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Table 3 The Table represents the area (in mm2) and % MR signal intensity (in I.U.) of different plaque constituents i.e. calcification, fibrous, necrotic core, and lipid core in four coronary plaques (A, B, C and D) shown in Figure 4. Combined multi-contrast ex vivo PD weighted, T1 weighted and T2 weighted MR images were used for area measurement of each constituent and its % MR signal intensity (in arbitrary units) on any of the image set showing it highest MRI visible.

From: MRI of coronary artery atherosclerosis in rabbits: Histopathology-MRI correlation and atheroma characterization

Constituent Area of constituents(mm2) % MR Signal Intensity(I.U.)
  Plaque A Plaque B Plaque C Plaque D Plaque A Plaque B Plaque C Plaque D
Total Plaque 1.1 2.41 2.34 2.98 100 100 100 100
Calcification 0.24 1.09 0.49 -- 21.8 4.5 21.3 24.5
Fibrous Tissue 0.14 -- -- 0.16 10.4 -- -- 5.1
Cholesterol -- 0.65 -- -- -- 2.7 -- --
Matrix -- 0.24 -- -- -- 9.3 -- --
Lipid Core -- -- 1.17 0.42 -- -- 5.0 1.4
Necrotic Core 0.54 0.50 0.38 1.00 4.9 2.1 16.2 3.3
Unclassified Core 0.23 0.55 0.27 0.19 -- -- -- --