Medical Imaging and Information Sciences
Online ISSN : 1880-4977
Print ISSN : 0910-1543
ISSN-L : 0910-1543
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Volume 23, Issue 4
Displaying 1-5 of 5 articles from this issue
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  • Medical Applications of Haptic Information
    Masaru KOMORI
    2006 Volume 23 Issue 4 Pages 108-111
    Published: 2006
    Released on J-STAGE: December 05, 2006
    DOIhttps://doi.org/10.11318/mii.23.108
    JOURNAL FREE ACCESS
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    Tactile information are utilized almost everywhere in medical practice. Although the information is important, it is difficult to learn/teach, reproduce and record them. Recent virtual reality technology in medical field can handle a part of tactile information. This paper summarizes tactile sensory of human and progress in haptic devices, and introduces some recent medical applications with haptics. Technical aspects in haptic rendering, delay/latency in haptic response and time/accuracy trade-off in physical elastic simulation are mentioned.
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  • New medical Technology Navigated with Real-time Magnetic Resonance (MR) Imaging
    Tohru TANI, Yoshimasa KURUMI, Yoshihiro ENDO, Nariyuki NAKA, Hisanori ...
    2006 Volume 23 Issue 4 Pages 112-115
    Published: 2006
    Released on J-STAGE: December 05, 2006
    DOIhttps://doi.org/10.11318/mii.23.112
    JOURNAL FREE ACCESS
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  • Computer-aided detection of tracheal bronchus in multi-detector computed tomography images
    Akihiro TAKEMURA, Masayuki SUZUKI, Yusuke OKUMURA
    2006 Volume 23 Issue 4 Pages 116-119
    Published: 2006
    Released on J-STAGE: December 05, 2006
    DOIhttps://doi.org/10.11318/mii.23.116
    JOURNAL FREE ACCESS
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    Tracheal bronchus(TB) is a rare bronchial anomaly, which should be non-invasively diagnosed in chest computed tomography(CT) images. However, it can remain undetected because of its low frequency. A small tool to detect this anomaly in chest CT images will be useful to reduce the incidence of cases in which it goes undetected. We developed a scheme for detection of tracheal bronchus consisting of a two-dimensional rule-based scheme that indicates a slice including TB. Criteria applied to identify tracheal bronchus are : in the slice 1) the trachea region is split into two or more regions, and the area of the larger of the largest two regions is four or more times that of the smaller region, and 2) the circularity of the trachea region is lower than 0.65 and recovers in the next slice. Once one of the criteria is satisfied, the slice is determined to include TB. The scheme was applied to 30 cases(three with and 27 without TB) retrospectively. The sensitivity and specificity was 66.7% and 92.6%, respectively.
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  • Evaluation of edge enhancement in a digital phase contrast imaging
    Satoru MATSUO, Junji MORISHITA, Hiroshi FUJITA, Tetsuro KATAFUCHI, Jun ...
    2006 Volume 23 Issue 4 Pages 120-123
    Published: 2006
    Released on J-STAGE: December 05, 2006
    DOIhttps://doi.org/10.11318/mii.23.120
    JOURNAL FREE ACCESS
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    X-ray beams irradiated from an X-ray tube with a point source or a sufficiently small focal spot produce edgeenhanced images in the boundary of the object due to the effect of phase shift of X-rays. This effect is called phase contrast imaging. A “digital” phase contrast imaging system based on a photostimulable phosphor plate designed for mammography was developed for clinical use recently and now commercially available. However, the effectiveness of the phase contrast imaging applied to the digital system has not been reported yet. In this study, the edge enhancement effect caused by digital phase contrast imaging was evaluated by using the acrylic fiber and acrylic plate, and plant seeds. Our results indicated that higher contrast and sharper images than those for the contact imaging can be obtained. To further improve the image quality of the digital phase contrast imaging, a photostimulable phosphor plate with superior sharpness needs to be developed in the future.
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  • Participating Report of CARS 2006
    Noriyuki TAKAHASHI
    2006 Volume 23 Issue 4 Pages 124-125
    Published: 2006
    Released on J-STAGE: December 05, 2006
    DOIhttps://doi.org/10.11318/mii.23.124
    JOURNAL FREE ACCESS
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    This is a report of CARS 2006 (Computer Assisted Radiology and Surgery 20th International Congress and Exhibition) held at Osaka, Japan during the period of June 28-July 1, 2006. This congress has been held every year for 19 years since 1985, with the aim to provide a forum to close the gap between diagnostic and interventional radiology, surgery and informatics. This report describes my first experience of the presentation at an international congress.
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