Fig 1.
The average HU value of each of the four lines on the frontal bone.
The PACS automatically calculates and provides maximum, minimum, and average HU values according to the drawing line.
Table 1.
Characteristics of the study patients.
Table 2.
HU values based on BMD categories and patient characteristics.
Fig 2.
Scatter-plots with linear regression lines depicting the associations between T-scores and HU values of the frontal skull.
(A) LOWESS lines showing the associations between T-score and skull HU in all study patients; (B) Linear lines showing the associations between T-score and skull HU classified by sex; (C) Linear lines showing the associations between T-score and skull HU classified by age-group.
Fig 3.
Cluster plots showing the distributions of skull HU values based on BMD categories.
(A) All study patients. (B) Classified by sex. (C) Classified by age group.
Fig 4.
ROC curves for the determination of optimal cutoff values for predicting osteoporosis.
(A) All study patients. (B) Classified by sex. (C) Classified by age group.