title: Optimum CT reconstruction parameters for vascular and hepatocellular carcinoma models in a liver phantom with multi-level dynamic computed tomography with 64 detector rows: a basic study.
abstract: We quantified to clarify the optimum factors for CT image reconstruction of an enhanced hepatocellular carcinoma (HCC) model in a liver phantom obtained by multi-level dynamic computed tomography (M-LDCT) with 64 detector rows. After M-LDCT scanning of a water phantom and an enhanced HCC model, we compared the standard deviation (SD, 1 ± SD), noise power spectrum (NPS) values, contrast-noise ratios (CNR), and the M-LDCT image among the reconstruction parameters, including the convolution kernel (FC11, FC13, and FC15), post-processing quantum filters (2D-Q00, 2D-Q01, and 2D-Q02) and slice thicknesses/slice intervals. The SD and NPS values were lowest with FC11 and 2D-Q02. The CNR values were highest with 2D-Q02. The M-LDCT image quality was highest with FC11 and 2D-Q02, and with slice thicknesses/slice intervals of 0.5 mm/0.5 mm and 0.5 mm/0.25 mm. The optimum factors were the FC11 convolution kernel, 2D-Q02 quantum filter, and 0.5 mm slice thickness/0.5 mm slice interval or less.
authors: Department of Radiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama, Wakayama 641-8510, Japan.
authors: Kazuhiro
authors: K
authors: Murotani
authors: Murotani
authors: M
authors: Kazuhiro
authors: Nobuyuki
authors: N
authors: Kawai
authors: Morio
authors: M
authors: Sato
authors: Hiroki
authors: H
authors: Minamiguchi
authors: Motoki
authors: M
authors: Nakai
authors: Tetsuo
authors: T
authors: Sonomura
authors: Seiki
authors: S
authors: Hosokawa
authors: Tadayoshi
authors: T
authors: Nishioku
mesh_terms: D000465:Algorithms; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008113:Liver Neoplasms / Q000000981:diagnostic imaging*; D019047:Phantoms, Imaging; D011857:Radiographic Image Interpretation, Computer-Assisted; D014057:Tomography, X-Ray Computed; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging*; D014867:Water
chemical_list: D014867:Water