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 (MAVC) and mean attenuation value changes between 100 keV and 40 keV (MAVC) were calculated.
Results: The CT image parameters of all 46 patients with GB polyps were analyzed. There were significant differences in MAVC and MAVC between cholesterol and adenomatous polyps ( <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.
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