Virtual CT-Sialography for 3D imaging of the parotid duct

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K11531
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Pathobiological dentistry/Dental radiology
• Research Institution: Kanagawa Dental College (2017-2018); Aichi Gakuin University (2016)
• Principal Investigator: IZUMI masahiro 神奈川歯科大学, 大学院歯学研究科, 准教授 (40212956)
• Co-Investigator(Kenkyū-buntansha): 有地 榮一郎 愛知学院大学, 歯学部, 教授 (00150459) ; 福田 元気 愛知学院大学, 歯学部, 助教 (20750590) ; 野澤 道仁 愛知学院大学, 歯学部, 助教 (20750607)
• Research Collaborator: KAWAMATA ryota ; INNAMI hisashi ; TANIGUCHI motoe ; KOZAI yuusuke ; SAKURAI takashi
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: CT / Sialography / バーチャル / 耳下腺導管 / 3次元画像

Outline of Final Research Achievements

The salivary duct, which is the outflow pathway of saliva, is presumed to be associated with the pathogenesis of various diseases. However, in several imaging for grasping the morphology of the salivary duct, an iodine agent is often used as a contrast medium which may cause serious damage to the human body. In this research, an original computer program, virtual CT-Sailography, was developed to construct a three-dimensional image of the parotid duct based on plain CT image data. It was to be comparable to other imaging techniques using a contrast agent. In additional research derived in this research, the appropriate display conditions for CT images, which had not been clarified until now, were determined, and it was further shown that errors occurred in the key computer software for distance measurements.

Free Research Field

歯科放射線学

Academic Significance and Societal Importance of the Research Achievements

本研究成果に類似した研究は、これまで世界的にも報告がなく、新たな耳下腺導管の描出法を確立したと考えられる。本手法を利用することにより、造影剤を使用せず、CT検査のみで耳下腺導管の大まかな形態情報を把握できる可能性があり、患者の造影剤によるリスクや経済的、時間的負担を軽減できると推測される。
また、距離計測の要となるコンピュータソフトに誤差が生じていることを示した研究成果も、学術的に高い評価が得られると思われる。