Modulation of x-ray tube current during CT scanning with modulat

Details Modulation of x-ray tube current during CT scanning with modulat Modulation of x-ray tube current during CT scanning with modulat

1994-09-06

1995-09-12

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 8, 378108, A61B 600

Patent

active

054504627

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 scout scan is performed to acquire attenuation data which enables an optimal current modulation profile to be calculated for each slice in the scan. The modulation profile is clipped when the modulation limit of the x-ray generator is reached.

REFERENCES:
patent: 4624007 (1986-11-01), Muranushi
patent: 5103469 (1992-04-01), Tanaka
patent: 5379333 (1995-01-01), Toth
U.S. patent application Ser. No. 854,227, filed May 19, 1986 and entitled "Dynamic Flux Intensity Control in Computer Tomography Systems".

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