Extended low contrast detectability for radiographic imaging systems

摘要

Systems and methods for determining an extended low contrast detectability performance function for an operating range for a core operating mode of a radiographic imaging system using actual reconstructed images characterize the contrast performance of a radiographic imaging system over its operating range and for any patient size based on the off-line calibration, uses ordered pairs of flux index and contrast index for each scanned object to provide a contrast index for each protocol for each contrast set, and uses the ordered pairs of flux index and contrast index to determine an extended low contrast detectability performance function for the operating range of a radiographic imaging system. Extended low contrast detectability performance data compilation and methods of clinical use, and low contrast phantom configurations and methods of calibration are also disclosed.

主权项

1. A device comprising:
a least one data processor associated with at least one computed tomography image acquisition system; an input operable to receive base relationship data representative of a mathematical relationship derived from a plurality of flux levels of a plurality of radiographic phantom images; the at least one data processor operable to associate image quality metrics correspondingly with flux levels in accordance with the base relationship data; a memory operable to store the base relationship data; an output operable to output display data for display of a plurality of radiographic anatomical images; an input operable to receive image quality selection data corresponding to at least one selected image quality metric selected by an associated user in accordance with the display of radiographic anatomical images; at least one data processor further operable to calculate a unique dose control signal for each of a plurality of radiographic imaging operations in accordance with application of the image quality selection data to corresponding, preassociated relationship data; and an output operable to relay each dose control signal to an associated one of the plurality of radiographic imagers.