Dual-energy-CT of hypervascular liver lesions in patients with HCC: investigation of image quality and sensitivity.

Autor: Altenbernd J, Heusner TA, Ringelstein A, Ladd SC, Forsting M, Antoch G, Altenbernd, Jens, Heusner, Till A, Ringelstein, Adrian, Ladd, Susanne C, Forsting, Michael, Antoch, Gerald
Zdroj: European Radiology; Apr2011, Vol. 21 Issue 4, p738-743, 6p
Abstrakt: Objective: To investigate dual-energy CT of hypervascular liver lesions in patients with HCC.Methods: Forty patients with hepatocellular carcinomas were investigated with abdominal dual-energy CT. In each patient unenhanced and contrast-enhanced imaging with arterial und portovenous delay were performed. Hypervascular lesions were documented on arterial phase 80-kVp images, 140-kVp images, and the averaged arterial images by two radiologists. Subjective image quality (5-point scale, from 5 [excellent] to 1 [not interpretable]) was rated on all images.Results: The mean number of hypervascular HCC lesions detected was 3.37 ± 1.28 on 80-kVp images (p < 0.05), 1.43 ± 1.13 on 140-kVp images (p < 0.05), and 2.57 ± 1.2 on averaged images. The image quality was 0.3 ± 0.5 for 80-kVp (p < 0.05), 1.6 ± 0.5 for 140-kVp (p < 0.05) and 3.2 ± 0.4 for the averaged images.Conclusion: Low-kVp images of dual-energy datasets are more sensitive in detecting hypervascular liver lesions. However, this increase in sensitivity goes along with a decrease in the subjective image quality of low-kVp images. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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