The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1995
Filed:
Jun. 03, 1993
Makoto Yoshida, Kobe, JP;
Yasuki Hanaoka, Ibaraki, JP;
Kenji Morimoto, Ibaraki, JP;
Hitoshi Nakamura, Iwakuni, JP;
Takayuki Ishizaki, Iwakuni, JP;
Teijin Limited, Osaka, JP;
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.