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CC BY-NC-ND 4.0 · Rofo 2022; 194(10): 1119-1131
DOI: 10.1055/a-1826-0049
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MR Enterography in Crohnʼs Disease: Comparison of Contrast Imaging with Diffusion-weighted Imaging and a special Form of Color Coding

Article in several languages: English | deutsch
Maja Jakob
1   Molecular Oncology, Robert Bosch Hospital, Stuttgart, Germany
,
Maik Backes
2   Radiology, Robert Bosch Hospital, Stuttgart, Germany
,
Christian Schaefer
3   Gastroenterology, Robert Bosch Hospital, Stuttgart, Germany
,
Joerg Albert
3   Gastroenterology, Robert Bosch Hospital, Stuttgart, Germany
,
Angela Geissler
2   Radiology, Robert Bosch Hospital, Stuttgart, Germany
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Erratum: MR-Enterografie bei Morbus Crohn: Vergleich der Kontrastbildgebung mit diffusionsgewichteter Bildgebung und einer besonderen Form der FarbcodierungRofo 2022; 194(10): e2-e2
DOI: 10.1055/a-1918-8351

Abstract

Purpose

We compared contrast-enhanced MR enterography with diffusion-weighted sequences to evaluate the validity of diffusion-weighted sequences for activity assessment in Crohnʼs disease compared to endoscopy. In addition, we investigated a new color-coded image post-processing technique in comparison with standard sequences and endoscopy.

Materials and Methods

Included were 197 MR enterographies (2015–2017) performed by using standardized examination protocols. The intestine was divided into 7 segments, which were compared separately. The accuracy of the MR examinations with regard to disease activity was validated using the Seo and MaRIA score and endoscopy findings. In addition, the image data were post-processed using a color-coded evaluation method (DCE tool on OsiriX).

Results

The comparison between contrast-enhanced and diffusion-weighted sequences showed a highly significant correlation for all bowel sections with a mean Spearman correlation coefficient of 0.876 (0.809–0.928). The color-coded image post-processing showed a sensitivity of 83.2 % and a specificity of 70.5 % in comparison with the MaRIA score. In comparison to endoscopy, a sensitivity of 81.3 % and a specificity of 70.5 %. In comparison with endoscopy, the MaRIA score showed a sensitivity of 80.2 % and a specificity of 84.0 % at a cut-off of 7. The visual score according to Seo showed a sensitivity of 85.7 % with a specificity of 77.0 % in the contrast-weighted examination and a sensitivity of 87.9 % and a specificity of 71.8 % for diffusion weighted images.

Conclusion

Diffusion-weighted sequences are as good as contrast-weighted sequences for assessing inflammatory activity in Crohnʼs disease. Contrast is often helpful for assessing complications, but this was not the purpose of this study. Visual imaging using color-coded data sets was similarly good at detecting inflammation.

Key points:

  • MR enterography is possible without contrast using diffusion-weighted imaging with comparable high informative value.

  • Inflammatory activity in MR correlates sufficiently well with endoscopy

  • The MaRIA and Seo scores are comparable in their validity.

  • The colored representation of inflamed bowel sections is a promising technique.

Citation Format

  • Jakob M, Backes M, Schaefer C et al. MR Enterography in Crohnʼs Disease: Comparison of Contrast Imaging with Diffusion-weighted Imaging and a special Form of Color Coding. Fortschr Röntgenstr 2022; 194: 1119 – 1131

Key words

MR enterography - MR-diffusion/perfusion - inflammation bowel - color coding - MaRia Score

Supplement

Supplement



Publication History

Received: 11 June 2021

Accepted: 16 March 2022

Article published online:
15 June 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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