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Crohn's disease. Pilot study comparing MRI of the abdomen with clinical evaluation
U Kettritz1, K Isaacs, D M Warshauer
1Department of Radiology and Gastroenterology, University of North Carolina at Chapel Hill 27599-7510, USA.
Abstract:
Fourteen patients underwent magnetic resonance imaging (MRI) examination (16 studies) and clinical evaluation concurrently. MRI studies included gadolinium enhancement and TI-weighted fat-suppressed spin echo. Separate investigators determined the severity of disease on MR images and on clinical evaluation in a blinded fashion. MRI studies were evaluated for percentage of mural contrast enhancement, wall thickness, and length of diseased bowel. An MR product was generated using these parameters. Clinical evaluation used the Crohn's Disease Activity Index (CDAI) and modified Index of the International Organization for the Study of Inflammatory Bowel Disease (IOIBD). Linear correlation was found between the MR product and clinical indexes of disease activity. The correlation between MR product and the modified IOIBD index was statistically significant (R(2) = 0.633, p = 0.0012). The correlation of MR product and CDAI was less close (R(2) = 0.274, p = 0.0373). Among individual MR parameters, length of diseased bowel showed the greatest correlation with CDAI (R(2) = 0.537, p = 0.012). Percentage contrast enhancement and bowel wall thickness showed significant correlation to the modified IOIBD index (R(2) = 0.739, p = 0.021) but not to the CDAI (R(2) = 0.004, p = 0.825). The results of this study show that the product of mural contrast enhancement, wall thickness, and length of diseased bowel correlated with clinical indexes of disease activity in Crohn's disease. Our findings suggest that MRI may be useful in evaluating the severity of Crohn's disease and may provide information complementary to clinical evaluation.
Insights
Magnetic resonance imaging (MRI) can assess Crohn's disease severity. A combined MRI metric correlated significantly with clinical disease activity indexes, suggesting MRI's complementary role in patient evaluation.
Area of Science:
- Gastroenterology
- Radiology
- Medical Imaging
Background:
- Crohn's disease is a chronic inflammatory bowel disease.
- Accurate assessment of disease severity is crucial for effective management.
- Current clinical evaluation methods have limitations in objectively quantifying disease activity.
Purpose of the Study:
- To evaluate the correlation between magnetic resonance imaging (MRI) parameters and clinical disease activity indexes in Crohn's disease.
- To determine if a combined MRI metric can accurately reflect disease severity.
- To explore the utility of MRI as a complementary tool for Crohn's disease assessment.
Main Methods:
- Fourteen patients with Crohn's disease underwent concurrent MRI and clinical evaluations.
- MRI included gadolinium enhancement and TI-weighted fat-suppressed sequences.
- Disease severity was assessed using the Crohn's Disease Activity Index (CDAI) and a modified IOIBD index, blinded to MRI findings.
Main Results:
- A product of MRI parameters (contrast enhancement, wall thickness, bowel length) showed linear correlation with clinical indexes.
- The MR product significantly correlated with the modified IOIBD index (R(2) = 0.633, p = 0.0012).
- Individual MRI parameters like bowel length correlated with CDAI, while contrast enhancement and wall thickness correlated with the modified IOIBD index.
Conclusions:
- The combined MRI metric shows promise in objectively quantifying Crohn's disease severity.
- MRI findings correlate with established clinical measures of disease activity.
- MRI may serve as a valuable, complementary tool to clinical evaluation in managing Crohn's disease.