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FIGURE 2. Representative slices from 3D segmented NMR images of 51-y-old male femoral head. Black, white, and gray pixels represent bone trabeculae, active marrow, and adipose tissue, respectively, with the latter implemented using the DEFINED method of voxel tagging. Images are shown for 60% marrow cellularity (A), 60% cellularity showing only bone surface adipose voxels (B), and 60% cellularity showing only marrow space adipose voxels (C). Scale of each panel is 17.3 mm on edge.
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) and as simulated in NMR microscopy images using DEFINED (
) and RANDOM (
) methods of voxel tagging. Comparisons are made at marrow cellularities of 90%–100% (A) and 30%–40% (B).
errors for replicate measurements for different bone trabeculae and for up to 3 different biopsy samples. Data are plotted at means of distance intervals in staggered fashion to better display data error bars.
(TAM
TAM), for self-irradiation of TAM within femoral head of 51-y-old man (A) and that of 82-y-old woman (B). At each value of marrow cellularity, simulation results are shown for all 3 methods of adipocyte introduction within marrow cavities of 3D NMR image: DEFINED method (dashed curves), RANDOM method (solid curves), and 3-Voxel method used previously by Bolch et al. (
