Table 1 Summary values of attenuation (measured in HU) of the ROIs before and after administration of contrast medium (with the Standard Deviation)
From: Carotid artery intra-plaque attenuation variability using computed tomography
Mean | SD | Minimum | Maximum | 2.5–97.5 P | Normal Distr. | |
|---|---|---|---|---|---|---|
ROI 1 basal | 33.818 | 11.0074 | 14 | 49 | 14.000–49.000 | 0.3899 |
ROI 1 contrast | 40.273 | 9.1879 | 24 | 51 | 24.000–51.000 | 0.6966 |
ROI 2 basal | 41.364 | 7.5534 | 28 | 52 | 28.000–52.000 | 0.5753 |
ROI 2 contrast | 51.273 | 10.2868 | 31 | 62 | 31.000–62.000 | 0.0512 |
ROI 3 basal | 41.909 | 11.5884 | 27 | 57 | 27.000–57.000 | 0.0872 |
ROI 3 contrast | 56.273 | 13.8859 | 31 | 72 | 31.000–72.000 | 0.3031 |
ROI 4 basal | 49.273 | 20.7079 | 28 | 99 | 28.000–99.000 | 0.0254 |
ROI 4 contrast | 68.818 | 19.0778 | 43 | 101 | 43.00–101.000 | 0.8457 |
SD ROI 1 basal | 7.545 | 2.1616 | 5 | 11 | 5.000–11.000 | 0.5274 |
SD ROI 1 contrast | 10.364 | 4.081 | 5 | 20 | 5.000–20.000 | 0.0547 |
SD ROI 2 basal | 11.818 | 4.3547 | 4 | 17 | 4.000–17.000 | 0.6073 |
SD ROI 2 contrast | 17.091 | 9.7719 | 5 | 34 | 5.000–34.000 | 0.6494 |
SD ROI 3 basal | 7.909 | 2.0226 | 5 | 11 | 5.000–11.000 | 0.3265 |
SD ROI 3 contrast | 10.091 | 4.6574 | 4 | 18 | 4.000–18.000 | 0.6571 |
SD ROI 4 basal | 10.455 | 4.5905 | 5 | 20 | 5.000–20.000 | 0.5176 |
SD ROI 4 contrast | 15.545 | 6.1703 | 9 | 25 | 9.000–25.000 | 0.157 |