Table 2.
Classification results summary
| Feature | IVUS | FLIm | FLIm-IVUS | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SN (%) | SP (%) | PPV (%) | SN (%) | SP (%) | PPV (%) | SN (%) | SP (%) | PPV (%) | |
| DIT | 81 | 81 | 71 | 100 | 96 | 93 | 87 | 100 | 100 |
| PIT | 50 | 84 | 40 | 94 | 98 | 91 | 84 | 100 | 100 |
| ThCFA | 29 | 99 | 80 | 57 | 100 | 100 | 86 | 100 | 100 |
| ThCFAM | 0 | 100 | NaN | 71 | 100 | 100 | 86 | 100 | 100 |
| TCFA | 0 | 100 | NaN | 90 | 100 | 100 | 80 | 100 | 100 |
| FC | 100 | 99 | 97 | 44 | 99 | 94 | 100 | 99 | 97 |
| FT | 0 | 100 | NaN | 100 | 90 | 40 | 92 | 99 | 92 |
| LFA | 100 | 91 | 19 | 0.0 | 100.0 | NaN | 100 | 92 | 21 |
| Mean | 45 | 94 | 61 | 70 | 98 | 88 | 89 | 99 | 89 |
DIT diffuse intimal thickening, PIT pathological intimal thickening, ThCFA thick-cap fibroatheroma, ThCFAM thick-cap fibroatheroma with macrophage/lymphocyte infiltration in cap, TCFA thin-cap fibroatheroma, FC fibrocalcific plaque, FT fibrotic tissue, LFA lipid-rich core of fibroatheroma, SN sensitivity, SP specificity, PPV positive predictive value, IVUS intravascular ultrasound, FLIm fluorescence lifetime imaging, NaN not a number (corresponds to division by zero)