カミヤ　コウヘイ   Kamiya Kohei   神谷　昂平    所属   東邦大学  医学部 医学科（大森病院）    職種   講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Metal artefact reduction for patients with metallic dental fillings in helical neck computed tomography: comparison of adaptive iterative dose reduction 3D (AIDR 3D), forward-projected model-based iterative reconstruction solution (FIRST) and AIDR 3D with
掲載誌名	正式名：DENTOMAXILLOFACIAL RADIOLOGY ISSNコード：0250832X
出版社	BRITISH INST RADIOLOGY
巻・号・頁	45(7),pp.114
著者・共著者	Koichiro Yasaka,Kouhei Kamiya,Ryusuke Irie,Eriko Maeda,Jiro Sato,Kuni Ohtomo
発行年月	2016/06/22
概要	Objectives: To compare the differences in metal artefact degree and the depiction of structures in helical neck CT, in patients with metallic dental fillings, among adaptive iterative dose reduction three dimensional (AIDR 3D), forward-projectedmodel-based iterative reconstruction solution (FIRST) and AIDR 3D with single-energy metal artefact reduction (SEMAR-A).Methods: In this retrospective clinical study, 22 patients (males, 13; females, 9; mean age, 64.6 +/- 12.6 years) with metallic dental fillings who underwent contrast-enhanced helical CT involving the oropharyngeal region were included. Neck axial images were reconstructed with AIDR 3D, FIRST and SEMAR-A. Metal artefact degree and depiction of structures (the apex and root of the tongue, parapharyngeal space, superior portion of the internal jugular chain and parotid gland) were evaluated on a four-point scale by two radiologists. Placing regions of interest, standard deviations of the oral cavity and nuchal muscle (at the slice where no metal exists) were measured and metal artefact indices were calculated (the square root of the difference of the squares of them).Results: In SEMAR-A, metal artefact was significantly redu
DOI	10.1259/dmfr.20160114