Contribution of Organ-Based Tube Current Modulation to the Reduction of Lens Exposure Dose in Head 4D CT Imaging: A Phantom Study

The purpose of this study was to evaluate the effectiveness of organ effect modulation (OEM) in reducing the lens dose in 4D computed tomography (CT) of the head in volume-acquisition (NVA) mode. Six radiophotoluminescent dosemeters were placed on the head of a RANDO phantom. The doses absorbed by t...

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Bibliographic Details
Published in:Radiation protection dosimetry 2022-10, Vol.198 (18), p.1377-1386
Main Authors: Nagamoto, Keisuke, Watanabe, Ryo, Kawachino, Tomonori, Ohishi, Yoshitaka, Yamamoto, Aina, Moritake, Takashi, Nihei, Shun-ichi, Kamochi, Masayuki, Kunugita, Naoki
Format: Article
Language:English
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Summary:The purpose of this study was to evaluate the effectiveness of organ effect modulation (OEM) in reducing the lens dose in 4D computed tomography (CT) of the head in volume-acquisition (NVA) mode. Six radiophotoluminescent dosemeters were placed on the head of a RANDO phantom. The doses absorbed by the organs and image noise change rate were determined. The lens doses without OEM (i.e. in the OEMoff case) were higher than those with the same target standard deviation and volume-computed tomography dose index (CTDIvol) as in the OEMoff case (p 
ISSN:0144-8420
1742-3406
DOI:10.1093/rpd/ncac179