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Table 1: Summary of attenuation values
Type of Tissue N Mean HU SD Median 2.5–97.5 Percentiles Normal Distribution
Basal 
    Fibrous 47 91.66 17.7474 93 47.525–121.400 0.0052
    LRNC 63 39.476 19.4529 34 16.075–87.625 0.0355
    IPH 59 17.475 4.9283 17 8.975–26.025 0.0668
Contrast 
    Fibrous 47 93.128 16.3609 94 49.875–120.775 0.0003
    LRNC 63 48.048 19.3811 43 21.000–85.925 0.1446
    IPH 59 18.407 4.8428 18 10.975–27.000 0.0021

Type of Tissue	N	Mean HU	SD	Median	2.5–97.5 Percentiles	Normal Distribution
Basal
Fibrous	47	91.66	17.7474	93	47.525–121.400	0.0052
LRNC	63	39.476	19.4529	34	16.075–87.625	0.0355
IPH	59	17.475	4.9283	17	8.975–26.025	0.0668
Contrast
Fibrous	47	93.128	16.3609	94	49.875–120.775	0.0003
LRNC	63	48.048	19.3811	43	21.000–85.925	0.1446
IPH	59	18.407	4.8428	18	10.975–27.000	0.0021