Emphysema Metrics

          Standard emphysema metrics, including median lung CT number, are points on the cumulative frequency distribution of lung CT number histogram.

          Mean lung CT number and mean lung CT number are highly correlated. (different but highly correlated)

          Mean lung CT number correlated with bulk lung density

          Median-mean lung CT number does not depend on:

        Reconstruction kernel

        Slice thickness

        Image noise (radiation dose or mAs)

          Precision of median-mean lung CT number or bulk lung density is preferred instrumental precision claim because is simple and can be supported with phantom measurements.


Philip Judy,
Sep 18, 2011, 4:49 AM