• [Quantitative Evaluation of Ev...

Treffer: [Quantitative Evaluation of Evacuation Criteria Based on Scattered Radiation Shielding Performance of a Protective Screen during Portable Dynamic Chest Radiography].

Title:
[Quantitative Evaluation of Evacuation Criteria Based on Scattered Radiation Shielding Performance of a Protective Screen during Portable Dynamic Chest Radiography].
Authors:
Sato Y; Department of Radiological Technology, St. Marianna University Hospital., Ono K; Advanced Image Development Division, Medical Imaging R&D Center, Healthcare Business Headquarters, KONICA MINOLTA, INC., Hatsumi K; Department of Radiological Technology, St. Marianna University Hospital., Takuma K; Department of Radiological Technology, St. Marianna University Hospital., Matsumoto J; Department of Emergency and Critical Care Medicine, St. Marianna University School of Medicine., Haraguchi T; Department of Diagnostic and Interventional Radiology, St. Marianna University School of Medicine., Takakura N; Department of Radiological Technology, St. Marianna University Hospital.
Source:
Nihon Hoshasen Gijutsu Gakkai zasshi [Nihon Hoshasen Gijutsu Gakkai Zasshi] 2026; Vol. 82 (3).
Publication Type:
English Abstract; Journal Article
Language:
Japanese
Journal Info:
Publisher: Nihon Hōshasen Gijutsu Gakkai Country of Publication: Japan NLM ID: 7505722 Publication Model: Print Cited Medium: Internet ISSN: 1881-4883 (Electronic) Linking ISSN: 03694305 NLM ISO Abbreviation: Nihon Hoshasen Gijutsu Gakkai Zasshi Subsets: MEDLINE
Imprint Name(s):
Original Publication: Kyoto : Nihon Hōshasen Gijutsu Gakkai
MeSH Terms:
Radiation Protection*/instrumentation , Radiation Protection*/methods , Radiography, Thoracic*/instrumentation, Humans ; Phantoms, Imaging ; Scattering, Radiation ; Radiation Dosage
Contributed Indexing:
Keywords: conventional chest radiography; dynamic chest radiography; portable X-ray; radiation protection; scattered X-ray distribution
Entry Date(s):
Date Created: 20251203 Date Completed: 20251203 Latest Revision: 20251203
Update Code:
20251204
DOI:
10.6009/jjrt.26-1570
PMID:
41338973
Database:
MEDLINE

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Purpose: Portable dynamic chest radiography (DCR) offers high clinical utility but also raises concerns about increased scattered radiation exposure to surrounding personnel. This study aimed to optimize radiation protection by quantitatively assessing the shielding performance of a protective screen and by evaluating evacuation criteria.
Methods: Scattered radiation was measured using an anthropomorphic phantom and an ionization chamber-type survey meter under various imaging conditions, with and without a mobile protective screen (0.25 mmPb equivalent). Four quantitative indicators were introduced: dose reduction ratio (DR ratio), evacuation area (EA), evacuation area ratio (EA ratio), and evacuation distance (ED).
Results: Use of the protective screen reduced scattered radiation by over 80%, expanded the EA by up to 55.5%, and shortened the ED by more than 100 cm. These findings indicate its effectiveness in creating safer imaging environments in limited spaces.
Conclusion: The proposed indicators provide an objective method for assessing the shielding performance of protective screens in portable DCR. These results support the development of evacuation criteria to reduce exposure for healthcare workers and nearby patients.