Multichannel detectors for profile measurements in clinical proton fields

Nichiporov, Dmitri; Solberg, Keith; Wen, Hsi; Wolanski, Mark; Mascia, Anthony; Farr, Jonathan; Schreuder, Andries

doi:10.1118/1.2746513

Title: Multichannel detectors for profile measurements in clinical proton fields

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Abstract

Two beam profile measurement detectors have been developed at Indiana University Cyclotron Facility to address the need for a tool to efficiently verify dose distributions created with active methods of clinical proton beam delivery. The multipad ionization chamber (MPIC) has 128 ionization chambers arranged in one plane and is designed to measure lateral profiles in fields up to 38 cm in diameter. The MPIC pads have a 5 mm pitch for fields up to 20 cm in diameter and a 7 mm pitch for larger fields, providing the accuracy of field size determination about 0.5 mm. The multilayer ionization chamber (MLIC) detector contains 122 small-volume ionization chambers stacked at a 1.82 mm step (water-equivalent) for depth-dose profile measurements. The MLIC detector can measure profiles up to 20 cm in depth, and determine the 80% distal dose fall-off with about 0.1 mm precision. Both detectors can be connected to the same set of electronics modules, which comprise the detectors' data acquisition system. The detectors have been tested in clinical proton fields produced with active methods of beam delivery such as uniform scanning and energy stacking. This article describes detector performance tests and discusses their results. The test results indicate that themore »« less

Authors:

Nichiporov, Dmitri; Solberg, Keith; Wen, Hsi; Wolanski, Mark; Mascia, Anthony; Farr, Jonathan; Schreuder, Andries ^[1]

Indiana University Cyclotron Facility, 2401 Milo B. Sampson Lane, Bloomington, Indiana 47408 (United States)

Publication Date:: Sun Jul 15 00:00:00 EDT 2007

OSTI Identifier:: 20953318

Resource Type:: Journal Article

Journal Name:: Medical Physics

Additional Journal Information:: Journal Volume: 34; Journal Issue: 7; Other Information: DOI: 10.1118/1.2746513; (c) 2007 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405

Country of Publication:: United States

Language:: English

Subject:: 62 RADIOLOGY AND NUCLEAR MEDICINE; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; BEAM PROFILES; DATA ACQUISITION SYSTEMS; DEPTH DOSE DISTRIBUTIONS; DOSIMETRY; IONIZATION CHAMBERS; IU CYCLOTRON; PHANTOMS; PROTON BEAMS; RADIATION DOSES; RADIOTHERAPY

Citation Formats


                    Nichiporov, Dmitri, Solberg, Keith, Wen, Hsi, Wolanski, Mark, Mascia, Anthony, Farr, Jonathan, Schreuder, Andries, Midwest Proton Radiotherapy Institute, 2425 Milo B. Sampson Lane, Bloomington, Indiana 47408, and ProCure Treatment Centers, Inc., 115 North College Avenue, Suite 210, Bloomington, Indiana 47404. Multichannel detectors for profile measurements in clinical proton fields.  United States: N. p., 2007. 
        Web.  doi:10.1118/1.2746513.

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                    Nichiporov, Dmitri, Solberg, Keith, Wen, Hsi, Wolanski, Mark, Mascia, Anthony, Farr, Jonathan, Schreuder, Andries, Midwest Proton Radiotherapy Institute, 2425 Milo B. Sampson Lane, Bloomington, Indiana 47408, & ProCure Treatment Centers, Inc., 115 North College Avenue, Suite 210, Bloomington, Indiana 47404. Multichannel detectors for profile measurements in clinical proton fields.  United States.  https://doi.org/10.1118/1.2746513

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                    Nichiporov, Dmitri, Solberg, Keith, Wen, Hsi, Wolanski, Mark, Mascia, Anthony, Farr, Jonathan, Schreuder, Andries, Midwest Proton Radiotherapy Institute, 2425 Milo B. Sampson Lane, Bloomington, Indiana 47408, and ProCure Treatment Centers, Inc., 115 North College Avenue, Suite 210, Bloomington, Indiana 47404. 2007.  
        "Multichannel detectors for profile measurements in clinical proton fields".  United States.  https://doi.org/10.1118/1.2746513.

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@article{osti_20953318,

  title        = {Multichannel detectors for profile measurements in clinical proton fields},

  author       = {Nichiporov, Dmitri and Solberg, Keith and Wen, Hsi and Wolanski, Mark and Mascia, Anthony and Farr, Jonathan and Schreuder, Andries and Midwest Proton Radiotherapy Institute, 2425 Milo B. Sampson Lane, Bloomington, Indiana 47408 and ProCure Treatment Centers, Inc., 115 North College Avenue, Suite 210, Bloomington, Indiana 47404},

  abstractNote = {Two beam profile measurement detectors have been developed at Indiana University Cyclotron Facility to address the need for a tool to efficiently verify dose distributions created with active methods of clinical proton beam delivery. The multipad ionization chamber (MPIC) has 128 ionization chambers arranged in one plane and is designed to measure lateral profiles in fields up to 38 cm in diameter. The MPIC pads have a 5 mm pitch for fields up to 20 cm in diameter and a 7 mm pitch for larger fields, providing the accuracy of field size determination about 0.5 mm. The multilayer ionization chamber (MLIC) detector contains 122 small-volume ionization chambers stacked at a 1.82 mm step (water-equivalent) for depth-dose profile measurements. The MLIC detector can measure profiles up to 20 cm in depth, and determine the 80% distal dose fall-off with about 0.1 mm precision. Both detectors can be connected to the same set of electronics modules, which comprise the detectors' data acquisition system. The detectors have been tested in clinical proton fields produced with active methods of beam delivery such as uniform scanning and energy stacking. This article describes detector performance tests and discusses their results. The test results indicate that the MPIC and MLIC detectors can be used for dosimetric characterization of clinical proton fields. The detectors offer significant time savings during measurements in actively delivered beams compared with traditional measurements using a water phantom.},

  doi          = {10.1118/1.2746513},

  url          = {https://www.osti.gov/biblio/20953318},
  journal      = {Medical Physics},

  issn         = {0094-2405},

  number       = 7,

  volume       = 34,

  place        = {United States},

  year         = {Sun Jul 15 00:00:00 EDT 2007},

  month        = {Sun Jul 15 00:00:00 EDT 2007}

}

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