Table 2:

Mean in-vivo CT Hounsfield density, SD, and 95% confidence interval for each histologic component^*

Histologic Component	Mean (HU)	SD (HU)	95% Confidence Interval (HU)
Lipid-rich necrotic core	32.6	20.0	−7.4	72.5
Connective tissue	46.4	19.9	6.6	86.2
Hemorrhage	97.5	22.0	53.5	141.6
Calcifications	256.7	30.2	216.3	297.1

Note:—HU indicates Hounsfield units.

^*Determined by comparison of each 2 × 2-mm square electronically drawn on the in vivo CT reformatted images with corresponding histologic and micro-CT squares.