Real-time feedback for preventing high dose C-Arch geometry positions

摘要

An apparatus aids operation of an interventional x-ray imager during image acquisition, where the X-ray imager is configured to vary X-ray dosages depending on differences in X-ray attenuation levels across an object of interest to be imaged. The X-ray imager is further configured to assume any one of a plurality of imaging geometry positions when acquiring an image. An indication, visual, acoustic or haptic, to the operator of the X-ray imager is provided on the incurred change in X-ray dosage when changing from a current projection view to an updated projection view, while a given constant image quality is maintained throughout the different views.

主权项

1. An apparatus for aiding operation of an x-ray imager during an image acquisition procedure, the X-ray imager being configured to vary X-ray dosages depending on differences in X-ray attenuation levels across an object of interest to be imaged, the X-ray imager being further configured to assume any one of a plurality of imaging geometry positions when acquiring an image, the apparatus comprising:
an input unit configured to receive a request to change a current imaging geometry position for an updated imaging geometry position for use in an image acquisition; a memory unit configured to store a function relationship between the plurality of imaging geometry position and the X-ray dosages, the function relationship being based on expected X-ray attenuation levels in the object of interest; and an output unit configured to use the stored function relationship to provide to an operator of the X-ray imager an indication of a relative change in X-ray dosage required at the updated imaging geometry position relation to the X-ray dosage required at a reference position.