Gadolinium-Free Crohn's Disease Assessment from Magnetic Resonance Enterography Data

Yaniv Ziselman, Faten Hajali Shinnawi, Mary Louise Greer, Gili Focht, Dan Turner, Moti Freiman

פרסום מחקרי: פרק בספר / בדוח / בכנספרסום בספר כנסביקורת עמיתים

תקציר

Magnetic resonance enterography (MRE) based indices are used to assess the severity of Crohn's disease (CD) in patients. Manual calculation of these indices by radiologists is both time consuming and subject to bias. Specifically, terminal-ileum (TI) wall-thickening is challenging to estimate, especially from gadolinium-free T2-weighted MRI data. We present a machine-learning-based system to automatically segment the TI and classify wall-thickening from T2-weighted MRE data. We introduce an anatomically-constrained U-net segmentation model to cope with the inherently heterogeneous appearance, large anatomical variability and limited availability of data for TI segmentation from MRE data. We evaluated the added-value of our anatomically-constrained segmentation model on 180 T2-weighted MRE scans collected as part of the ImageKids study using k-fold cross-validation experimental setup. The anatomically-constrained segmentation model improved segmentation results compared to a vanilla U-Net by means of both Dice score and Housdorff distance (17.931mm vs. 19.97mm, p<0.05). We used histogram-based features with an SVM classifier to distinguish between patients with and without TI high wall thickness (> 8mm vs. < 3mm, N=18). Leave-one-out experimental demonstrated high agreement with the radiologists' assessment (F1 score of 0.933 and a Cohen's kappa score of 0.6). The proposed approach has the potential to facilitate objective assessment of CD from MRE data.

שפה מקוריתאנגלית
כותר פרסום המארחISBI 2022 - Proceedings
כותר משנה של פרסום המארח2022 IEEE International Symposium on Biomedical Imaging
עמודים1-5
מספר עמודים5
מסת"ב (אלקטרוני)9781665429238
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 28 מרץ 2022
אירוע19th IEEE International Symposium on Biomedical Imaging, ISBI 2022 - Kolkata, הודו
משך הזמן: 28 מרץ 202231 מרץ 2022

סדרות פרסומים

שםProceedings - International Symposium on Biomedical Imaging
כרך2022-March

כנס

כנס19th IEEE International Symposium on Biomedical Imaging, ISBI 2022
מדינה/אזורהודו
עירKolkata
תקופה28/03/2231/03/22

ASJC Scopus subject areas

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  • ???subjectarea.asjc.2700.2741???

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