Rotatable filter for a pre-subject CT collimator having...

Details Rotatable filter for a pre-subject CT collimator having... Rotatable filter for a pre-subject CT collimator having...

2006-05-16

2006-05-16

Ho, Allen C. (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

C378S016000, C378S098900, C378S158000, C378S159000

Reexamination Certificate

active

07046756

ABSTRACT:
The present invention is directed to a method and apparatus for CT data acquisition using a rotatable pre-subject filter having more than one filtering profile to control radiation exposure to a subject. The filter has one profile used to filter radiation when the radiation source is positioned above a subject and another profile that is used to filter radiation when the radiation source is positioned at a side of the subject.

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