Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1990-02-13
1992-09-15
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250339, G01N 2159
Patent
active
051480220
ABSTRACT:
A method for optically inspecting a human body and an apparatus for the same serve to scan a light pulse having a visible wavelength to an infrared one on a specific sliced portion of a body to be inspected, for obtaining pieces of projection data about light absorption and to reconstruct an image about distribution of light absorption from the projection data with a computer tomogram. The projection data is measured by alternately radiating a first light pulse at a first wavelength in an absorption wavelength band specific to metabolic materials to be imaged and a second light pulse at a second wavelength being closer to said first wavelength. Then, the data about the transmitted beams are produced by deriving a ratio of integrated values of the first signal to the second one residing within a specific time gate.
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Haida Munetaka
Ito Yoshitoshi
Kawaguchi Fumio
Mitsui Yasuhiro
Takeuchi Hiroshi
Hannaher Constantine
Hitachi , Ltd.
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