Modulating x-ray tube current in a CT system

Details Modulating x-ray tube current in a CT system Modulating x-ray tube current in a CT system

1995-11-20

1997-04-29

Wong, Don

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378108, 378109, 378 4, H05G 160

Patent

active

056256620

ABSTRACT:
The present invention, in one form, is an x-ray CT system that modulates x-ray tube current as a function of gantry angle and reconstruction algorithm weighting coefficients. View indexes are stored in a table, and during scanning, values are periodically read from this table to determine weighting coefficients. An algorithm is applied to the weighting coefficients to generate an x-ray tube modulating factor. This modulating factor is then applied to the x-ray tube current to generate modulated x-ray tube current.

REFERENCES:
patent: 5228070 (1993-07-01), Mattson
patent: 5379333 (1995-01-01), Toth
patent: 5485494 (1996-01-01), Williams et al.

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