Portable triple silicon detector telescope spectrometer for skin dosimetry |
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| Affiliation: | 1. Department of Radiation Oncology, University of Washington School of Medicine, Seattle, WA;2. SCCA Proton Therapy, a ProCure Center, Seattle, WA;1. Cardiovascular Research Institute, University Hospital Basel, Basel, Switzerland;2. Department of Internal Medicine, Rush University, Chicago, Illinois;3. Department of Electrophysiology, Charleston Hospital, Charleston, South Carolina;4. Division of Cardiovascular Medicine, Kobe City Medical Center General Hospital, Kobe, Japan;6. Department of Cardiology, Asklepios Klinik St. Georg, Hamburg, Germany;5. Hospital Clínic de Barcelona, Servicio de Cardiología, Barcelona, Spain;7. Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium;11. St. Bartholomew’s Hospital, Barts Health NHS Trust, London, United Kingdom;12. Institute of Health Informatics Research, University College of London, London, United Kingdom;8. Department of Cardiology, Clinique St. Pierre, Perpignan, France;10. Medizinische Klinik IV, Städtisches Klinikum Karlsruhe, Karlsruhe, Germany;9. Department of Cardiology, Pasteur Hospital, University Hospital of Nice, Nice, France;71. National Medical Research Center for Preventive Medicine of the Ministry of Healthcare of the Russian Federation, Heart Rhythm and Conduction Disorder, Moscow, Russia;112. Isala Heart Centre, Zwolle, the Netherlands;123. Diagram, Zwolle, the Netherlands;84. Department of Cardiology, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), CIBER de Enfermedades Cardiovasculares, Cardiovascular Institute, Madrid, Spain;106. Department of Cardiology, University Hospital Basel, Basel, Switzerland;95. National University Hospital, Singapore;77. Cardiac Arrhythmia Service, University of Michigan, Ann Arbor, Michigan;1111. Cardiology Division – Electrophysiology, Sant''Andrea Hospital, Vercelli, Italy;1212. Center for Atrial Fibrillation, UPMC Heart and Vascular Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania;88. Division of Cardiology “Città della Salute e della Scienza di Torino” Hospital, Department of Medical Sciences, University of Turin, Turin, Italy;1. Institute for Clinical and Experimental Medicine, Prague, Czech Republic;2. University Hospital Ostrava, Ostrava, Czech Republic;3. Podlesí Hospital, Třinec, Czech Republic |
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| Abstract: | The features of a newly developed portable beta telescope spectrometer are described. The detector probe uses three silicon detectors with the thickness: 50 μm/150 μm/7000 μm covered by a 2 μm thick titanium window. Rejection of photon contributions from mixed beta/photon exposures is achieved by coincidence requirements between the detector signals. The silicon detectors, together with cooling aggregate, bias supplies, preamplifiers and charge generation for calibration are contained in a handy detector probe. Through a 3- or 10-m cable the detector unit is connected to a compact, portable processing unit including a laptop computer executing control, monitor, histogram and display tasks. The use of digital signal processing at an early stage of the signal chain has facilitated the achievement of a compact, low-weight device. 256 channels are available for each of the three detectors. The LabVIEWTM software distributed by National Instruments was used for all program developments for the spectrometer, comprising also the capability of evaluating the absorbed dose rates from the measured beta spectra. The report describes the capability of the telescope spectrometer to measure beta and photon spectra as well as beta dose rates in mixed beta/photon radiation fields. It also describes the main features of the digital signal-processing electronics. |
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