Fig. 2.

The m-CT values were −682 ± 64 HU (range) for AAH lesions, −544 ± 179 (range) for Type A lesions, −496 ± 147 (range) for Type B lesions, and −371 ± 142 (range) for invasive lesions. AAH lesions had a significantly lower m-CT value than Type B lesions. AAH, Type A, and Type B lesions had a significantly lower m-CT values than invasive lesions (p < 0.05). No significant differences in m-CT values were observed between AAH and Type A lesions or between Type A and Type B lesions. The m-CT value of AAH lesions were all ≤−600 HU, while most of the m-CT values of invasive lesions were >−600 HU