title: Preliminary investigation of the clinical usefulness of super-high-resolution LCDs with 9 and 15 mega-sub-pixels: observation studies with phantoms.
abstract: Our purpose in this study was to evaluate the preliminary clinical efficacy of soft-copy reading of digital mammography, for a 15-mega-sub-pixel (MsP) and a 9-MsP super-high-resolution liquid-crystal display (SHR-LCD) by use of an independent sub-pixel driving technology. We performed three kinds of phantom observation studies by six radiological technologists. Detectability of a contrast-detail phantom and simulated small objects (SSOs) resembling microcalcifications (MCLs), and shape discrimination ability of SSOs with round and square shapes, were examined and compared with a 5-MP conventional LCD (5-MP LCD). In each study, four types of display magnification ratio were used. The detectability and the shape discrimination ability of the 15-MsP SHR-LCD were highest among the three LCDs of most of the display magnification ratios. The 9-MsP SHR-LCD indicated a higher or equal performance as compared with the 5-MP LCD in the SSO detection and shape studies. The results of our study demonstrated that the SHR-LCDs had good potential to detect MCLs and to evaluate the shape in high-resolution digital mammography.
authors.affiliation: Department of Radiology, Kanazawa University Hospital, Takaramachi, Kanazawa, Japan. aya_nsmr@med.kanazawa-u.ac.jp
authors.forename: Aya
authors.initials: A
authors.lastname: Nishimura
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Ichikawa
authors.forename: Yuko
authors.initials: Y
authors.lastname: Mochiya
authors.forename: Ayumi
authors.initials: A
authors.lastname: Morishita
authors.forename: Hiroko
authors.initials: H
authors.lastname: Kawashima
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Mikio
authors.initials: M
authors.lastname: Hasegawa
authors.forename: Naofumi
authors.initials: N
authors.lastname: Kimura
authors.forename: Shigeru
authors.initials: S
authors.lastname: Sanada
mesh_terms: D003626:Data Display; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D050866:Liquid Crystals; D008327:Mammography; D019047:Phantoms, Imaging; D013679:Technology, Radiologic
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