PMID: 8586898Nov 1, 1995Paper

Quality control of the SIGMA applicator using a lamp phantom: a four-centre comparison

International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group
P WustJ van der Zee

Abstract

An elliptical phantom with a fat-equivalent ring and lamp matrix was developed for observing the power distribution in ring applicators used for regional hyperthermia. This phantom was used on four European BSD-2000-type therapy systems under routine conditions to test the quality of the SIGMA-60 applicator (systems in Berlin, Essen, Munich and Rotterdam). Frequency-dependent focusing imbalances were observed in all systems. At the time of the quality control test two of the systems displayed considerable errors in their settings. The system setups and possible ways of correcting errors are described in detail. Small maladjustments are caused by coupling effects between antennas and their surroundings and by interactions between the coaxial cables which supply the power. Serious distortions can be caused by phase errors and defects in cables or plugs; the latter can result in significant long-term restrictions on the ability to control the SAR (specific absorption rate) distribution in a way the user may not notice. The measurements gained from these four systems confirm the need for a practical and universal procedure for quality control in regional hyperthermia.

References

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Citations

Jul 1, 1995·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·H RiessP Schlag
Aug 27, 1998·International Journal of Radiation Oncology, Biology, Physics·P WustR Felix
Mar 31, 1999·International Journal of Radiation Oncology, Biology, Physics·P WustR Felix
Nov 9, 2006·Medical Physics·J GellermannP Wust
Nov 12, 1998·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·S DingesV Budach
May 20, 1998·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·J J LagendijkC Gromoll
Jan 14, 1999·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·J WiersmaC J Schneider
Mar 1, 1997·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·S N HornslethP Raskmark
Oct 28, 1998·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·P WustR Felix
May 10, 2008·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Daryoush Fatehi, Gerard C van Rhoon
Sep 29, 2020·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Sergio CurtoGerard C van Rhoon

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