Fig. 4

Examples of abdominal aortic aneurysm growth. a–c A patient with aneurysm expansion. d–f A patient with a shrunken aneurysm. a Maximal axial plane of the aneurysm (the blue area). b Body composition segmentation results of image a. c Pseudocolor image of the total muscle region (intramuscular fat and pure muscle). The red area reflects the high CT value, and the blue reflects the low value (Hounsfield Unit). d–f represent the same meaning as a–c