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Träfflista för sökning "WFRF:(Nilsson Börje) srt2:(1995-1999)"

Sökning: WFRF:(Nilsson Börje) > (1995-1999)

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1.
  • Blad, Börje, et al. (författare)
  • A simple test device for electrometers
  • 1998
  • Ingår i: Physics in Medicine and Biology. - 1361-6560. ; 43:8, s. 2385-2391
  • Tidskriftsartikel (refereegranskat)abstract
    • Electrometers used in dosimetric instruments need to be checked regularly in order to measure and maintain the prescribed dose to the patient. This paper describes the function of a simple but accurate test device for electrometers. A number of electrometers have been tested and compared with calibrations performed by the Swedish Standard Dosimetry Laboratory (SSDL). The device can be used to test current, resistance, voltage and charge measurements. The charge can be conducted to the electrometer in different ways, and the input resistance of the electrometer can also be determined. The calibration factors obtained by the device are in good agreement with results obtained from calibrations at the SSDL.
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2.
  • Blad, Börje, et al. (författare)
  • The influence of air humidity on an unsealed ionization chamber in a linear accelerator
  • 1996
  • Ingår i: Physics in Medicine and Biology. - : IOP Publishing. - 1361-6560 .- 0031-9155. ; 41:11, s. 2541-2548
  • Tidskriftsartikel (refereegranskat)abstract
    • The safe and accurate delivery of the prescribed absorbed dose is the central function of the dose monitoring and beam stabilization system in a medical linear accelerator. The absorbed dose delivered to the patient during radiotherapy is often monitored by a transmission ionization chamber. Therefore it is of utmost importance that the chamber behaves correctly. We have noticed that the sensitivity of an unsealed chamber in a Philips SL linear accelerator changes significantly, especially during and after the summer season. The reason for this is probably a corrosion effect of the conductive plates in the chamber due to the increased relative humidity during hot periods. We have found that the responses of the different ion chamber plates change with variations in air humidity and that they do not return to their original values when the air humidity is returned to ambient conditions.
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  • Resultat 1-2 av 2
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refereegranskat (2)
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Nilsson, Per (2)
Blad, Börje (2)
Knöös, Tommy (1)
Wendel, P (1)
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Lunds universitet (2)
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Engelska (2)
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Medicin och hälsovetenskap (2)

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