Modulation of X-ray tube current during CT scanning

Details Modulation of X-ray tube current during CT scanning Modulation of X-ray tube current during CT scanning

1994-08-03

1996-01-16

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378145, 378110, A61B 600

Patent

active

054854946

ABSTRACT:
An x-ray CT system modulates x-ray tube current as a function of gantry angle to reduce the total patient dose without significantly increasing image noise. A modulation waveform is stored in a table as a function of gantry angle, and during a slice acquisition, values are periodically read from this table and employed to calculate tube current commands. Tube current is monitored and compared with the latest command to ensure the proper x-ray dose is applied.

REFERENCES:
patent: 5228070 (1993-07-01), Mattson
patent: 5379333 (1995-01-01), Toth

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