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Patent Searching and Data


Title:
RADIATION TOMOGRAPHIC INSPECTING DEVICE
Document Type and Number:
Japanese Patent JPS6157840
Kind Code:
A
Abstract:

PURPOSE: To perform optimum correction for hardening of radiation quality and obtain a reconstituted image of good quality by comparing a radiation attenuation quantity distribution obtained from radiation absorption data of every projection direction or its integral value with the last radiation attenuation quantity distribution or integral value.

CONSTITUTION: The radiation tomographic inspecting device has a BH auxiliary correcting device 12-3 which perform the best auxiliary correction of an X-ray absorption value with an X-ray beam having an attenuation quantity τ after the correction for hardening of radiation quality, and an optimum X-ray attenuation quantity is obtained by correcting the attenuation quantity τ by the auxiliary correction coefficient (g) (τ), thereby equalizing S1 and S2 in area. Namely, X-ray absorption data after the correction for hardening of radiation quality is multiplied by the coefficient (1+Kθg(τ)) consisting of the auxiliary correction coefficient g(τ) and a coefficient Kθ depending upon the projection direction θ of X rays to the cross section of an object body in an shape of point asymmetry to equalize S2 and Sn to each other, thereby obtaining an image of good quality.


Inventors:
UYAMA KIICHIRO
KUROSAWA SHINICHI
Application Number:
JP17964384A
Publication Date:
March 24, 1986
Filing Date:
August 29, 1984
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
A61B6/03; G01B15/00; G01N23/04; (IPC1-7): A61B6/03; G01N23/04
Attorney, Agent or Firm:
Takehiko Suzue