Siemens syngo CT 2005C - Manual (Page 284)

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syngo Osteo CT
The other summary image displays a graph which
shows the comparison of all evaluated vertebrae with
the selected Reference Data.
“T-score”
This is the deviation of average BMD of the patient
from that of a young healthy comparison group. It rep-
resents bone loss with reference to the peak bone
mass.
“Z-score”
This is the deviation of average BMD of the patient
from that of a healthy person of the same age. It is an
indicator of biological variability.
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book Page 284 Friday, April 8, 2005 9:55 AM