エハラ　ユウイチ   EHARA YUICHI   江原　雄一    所属   朝日大学  歯学部 口腔病態医療学講座 口腔外科学    朝日大学  大学院 歯学研究科    職種   准教授
発表年月日	2020/06/14
発表テーマ	Usefulness of contrast-enhanced dual-energy computed tomography for detecting oral, head, and neck cancer
会議名	alacibu＆acoms international meeting
主催者	The american college of oral and maxillofacial surgeons
学会区分	国際学会
発表形式	ポスター
単独共同区分	共同
開催地名	florida
発表者・共同発表者	Makoto Matsubara, D.D.S.a; Osamu Tanaka, M.D.b; Yuichi Ehara, D.D.S..a Yasunori Muramatsu, D.D.S..a; Yasuhisa Hasegawa, M.D.c Masayuki Matsuo, M.D.d; Shinichiro Sumitomo, D.D.S..a
概要	Image evaluation in the oral cavity is difficult to quantitatively analyse. All tissues such as bones, muscles, blood vessels, lymph nodes and fat can be visualised only in black and white on computed tomography (CT). Contrast-enhanced dual-energy CT (DECT) is capable of differentiating tissues based on iodine density. The use of DECT during radiotherapy administration allows early assessment of tumour necrosis and overall treatment response. Using DECT with virtual monochromatic imaging (VMI) and iodine density imaging (IDI), the image is expressed in iodine density rather than in CT pixel values.The size and morphology of oral cancer tumours can be accurately determined using DECT if facial bone artefacts can be reduced. Although DECT can construct images with various contrasts, few studies have examined which methods produce the best contrast-enhanced CT images in the oral region.DECT is reportedly more useful than SECT in the whole body.