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. 2020 Apr;45(4):1011-1017.
doi: 10.1007/s00261-020-02407-8.

Computed tomography and magnetic resonance enterography protocols and techniques: survey of the Society of Abdominal Radiology Crohn's Disease Disease-Focused Panel

Namita S Gandhi  1 , Jonathan R Dillman  2 , David J Grand  3 , Chenchan Huang  4 , Joel G Fletcher  5 , Mahmoud M Al-Hawary  6 , Sudha A Anupindi  7 , Mark E Baker  8 , David H Bruining  9 , Manjil Chatterji  10 , Jeff L Fidler  5 , Michael S Gee  11 , Joseph R Grajo  12 , Flavius F Guglielmo  13 , Tracy A Jaffe  14 , Seong Ho Park  15 , Jordi Rimola  16 , Bachir Taouli  17 , Stuart A Taylor  18 , Benjamin Yeh  19
Affiliations

Computed tomography and magnetic resonance enterography protocols and techniques: survey of the Society of Abdominal Radiology Crohn's Disease Disease-Focused Panel

Namita S Gandhi et al. Abdom Radiol (NY). 2020 Apr.

Abstract

Purpose: To survey Society of Abdominal Radiology Crohn's Disease (CD) Disease-Focused Panel (DFP) members to understand state-of-the-art CT/MR enterography (CTE/MRE) protocols and variability between institutions.

Methods: This study was determined by an institutional review board to be "exempt" research. The survey consisted of 70 questions about CTE/MRE patient preparation, administration of contrast materials, imaging techniques, and other protocol details. The survey was administered to DFP members using SurveyMonkey® (Surveymonkey.com). Descriptive statistical analyses were performed.

Results: Responses were received from 16 DFP institutions (3 non-USA, 2 pediatric); 15 (94%) were academic/university-based. 10 (63%) Institutions image most CD patients with MRE; 4 (25%) use CTE and MRE equally. Hypoperistaltic medication is given for MRE at 13 (81%) institutions versus only 2 (13%) institutions for CTE. Most institutions have a technologist or nurse monitor oral contrast material drinking (n = 12 for CTE, 75%; n = 11 for MRE, 69%). 2 (13%) institutions use only dual-energy capable scanners for CTE, while 9 (56%) use either a single-energy or dual-energy scanner based on availability. Axial CTE images are reconstructed at 2-3 mm thickness at 8 (50%) institutions, > 3 mm at 5 (31%), and < 2 mm at 3 (19%) institutions. 13 (81%) institutions perform MRE on either 1.5 or 3T scanners without preference. All institutions perform MRE multiphase postcontrast imaging (median = 4 phases), ranging from 20 to 600 s after contrast material injection.

Conclusion: CTE and MRE protocol knowledge from DFP institutions can help radiology practices optimize/standardize protocols, potentially improving image quality and patient outcomes, permitting objective comparisons between examinations, and facilitating research.

Keywords: CT enterography; Crohn’s Disease-Focused Panel; Crohn’s disease; MR enterography.

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