title: 320-Row wide volume CT significantly reduces density heterogeneity observed in the descending aorta: comparisons with 64-row helical CT.
abstract: The aim of this study was to compare density heterogeneity on wide volume (WV) scans with that on helical CT scans. 22 subjects underwent chest CT using 320-WV and 64-helical modes. Density heterogeneity of the descending aorta was evaluated quantitatively and qualitatively. At qualitative assessment, the heterogeneity was judged to be smaller on WV scans than on helical scans (p<0.0001). Mean changes in aortic density between two contiguous slices were 1.64 HU (3.40%) on WV scans and 2.29 HU (5.19%) on helical scans (p<0.0001). CT density of thoracic organs is more homogeneous and reliable on WV scans than on helical scans.
authors.affiliation: Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan. Electronic address: clatsune@yahoo.co.jp.
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Yamashiro
authors.affiliation: Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan. Electronic address: mchutetsu@yahoo.co.jp.
authors.forename: Tetsuhiro
authors.initials: T
authors.lastname: Miyara
authors.affiliation: Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan. Electronic address: ohonda@radiol.med.osaka-u.ac.jp.
authors.forename: Osamu
authors.initials: O
authors.lastname: Honda
authors.affiliation: Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan. Electronic address: ayano1242004@yahoo.co.jp.
authors.forename: Ayano
authors.initials: A
authors.lastname: Kamiya
authors.affiliation: Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan. Electronic address: therethere_y@yahoo.co.jp.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Tanaka
authors.affiliation: Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan. Electronic address: sadayuki@med.u-ryukyu.ac.jp.
authors.forename: Sadayuki
authors.initials: S
authors.lastname: Murayama
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001027:Aortography / Q000379:methods*; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D013902:Radiography, Thoracic / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult
keywords: Aorta; Artifact; Computed tomography; Helical scanning; Wide volume scanning