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

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ID: 320943
2026
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Abstract
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.
Reference Key
openalex_W7168296169 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Masanao Kobayashi, Juria Suzuki, Yusei Nishihara, Tomonobu Haba, Shigeki Kobayashi
Journal Radiation protection dosimetry
Year 2026
DOI
10.1093/rpd/ncag073
URL
https://doi.org/10.1093/rpd/ncag073
Keywords Keywords not found

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