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Visualization of time-resolved scattered radiation distribution in a computed tomography room utilizing a semiconductor survey meter.

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Title: Visualization of time-resolved scattered radiation distribution in a computed tomography room utilizing a semiconductor survey meter.
Authors: Kobayashi M; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan., Suzuki J; Department of Radiology, Fujita Health University Okazaki Medical Center, 1 Gotannda, Harisaki-cho, Okazaki, Aichi, Japan., Nishihara Y; Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan., Haba T; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan., Kobayashi S; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.
Source: Radiation protection dosimetry [Radiat Prot Dosimetry] 2026 Oct 06; Vol. 202 (16), pp. 1354-1364.
Publication Type: Journal Article
Language: English
Journal Info: Publisher: Oxford University Press Country of Publication: England NLM ID: 8109958 Publication Model: Print Cited Medium: Internet ISSN: 1742-3406 (Electronic) Linking ISSN: 01448420 NLM ISO Abbreviation: Radiat Prot Dosimetry Subsets: MEDLINE
Imprint Name(s): Publication: 2004- : Oxford, UK : Oxford University Press
Original Publication: Ashford, Kent : Nuclear Technology Pub., c1981-
MeSH Terms: Occupational Exposure*/analysis , Occupational Exposure*/prevention & control , Tomography, X-Ray Computed*/instrumentation , Tomography, X-Ray Computed*/methods , Radiation Monitoring*/instrumentation , Radiation Monitoring*/methods , Radiation Protection*/instrumentation , Radiation Protection*/methods , Radiometry*/instrumentation , Semiconductors* , Scattering, Radiation*, Humans ; Radiation Dosage ; Phantoms, Imaging
Abstract: In diagnostic computed tomography (CT), radiological technologists and assisting staff may need to remain inside the CT room during patient assistance. Understanding temporal changes in scattered radiation distribution is therefore important for reducing occupational exposure. Conventional measurements mainly provide instantaneous dose rates or accumulated doses and are less suited to intuitively capturing temporal changes during CT scanning. This study conducted a fundamental investigation of a visualization approach, defined as dynamic dose distribution (DDD), based on time-resolved air kerma measurements obtained with a semiconductor survey meter. Scattered radiation was measured during chest-to-pelvis helical CT scanning of an anthropomorphic phantom under fixed tube current and automatic exposure control conditions. DDD allowed temporal changes in scattered radiation distribution to be visually identified in relation to tube current modulation, patient table position, and measurement height. DDD may provide useful temporal information for considering staff positioning and reducing occupational exposure.
(© The Author(s) 2026. Published by Oxford University Press. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Grant Information: JP23K07143 JSPS
Entry Date(s): Date Created: 20260714 Date Completed: 20261006 Latest Revision: 20261006
Update Code: 20261006
DOI: 10.1093/rpd/ncag073
PMID: 42447278
Database: MEDLINE
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An: 42447278
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PubType: Academic Journal
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  Data: Visualization of time-resolved scattered radiation distribution in a computed tomography room utilizing a semiconductor survey meter.
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  Data: <searchLink fieldCode="AU" term="%22Kobayashi+M%22">Kobayashi M</searchLink>; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.<br /><searchLink fieldCode="AU" term="%22Suzuki+J%22">Suzuki J</searchLink>; Department of Radiology, Fujita Health University Okazaki Medical Center, 1 Gotannda, Harisaki-cho, Okazaki, Aichi, Japan.<br /><searchLink fieldCode="AU" term="%22Nishihara+Y%22">Nishihara Y</searchLink>; Department of Radiology, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.<br /><searchLink fieldCode="AU" term="%22Haba+T%22">Haba T</searchLink>; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.<br /><searchLink fieldCode="AU" term="%22Kobayashi+S%22">Kobayashi S</searchLink>; Graduate School of Medical Sciences, Fujita Health University, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, Japan.
