GE Revolution CT User Manual page 652

Revolution CT User Manual
Direction 5480385-1EN, Revision 1
system called "Z-Axis Tracking". The closed loop control system uses measured beam position
data from the detector to position the collimator cams in real time. Each blade is automatically
and independently adjusted for optimal beam performance .
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T.Toth, et al., "A dose reduction X-ray beam positioning system for high-speed multi-slice CT
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scanners", Medical Physics, Vol 27, No.12, (Dec 2000)
652 5 System Operational Modes