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Preliminary investigation of the clinical usefulness of super-high-resolution LCDs with 9 and 15 mega-sub-pixels: observation studies with phantoms

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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.

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Authors and Affiliations

  1. Department of Radiology, Kanazawa University Hospital, 13-1 Takaramachi, Kanazawa, 920-8641, Japan

    Aya Nishimura, Yuko Mochiya, Ayumi Morishita & Tomoyuki Yamamoto

  2. Graduate School of Medical Science, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa, 920-0942, Japan

    Katsuhiro Ichikawa, Hiroko Kawashima & Shigeru Sanada

  3. Totoku Electric Co., Ltd, 300 Oya, Ueda, Nagano, 386-0192, Japan

    Mikio Hasegawa & Naofumi Kimura

Authors
  1. Aya Nishimura
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  2. Katsuhiro Ichikawa
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  3. Yuko Mochiya
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  4. Ayumi Morishita
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  5. Hiroko Kawashima
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  6. Tomoyuki Yamamoto
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  7. Mikio Hasegawa
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  8. Naofumi Kimura
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  9. Shigeru Sanada
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Correspondence to Aya Nishimura.

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Nishimura, A., Ichikawa, K., Mochiya, Y. et al. Preliminary investigation of the clinical usefulness of super-high-resolution LCDs with 9 and 15 mega-sub-pixels: observation studies with phantoms. Radiol Phys Technol 3, 70–77 (2010). https://doi.org/10.1007/s12194-009-0079-9

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  • DOI: https://doi.org/10.1007/s12194-009-0079-9

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