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22Oxford+University+Press%22">Oxford University Press </searchLink><i>Country of Publication: </i>England <i>NLM ID: </i>8109958 <i>Publication Model: </i>Print <i>Cited Medium: </i>Internet <i>ISSN: </i>1742-3406 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2201448420%22">01448420 </searchLink><i>NLM ISO Abbreviation: </i>Radiat Prot Dosimetry <i>Subsets: </i>MEDLINE
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  Data: <i>Publication</i>: 2004- : Oxford, UK : Oxford University Press<br /><i>Original Publication</i>: Ashford, Kent : Nuclear Technology Pub., c1981-
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  Data: <searchLink fieldCode="MM" term="%22Occupational+Exposure%22">Occupational Exposure*</searchLink>/<searchLink fieldCode="MM" term="%22Occupational+Exposure+analysis%22">analysis</searchLink> <br /><searchLink fieldCode="MM" term="%22Occupational+Exposure%22">Occupational Exposure*</searchLink>/<searchLink fieldCode="MM" term="%22Occupational+Exposure+prevention+%26+control%22">prevention & control</searchLink> <br /><searchLink fieldCode="MM" term="%22Tomography%2C+X-Ray+Computed%22">Tomography, X-Ray Computed*</searchLink>/<searchLink fieldCode="MM" term="%22Tomography%2C+X-Ray+Computed+instrumentation%22">instrumentation</searchLink> <br /><searchLink fieldCode="MM" term="%22Tomography%2C+X-Ray+Computed%22">Tomography, X-Ray Computed*</searchLink>/<searchLink fieldCode="MM" term="%22Tomography%2C+X-Ray+Computed+methods%22">methods</searchLink> <br /><searchLink fieldCode="MM" term="%22Radiation+Monitoring%22">Radiation Monitoring*</searchLink>/<searchLink fieldCode="MM" term="%22Radiation+Monitoring+instrumentation%22">instrumentation</searchLink> <br /><searchLink fieldCode="MM" term="%22Radiation+Monitoring%22">Radiation Monitoring*</searchLink>/<searchLink fieldCode="MM" term="%22Radiation+Monitoring+methods%22">methods</searchLink> <br /><searchLink fieldCode="MM" term="%22Radiation+Protection%22">Radiation Protection*</searchLink>/<searchLink fieldCode="MM" term="%22Radiation+Protection+instrumentation%22">instrumentation</searchLink> <br /><searchLink fieldCode="MM" term="%22Radiation+Protection%22">Radiation Protection*</searchLink>/<searchLink fieldCode="MM" term="%22Radiation+Protection+methods%22">methods</searchLink> <br /><searchLink fieldCode="MM" term="%22Radiometry%22">Radiometry*</searchLink>/<searchLink fieldCode="MM" term="%22Radiometry+instrumentation%22">instrumentation</searchLink> <br /><searchLink fieldCode="MM" term="%22Semiconductors%22">Semiconductors*</searchLink> <br /><searchLink fieldCode="MM" term="%22Scattering%2C+Radiation%22">Scattering, Radiation*</searchLink><br /><searchLink fieldCode="MH" term="%22Humans%22">Humans</searchLink> ; <searchLink fieldCode="MH" term="%22Radiation+Dosage%22">Radiation Dosage</searchLink> ; <searchLink fieldCode="MH" term="%22Phantoms%2C+Imaging%22">Phantoms, Imaging</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In diagnostic computed tomography (CT), radiological technologists and assisting staff may need to remain inside the CT room during patient assistance. Understanding temporal changes in scattered radiation distribution is therefore important for reducing occupational exposure. Conventional measurements mainly provide instantaneous dose rates or accumulated doses and are less suited to intuitively capturing temporal changes during CT scanning. This study conducted a fundamental investigation of a visualization approach, defined as dynamic dose distribution (DDD), based on time-resolved air kerma measurements obtained with a semiconductor survey meter. Scattered radiation was measured during chest-to-pelvis helical CT scanning of an anthropomorphic phantom under fixed tube current and automatic exposure control conditions. DDD allowed temporal changes in scattered radiation distribution to be visually identified in relation to tube current modulation, patient table position, and measurement height. DDD may provide useful temporal information for considering staff positioning and reducing occupational exposure.<br /> (© The Author(s) 2026. Published by Oxford University Press. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
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  Data: <i>Date Created: </i>20260714 <i>Date Completed: </i>20261006 <i>Latest Revision: </i>20261006
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PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=cmedm&AN=42447278
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        Value: 10.1093/rpd/ncag073
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        Text: English
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        StartPage: 1354
    Subjects:
      – SubjectFull: Humans
        Type: general
      – SubjectFull: Radiation Dosage
        Type: general
      – SubjectFull: Phantoms, Imaging
        Type: general
      – SubjectFull: Occupational Exposure analysis
        Type: general
      – SubjectFull: Occupational Exposure prevention & control
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      – SubjectFull: Tomography, X-Ray Computed instrumentation
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      – SubjectFull: Tomography, X-Ray Computed methods
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      – SubjectFull: Radiation Monitoring instrumentation
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      – SubjectFull: Radiation Monitoring methods
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      – SubjectFull: Radiation Protection instrumentation
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      – SubjectFull: Radiometry instrumentation
        Type: general
      – SubjectFull: Semiconductors
        Type: general
      – SubjectFull: Scattering, Radiation
        Type: general
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              Text: 2026 Oct 06
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