Image analysis – Applications – Biomedical applications
Patent
1993-06-03
1995-06-20
Boudreau, Leo H.
Image analysis
Applications
Biomedical applications
348243, G06K 900
Patent
active
054267099
ABSTRACT:
A bone data measurement method and apparatus, using an X-ray picture film having a picture of the sample bone and a picture of the standard matter having gradational steps therein, e.g., an aluminum step wedge, in which a cursory reading of the pictures of the X-ray film is implemented through detection of a quantity level of light that transmits through the X-ray picture film, determining the maximum quantity level ICmax of the transmitting light that transmits through the examined region of the picture of the sample bone, minutely reading the picture of the standard matter so as to find a thickness portion R.sub.1 of the standard matter, in which thickness portion a quantity level of transmitting light that transmits through the thickness portion is larger than and close to ICmax, and adjustably changing illuminating light for illuminating the X-ray picture film so that the quantity level I.sub.R1 of the transmitting light transmitting through the thickness portion R.sub.1 of the standard matter is within a predetermined quantity range of light. A temperature compensation for an output from the transmitting light detecting unit, i.e., a CCD image sensor is carried out by utilizing a light shielded output from the CCD image sensor.
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Hanaoka Yasuki
Ishizaki Takayuki
Morimoto Kenji
Nakamura Hitoshi
Yoshida Makoto
Boudreau Leo H.
Teijin Limited
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