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Title: Silicon-based three-dimensional microstructures for radiation dosimetry in hadrontherapy

In this work, we propose a solid-state-detector for use in radiation microdosimetry. This device improves the performance of existing dosimeters using customized 3D-cylindrical microstructures etched inside silicon. The microdosimeter consists of an array of micro-sensors that have 3D-cylindrical electrodes of 15 μm diameter and a depth of 5 μm within a silicon membrane, resulting in a well-defined micrometric radiation sensitive volume. These microdetectors have been characterized using an {sup 241}Am source to assess their performance as radiation detectors in a high-LET environment. This letter demonstrates the capability of this microdetector to be used to measure dose and LET in hadrontherapy centers for treatment plan verification as part of their patient-specific quality control program.
Authors:
; ;  [1] ; ; ; ; ;  [2] ;  [3] ;  [4] ;  [5]
  1. Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  2. Centro Nacional de Microelectrónica (IMB-CNM, CSIC), Bellaterra 08193 (Spain)
  3. Departamento de Física Atómica, Molecular y Nuclear, University of Sevilla, 41080 Sevilla (Spain)
  4. Departamento de Física de Partículas, Universidad de Santiago de Compostela, Santiago de Compostela 15782 (Spain)
  5. (Spain)
Publication Date:
OSTI Identifier:
22483203
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AMERICIUM 241; DEPTH; DOSEMETERS; MICRODOSIMETRY; MICROSTRUCTURE; PERFORMANCE; QUALITY CONTROL; RADIATION DETECTORS; RADIATION DOSES; SILICON; THREE-DIMENSIONAL LATTICES