Table 2:

General plaque characteristics by MRI-derived AHA lesion type

MRI-AHA Lesion TypeMaximum Wall ThicknessMaximum Soft Plaque ThicknessMaximum Hard Plaque ThicknessMinimum DensityMaximum DensityMean DensityNASCET Percentage Stenosis
I-II2.2 ± 0.61.8 ± 0.61.4 ± 0.838 ± NAa197 ± NAa82 ± NAa0.0% ± NAa
III3.7 ± 0.51.8 ± 0.83.0 ± 0.541 ± 18224 ± 68114 ± 2915.1% ± 12.5%
IV-V4.0 ± 0.32.9 ± 0.52.4 ± 0.514 ± 10134 ± 2159 ± 1221.1% ± 8.0%
VI5.3 ± 0.44.7 ± 0.52.5 ± 0.518 ± 9143 ± 1860 ± 1246.3% ± 10.6%
VII4.4 ± 0.71.1 ± 0.53.9 ± 0.531 ± 8215 ± 3391 ± 1133.1% ± 14.0%
Total4.2 ± 0.32.8 ± 0.42.7 ± 0.320 ± 6152 ± 1767 ± 926.7% ± 5.6%
  • Note:—Thickness is given in millimeters; density of the soft plaque component in Hounsfield units (HU) ±CI. AHA indicates American Heart Association.

  • a Only 1 HU measurement was obtained for AHA lesion type I/II, therefore no CIs are reported.