Japanese journal of medical electronics and biological engineering
Online ISSN : 2185-5498
Print ISSN : 0021-3292
ISSN-L : 0021-3292
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Volume 27, Issue 4
Displaying 1-6 of 6 articles from this issue
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  • High Speed Bone-Cutting and Jointing Simulation Using Run Coordinate Data
    Yasuzo SUTO, Kentaro FURUHATA
    1989 Volume 27 Issue 4 Pages 163-171
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.163
    JOURNAL FREE ACCESS
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    A study of three-dimensional image display in the medical field has been developed by the application of advanced computergraphics and CAD/CAM. Three-dimensional display techniqes have a wide range of medical applications, of which preoperative planning is typical. In this study, we have developed a preoperative simulation system by applying three-dimensional image processing techniques. A variety of such techniques is necessary for preoperative simulation. In this case, we have developed a simulation system for bone-cutting and jointing and have applied it to the preoperative planning for the plastic surgery. Rapidity of processing is also essential, and this has been achieved by the employment of data compression techniques, based on run coordinate data.
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  • Improvements of Ocular Fundus Camera for the 3 Dimensional Measurements by Means of Recording Two Projected Grating Images
    Takeaki YOSHIMURA, Hajime NAKATANI, Norihito SUZUKI
    1989 Volume 27 Issue 4 Pages 172-179
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.172
    JOURNAL FREE ACCESS
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    Topography on the ocular fundus has been achieved with the technique projecting grating images onto the fundus and detecting deformations of the grating images. In this technique, a well known subtraction method has been adaptedby making the grating displace rapidly and recording two grating images before and after the displacement. Consequently, it is found that thesubtraction method is very available to the excavation depth measurements, and the excavation of most normal eyes can be automatically analyz-ed with simple image processing. For measurements of same normal eyes, the excavation at themaximum depth is obtained with high reproducibility. For the contour-mapping displays of the ocular fundus, it has been found that available differences between normal and glaucomatous eyesare obtained.
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  • Characteristics of the Magnetic Fields at the Neck Evoked by the Stimulation of Upper Limb Peripheral Nerves
    Yoshinari MIZUTANI, Shinya KURIKI
    1989 Volume 27 Issue 4 Pages 180-186
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.180
    JOURNAL FREE ACCESS
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    We have measured late magnetic responses at the neck following the electric stimulation of the ulnar nerve at the wrist and at the little finger using a SQUID. The amplitude of the response depended on the subject's posture, i. e., bending of the neck and position and bending of the stimulated arm. Distributions of the magnetic field over the neck showing a polarity reversal between right-left regions and upper-lower regions were observed. This indicates existence of two different current sources directing horizontally and vertically. Excitation of the cutaneous nerve was crucial to evoke the magnetic response. Moreover, the magnetic response was affected by the stimulation rate, where the waveform and the peak latency changed as the stimulation frequency increased above several Hz. Electromyograms of abductor digiti minimi were observed at latencies compatible with those of the magnetic responses at the neck. It was suggested that the long latency reflex is involved in the neural process generating the magnetic responses at the neck.
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  • A New Microelectrode Control System That Displays the Electrode Position on the CRT Brain Map
    Suguru KOBAYASHI
    1989 Volume 27 Issue 4 Pages 187-191
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.187
    JOURNAL FREE ACCESS
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    A new microelectrode control system, developed by the author, penetrates a microelectrode into the rat brain and simultaneously displays an image of the electrode on the CRT brain map. This system is a navigating system of the microelectrode and will be useful to the microelectrode technique at the following points. (1) The user is able to understand the voltage changes leaded from the electrode more easily because he looks at the image of the electrode on the brain map. (2) The user is able to estimate the position of the electrode by this image data. (3) The brain tissue sample will verify the image datum easily. (4) The user is able to control two microelectrodes with the dual electrode mode of the system.
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  • The First Foresight Conference on Nanotechnology
    Iwao FUJIMASA
    1989 Volume 27 Issue 4 Pages 192-195
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.192
    JOURNAL FREE ACCESS
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  • From Local Chapters
    1989 Volume 27 Issue 4 Pages 225-229
    Published: 1989
    Released on J-STAGE: October 14, 2011
    DOIhttps://doi.org/10.11239/jsmbe1963.27.225
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