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