic techniques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two head-fixation systems, one using Thermoplast and the other Lightcast were tested as to reproducibility by comparing stereotactic coordinates before and after CT scan and after removal and reapplication of the helmets. Helmets constructed of Lightcast were more consistently stable than those constructed of Thermoplast probably due in part to the dental fixation used with the former. With Lightcast the change in position of coordinates was consistently less than 3 mm, i.e. 2 pixels, which is within the tolerance of the system as a whole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00369081
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...