Volumetric lean percentage measurement using dual energy mammography
Comparison of apparent breast density to known density for published values of breast composition vs a single calibration with the plastic resin phantoms. Note the lines at the endpoints are not measurement error bars but illustrate the range of values observed for all values of breast composition used in this analytical model.
Comparison of VLP as measured from dual energy images to VLP as determined by scale mass. The data were related by VLPI = 1.53 VLPM + 10.0 (r 2>0.99).
Comparison of VLP as measured from chemical analysis to VLP as determined by scale mass. The data from the repeat tests of the endpoints of 0 and 100%, as signified by the star symbol, agreed within 1% of the first test. The data were related by VLPCA = 0.76 VLPM + 22.8 (r 2>0.99).
Comparison of breast density as measured from dual energy images to glandular volume percentage as measured from chemical analysis. The data were related by VLPI = 2.00 VLPCA – 35.6 (r 2>0.99).
The data of Woodard and White is shown alongside the bovine tissue data in this study. Note for the data in this study, the error bars were too small to be seen. The RMS difference for the two adipose tissues was 1.2%. The RMS difference for lean and skeletal muscle tissue were 0.4 and 22.2% for lean and mammary gland tissues.
Density and elemental compositions of adipose tissue, glandular tissue as reported by Hammerstein and their phantom equivalents.
Density and elemental compositions of adipose tissue and glandular tissue used in theoretical investigations.
Summary of the apparent densities of breast tissue as compared to the composition determined from chemical analysis.
Summary data of the lean percentage, VLPM, VLPI, and VLPCA for all points in the study. The repeat measurements of the two endpoints from chemical analysis are shown sequentially and separated by a comma.
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