A New Resolution Enhancement Technology Using the Independent Sub-Pixel Driving for the Medical Liquid Crystal Displays

Ichikawa, Katsuhiro; Hasegawa, Mikio; Kimura, Naofumi; Kawashima, Hiroki; Kodera, Yoshie

doi:10.1109/jdt.2008.922414

Cited by 9 publications

(11 citation statements)

References 7 publications

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“…However, flat-panel detectors (FPDs) and computed radiography (CR) systems for digital mammography have already achieved resolutions in the range of 13-65 MP, and even 5-MP LCDs, the highestresolution display available, do not have sufficient resolution for FPD and CR systems. Therefore, LCDs with higher resolution are required for use in diagnostic soft-copy reading in mammography, which requires detailed interpretation of very fine lesions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The technology enhances the resolution of LCDs by threefold by utilizing three sub-pixels included in each pixel element of the LCDs for image rendering. By implementation of this technology in conventional monochrome medical LCDs, 15-mega-sub-pixel (MsP) and 9-MsP SHR-LCDs were developed from conventional monochrome 5-MP and 3-MP LCDs, respectively [4,5]. Several recent studies reported the clinical efficacy of conventional 3-MP and 5-MP LCDs, such as detectability and display properties [1-3, 6, 7].…”

Section: Introductionmentioning

confidence: 99%

“…The SHR-LCDs achieve a threefold higher-resolution than do current LCDs in only the sub-pixel direction [4,5,9,10]. Therefore, as the SHR-LCDs provide higher resolution only in the sub-pixel direction, it is necessary to carefully investigate their effectiveness for displaying digital mammograms.…”

Section: Introductionmentioning

confidence: 99%

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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

Nishimura

Ichikawa

Mochiya

et al. 2009

Radiol Phys Technol

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

Nishimura

Ichikawa

Mochiya

et al. 2009

Radiol Phys Technol

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“…However, even 5MP monochrome liquid crystal displays (LCDs), the highest resolution displays, do not have the enough resolution properties (matrix size) to meet the mammography system's resolution. In order to improve these situations, we have developed the super-high resolution liquid crystal displays (SHR-LCDs) using a new resolution enhancement technology, Independent Sub-pixel Driving (ISD) [1,2]. Each pixel of monochrome LCDs consists of three sub-pixels that are equivalent to RGB sub-pixels of color LCDs [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…As shown in Fig.1, the SHR-LCD provides higher image qualities compared with the conventional LCD. The physical characteristics of these SHR-LCDs were already examined, and their higher resolution properties were established [1,2]. Moreover, the noise reduction effect in the clinical image was reported [5].…”

Section: Introductionmentioning

confidence: 99%

Clinical Usefulness of Super High-Resolution Liquid Crystal Displays Using Independent Sub-pixel Driving Technology

Ichikawa

Kawashima

Kimura³

et al.

Digital Mammography

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Abstract.We have developed and reported super-high resolution liquid crystal displays (SHR-LCDs) using a new resolution enhancement technology of the independent sub-pixel driving (ISD) that utilizes three sub-pixels contained in each pixel element. This technology realizes the three-times resolution enhancement of monochrome LCDs. A 15 mega-pixel (MP) SHR-LCD out of a 5MP LCD and a 9MP SHR-LCD out of a 3MP LCD, for example, are realized by this technology, which improves the depiction ability of detailed image shapes such as micro-calcifications of a mammography. Furthermore, the ISD technology brings not only resolution enhancement but also noise reduction effect by the high-frequency data sampling in displaying the clinical images. In this study, we have investigated the clinical efficacy of the SHR-LCDs by means of phantom observation studies and blind observer comparison studies using clinical mammography images performed by radiologists. We used a conventional 5MP LCD for a comparison of a 15MP SHR-LCD and a 9MP SHR-LCD to evaluate their efficacy. From the results of the studies, it was indicated that the SHR-LCDs using the ISD technology had the excellent ability to display the high-resolution digital mammography images.

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Preliminary Study on Sub-Pixel Rendering for Mammography Medical Grade Color Displays

Ichikawa

Kawashima

2014

Breast Imaging

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A New Resolution Enhancement Technology Using the Independent Sub-Pixel Driving for the Medical Liquid Crystal Displays

Cited by 9 publications

References 7 publications

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

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

Clinical Usefulness of Super High-Resolution Liquid Crystal Displays Using Independent Sub-pixel Driving Technology

Preliminary Study on Sub-Pixel Rendering for Mammography Medical Grade Color Displays

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