PMID: 9664274Jul 17, 1998Paper

Energy dependence of a new solid state diode for low energy photon beam dosimetry

Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists
C B SawD H Hussey

Abstract

Any newly introduced radiation dosimeters must be evaluated for clinical use. This paper reports an evaluation of the energy response of a newly fabricated solid state diode for low-energy photon beam dosimetry. The diode, which has minimal buildup, is one of five models designed for in vivo patient dosimetry. Measurements were made using this diode for x-ray beams with kilovoltage potential from 20 to 100 kVp from a superficial x-ray treatment unit. In addition, measurements were also made using calibrated ion chamber designed for low-energy x-ray beams. A cone size of 20 x 20 cm was used and measurements were taken with diode and ion chamber placed at 35 cm from the source. The energy response was determined by taking the ratio of the diode measurement to the ion chamber measurement. The results show that the response of this new diode increases as the quality of the x-ray beam increases at low energy range; however, the percent difference of the detector response between the 70 kVp and 100 kVp x-ray beam is less than 1%, suggesting that this detector can be used as a dosimetry tool for the typical superficial x-ray treatments.

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Citations

Jul 21, 2009·Medical Physics·Paul A Jursinic
Jan 7, 2014·Medical Physics·Benigno BarbésJosep M Martí-Climent
Oct 1, 2015·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·I A TsalafoutasV Tsapaki
Jun 20, 2015·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·Hans SchieferLudwig Plasswilm

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