Background Dual-energy computed tomography (DE-CT) scans were acquired to identify cholesterol and adenomatous gallbladder (GB) polyps, which have not been well evaluated before surgery. Purpose To evaluate the DE-CT findings of GB polyps 1.0–2.0 cm in size and differentiate between cholesterol and adenomatous polyps. Material and Methods Forty-six patients with GB polyps were surgically treated from December 2017 to December 2019 and divided into two groups according to their postoperative pathologic results: a cholesterol group with 26 patients and an adenomatous group with 20 patients. All of these patients underwent DE-CT imaging with tube voltages of 80 kVp and 140 kVp within two weeks before surgery. Mean attenuation values were measured for every GB polyp at 80/140 kVp and at 40/140 keV. The mean attenuation value changes between 140 kVp and 80 kVp (MAVC140–80 kVp) and mean attenuation value changes between 100 keV and 40 keV (MAVC100–40 keV) were calculated. Results The CT image parameters of all 46 patients with GB polyps were analyzed. There were significant differences in MAVC140–80 kVp and MAVC100–40 keV between cholesterol and adenomatous polyps ( P <0.05); these values were positive for cholesterol polyps and negative for adenomatous polyps. Conclusion The unique energy spectrum information provided by DE-CT scans is helpful in differentiating between cholesterol and adenomatous polyps 1.0–2.0 cm in size.
Deep Learning Electronic Cleansing for Single- and Dual-Energy CT Colonography