Usefulness of contrast-enhanced computed tomography for diagnosing hepatic steatosis

Authors

  • Thipsumon Tangsiwong Buddhachinaraj Phitsanulok Hospital, Phitsanulok, Thailand and Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
  • Thitinan Chulroek Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand

Keywords:

Hepatic steatosis, fatty liver, contrast-enhanced computed tomography, focal fat sparing

Abstract

Background: The diagnosis of hepatic steatosis has been well-described on unenhanced computed tomography (UECT) study. However, current UECT often discarded from the abdominal CT protocol due to radiation dose reduction.

Objective: To determine accuracy of contrast-enhanced CT (CECT) for diagnosis of hepatic steatosis.

Methods: A total of 1,001 patients who underwent unenhanced and portal venous phase abdominal CT studies were assessed by using region-of-interests of liver and spleen, and visual detection of focal fat sparing. UECT diagnostic criteria were used as the standard reference.

Results: The optimal cut-offs on CECT images were 110 Hounsfield unit (HU) of liver attenuation and -20 HU of liver-splenic differential (L-S) attenuation. Sensitivity, specificity, accuracy and receiver operating characteristic curve areas for quantitative liver attenuation values were 90.4%, 73.6%, 75.9% and 0.926, respectively; and for L-S attenuation values were 83.1%, 70.8%, 72.5% and 0.856, respectively. Qualitatively, geographic fat sparing was 100.0% specificity; however, its sensitivity (50.7%) was rather low.

Conclusion: Portal venous phase CECT can be used for detection of hepatic steatosis in abdominal CECT study without the preceding unenhanced phase.

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Published

2023-07-20

How to Cite

1.
Tangsiwong T, Chulroek T. Usefulness of contrast-enhanced computed tomography for diagnosing hepatic steatosis. Chula Med J [Internet]. 2023 Jul. 20 [cited 2024 Nov. 6];65(4). Available from: https://he05.tci-thaijo.org/index.php/CMJ/article/view/169