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Thomsen et al: Computed tomography scan accuracy for the prediction of lobe and division of liver tumors by four board-certified radiologists
Veterinary Surgery 7, 2024

🔍 Key Findings

  • CT localization of liver masses was more accurate by division (88%) than by lobe (74.3%)
  • Inter-radiologist agreement was excellent for division (kappa up to 0.885) and only moderate–good for lobe
  • Quadrate and right lateral lobes had significantly lower localization accuracy compared to left lateral or medial lobes
  • CT localization of the left division was most accurate (90.1%) compared to central (77.1%) and right (88.3%)
  • Portal and hepatic venous phases were equally helpful for localization (each ~30–38% usefulness)
  • No significant associations found between histopathologic diagnosis and localization accuracy
  • Lobe-level CT localization should be interpreted with caution, especially for the quadrate and right lateral lobes
  • Radiologist experience likely influenced accuracy, with the most experienced radiologist performing best

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← Articles

Thomsen et al: Computed tomography scan accuracy for the prediction of lobe and division of liver tumors by four board-certified radiologists
Veterinary Surgery 7, 2024

🔍 Key Findings

  • CT localization of liver masses was more accurate by division (88%) than by lobe (74.3%)
  • Inter-radiologist agreement was excellent for division (kappa up to 0.885) and only moderate–good for lobe
  • Quadrate and right lateral lobes had significantly lower localization accuracy compared to left lateral or medial lobes
  • CT localization of the left division was most accurate (90.1%) compared to central (77.1%) and right (88.3%)
  • Portal and hepatic venous phases were equally helpful for localization (each ~30–38% usefulness)
  • No significant associations found between histopathologic diagnosis and localization accuracy
  • Lobe-level CT localization should be interpreted with caution, especially for the quadrate and right lateral lobes
  • Radiologist experience likely influenced accuracy, with the most experienced radiologist performing best

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Multiple Choice Questions on this study

In Thomsen 2024 et al., on CT accuracy for liver tumors, what level of inter-rater agreement (kappa) was reported for liver division localization?

A. Fair
B. Moderate
C. Good
D. Excellent
E. Poor

Answer: Excellent

Explanation: Kappa values were as high as 0.885, indicating excellent agreement among radiologists for division-level localization.
In Thomsen 2024 et al., on CT accuracy for liver tumors, CT accuracy was NOT significantly influenced by which of the following?

A. Lobe location
B. Division
C. Contrast phase
D. Histopathologic diagnosis
E. Radiologist experience

Answer: Histopathologic diagnosis

Explanation: No statistical link was found between tumor type and localization accuracy.
In Thomsen 2024 et al., on CT accuracy for liver tumors, which phase of contrast-enhanced CT was most helpful in localization?

A. Portal phase only
B. Hepatic venous phase only
C. Arterial phase
D. Delayed equilibrium phase
E. Both portal and hepatic venous

Answer: Both portal and hepatic venous

Explanation: Both were reported as useful in roughly 30–38% of cases.
In Thomsen 2024 et al., on CT accuracy for liver tumors, which liver lobes showed significantly lower CT localization accuracy?

A. Left medial and quadrate
B. Quadrate and right lateral
C. Right medial and caudate
D. Left lateral and right medial
E. Quadrate and caudate

Answer: Quadrate and right lateral

Explanation: These lobes were significantly more prone to localization errors.
In Thomsen 2024 et al., on CT accuracy for liver tumors, which anatomical level had the highest accuracy?

A. Liver lobe
B. Histologic subtype
C. Portal vein branch
D. Liver division
E. Hepatic artery territory

Answer: Liver division

Explanation: Accuracy was 88% when localizing by division, compared to 74.3% at the lobe level.

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