Virtual nonenhanced abdominal dual-energy MDCT: Analysis of image characteristics

Figure 2 A 60-year-old male with an abdominal aortic aneurysm. A: Regular nonenhanced image demonstrates a curved calcification in the posterior border of the aneurysm with some smaller calcifications in the anterior border; B: The contrast enhanced image shows opacification of the lumen; C: Virtual nonenhanced shows preserved posterior calcifications with deletion of the smaller anterior calcifications.