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Cirrhosis: modified caudate-right lobe ratio
Hitomi Awaya1, Donald G Mitchell, Tamotsu Kamishima
1Department of Radiology, Thomas Jefferson University Hospital, 132 S 10th St, 1096 Main Bldg, Philadelphia, PA 19107, USA.
Radiology
|August 31, 2002
Summary
A new magnetic resonance imaging measurement, the caudate-right lobe ratio using the right portal vein (C/RL-r), more accurately diagnoses cirrhosis and assesses its severity compared to the standard method (C/RL-m). This finding improves diagnostic capabilities for liver disease.
Area of Science:
- Radiology and Medical Imaging
- Hepatology
- Diagnostic Accuracy
Background:
- Cirrhosis diagnosis and severity assessment are crucial in liver disease management.
- Existing imaging ratios have limitations in diagnostic performance.
- The caudate-right lobe ratio (C/RL) is an established imaging marker.
Purpose of the Study:
- To compare the diagnostic accuracy of a modified caudate-right lobe ratio using the right portal vein (C/RL-r) against the standard method using the main portal vein (C/RL-m).
- To evaluate the efficacy of C/RL-r in assessing the clinical severity of cirrhosis.
Main Methods:
- Magnetic resonance (MR) imaging was performed on 236 patients (121 with cirrhosis, 115 controls).
- Two observers independently measured C/RL-r and C/RL-m.
- Receiver operating characteristic (ROC) curves and accuracy metrics were used for comparison.
Main Results:
- C/RL-r demonstrated a significantly greater area under the ROC curve (0.797) than C/RL-m (0.731; P =.040).
- At a threshold of C/RL-r > 0.90, sensitivity, specificity, and accuracy for cirrhosis diagnosis were 71.7%, 77.4%, and 74.2%, respectively.
- C/RL-r showed significant differences across Child-Pugh classes (P =.0105), unlike C/RL-m.
Conclusions:
- The modified caudate-right lobe ratio using the right portal vein (C/RL-r) is more accurate for diagnosing cirrhosis.
- C/RL-r also proves superior in evaluating the clinical severity of cirrhosis compared to the C/RL-m method.