Patent ID: 11864941
Assignee: GE PRECISION HEALTHCARE LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A computed tomography (CT) imaging system, comprising:
an X-ray source configured to emit X-rays during operation;
a radiation detector configured to receive the X-rays;
a pre-patient collimator disposed between the X-ray source and the radiation detector and configured to shape a beam of the X-rays via an aperture; and
processing circuitry configured to perform acts comprising:
acquiring air scan data by causing X-rays to be emitted from the X-ray source toward the radiation detector with the pre-patient collimator at different expected aperture positions;
calculating respective widths of respective normalized intensity distribution profiles for the pre-patient collimator at the different expected aperture positions based on the obtained air scan data;
converting the respective widths to respective doses utilizing a transfer function;
determining a respective dose error estimate at the different expected aperture positions based on the respective doses;
comparing the respective dose error estimates to respective dose tolerance thresholds for the different expected aperture positions; and
generating an output based on the comparison of the respective dose error estimates to the respective dose tolerance thresholds.