Clinical value of spectral CT in diagnosis of negative gallstones and common bile duct stones

Abdominal Imaging
Huanguo LiLongxia Chen

Abstract

To investigate the clinical value of spectral CT in diagnosis of negative gallstones and common bile duct stones primarily. All patients diagnosed with negative biliary stones were analyzed and examined by spectral CT scanner retrospectively. Based on acquired raw imaging data, image series were reconstructed as described below: the optimal contrast-to-noise ratio monochromatic energy images, calcium- and fat- based material decomposition images and spectral curve images. All these imaging series were analyzed quantitatively and qualitatively. The contrast between negative stones and adjacent bile was 6.87 ± 5.48 HU on hybrid energy CT images and 47.30 ± 24.05 HU on optimal monochromatic energy CT images. The mean concentration of calcium in bile and negative stones was 19.36 ± 5.12 and 3.88 ± 6.60 mg/mL, and the fat in bile and negative stones was 998.48 ± 11.79 and 1035.68 ± 15.36 mg/mL. Effective atomic number Z of negative stones (6.60 ± 0.45) was lower than that of bile (7.65 ± 0.13). The slopes of the spectral curves for negative stones were k 90-40KeV = 1.43 ± 0.63 and k 140-90KeV = 0.19 ± 0.08, and for bile, they were k 90-40KeV = -0.27 ± 0.09 and k 140-90KeV = -0.04 ± 0.01. The same stone showed different densities in ...Continue Reading

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Citations

Dec 1, 2017·Emergency Radiology·Gopal V Punjabi
Jan 9, 2019·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Nicolas MurraySavvas Nicolaou
Jul 1, 2017·Abdominal Radiology·Jennifer W UyedaAaron D Sodickson

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