ESR Essentials: diagnosis and assessment of treatment response in patients with luminal Crohn's disease-practice recommendations by the European Society of Gastrointestinal and Abdominal Radiology.

The European Society of Gastrointestinal and Abdominal Radiology (ESGAR) presents an ESR Essentials review article on Crohn's disease (CD) diagnosis and treatment response assessment. The focus is on luminal disease, particularly in the small bowel, and to a lesser degree, the colon. Magnetic Resonance Enterography (MRE) and ultrasound are typically the first-line radiological investigations for known or suspected luminal CD.

Inter- and intra-observer variability of software quantified bowel motility measurements of small bowel Crohn's disease: findings from the MOTILITY trial.

Objectives: Motility magnetic resonance imaging (mMRI) is a potential marker of disease activity of small bowel Crohn's disease (SBCD), but there is limited data on its reproducibility. We assessed inter- and intra-observer agreement of small bowel motility as part of a prospective multicentre trial investigating whether mMRI can predict longer-term response to biologic therapy in active, non-stricturing SB-CD (MOTILITY Trial).

Methods: 297 segmental small bowel motility scores from 104 SBCD patients (mean age 38.

Magnetic resonance enterography to predict subsequent disabling Crohn's disease in newly diagnosed patients (METRIC-EF)-multivariable prediction model, multicentre diagnostic inception cohort.

Objectives: Magnetic resonance enterography (MRE) is a first-line investigation to diagnose Crohn's disease (CD), but its role for prognostication is unknown. Accordingly, we assessed the predictive ability of prognostic models including MRE scores (MRE Global Score (MEGS), simplified MR Index of Activity (sMARIA), and Lémann index (LI)) against models using clinical predictors alone for the development of modified Beaugerie disabling CD (MBDD) within 5 years of diagnosis.

Methods: This was a multicentre, diagnostic inception cohort of patients with newly diagnosed CD across 9 UK hospitals, followed for 4 years or more.

MRI assessment of body composition for prediction of therapeutic response to biologic agents in patients with Crohn's disease.

Objectives: Altered body fat and muscle mass in Crohn's disease (CD) have been linked to adverse disease course and outcomes. Prediction of treatment response or remission (RoR) of small bowel CD (SBCD) to biologic therapy remains challenging. We aimed to establish the prognostic value of body composition parameters measured using MR enterography (MRE) for RoR at 1 year in patients with SBCD commencing biologic therapy.

Small Bowel Motility Quantified by Cine MRI to Predict Longer-Term Response in Patients with Crohn's Disease Commencing Biological Therapy: The Motility Study.

Background: Small bowel Crohn's disease (SBCD) is increasingly treated with biological therapies. Predicting response or remission (RoR) for individual patients is difficult and complicates treatment strategy. We aimed to determine if motility magnetic resonance imaging (mMRI) is superior to CRP and fecal calprotectin (FC) for the prediction of RoR at 1 year in patients commencing biologics for SBCD.

How I Do It: Cross-sectional Imaging in Small-Bowel Crohn Disease and Ulcerative Colitis.

Cross-sectional imaging, especially MR enterography (MRE) and intestinal US, plays an increasingly important role in the diagnosis and monitoring of Crohn disease. In this article, the authors share their approach to imaging Crohn disease, drawing on their clinical and research experience. They consider how to select the most appropriate modality for different clinical indications and discuss technical aspects to maximize diagnostic accuracy.

Diffusion-weighted imaging to predict longer-term response in Crohn's disease patients commencing biological therapy: results from the MOTILITY trial.

Objectives: Predicting longer-term response to biological therapy for small bowel Crohn's disease (SBCD) is an unmet clinical need. Diffusion-weighted magnetic resonance (MR) imaging (DWI) may indicate disease activity, but its predictive ability, if any, is unknown. We investigated the prognostic value of DWI for 1 year response or remission (RoR) in SBCD patients commencing biologic therapy, including incremental value over C-reactive protein (CRP) and faecal calprotectin (FC).

Volumetric measurement of terminal ileal Crohn's disease by magnetic resonance enterography: a feasibility study.

Objectives: Magnetic resonance enterography (MRE) interpretation of Crohn's disease (CD) is subjective and uses 2D analysis. We evaluated the feasibility of volumetric measurement of terminal ileal CD on MRE compared to endoscopy and sMARIA, and the responsiveness of volumetric changes to biologics.

Methods: CD patients with MRE and contemporaneous CD endoscopic index of severity-scored ileocolonoscopy were included.

Small bowel imaging in inflammatory bowel disease: updates for 2023.

Introduction: Cross-sectional imaging techniques including MR and CT enterography and ultrasound are integral to Crohn's disease management, accurate, responsive, and well tolerated. They assess the full thickness of the bowel wall, perienteric environment, and distant complications. As we strive toward tighter disease control, imaging's role will expand further with transmural healing becoming an increasingly important therapeutic target.

Meta-research: How many diagnostic or prognostic models published in radiological journals are evaluated externally?

Objectives: Prognostic and diagnostic models must work in their intended clinical setting, proven via "external evaluation", preferably by authors uninvolved with model development. By systematic review, we determined the proportion of models published in high-impact radiological journals that are evaluated subsequently.

Methods: We hand-searched three radiological journals for multivariable diagnostic/prognostic models 2013-2015 inclusive, developed using regression.

Imaging in whole organ pancreatic transplants and a multimodality review of its complications.

This pictorial review will describe the normal anatomy of whole organ pancreatic transplants and the common surgical variants with which the radiologist should be familiar. Complications may be divided into (1) vascular: arterial occlusion and stenosis, venous thrombosis, pseudoaneurysms and arteriovenous fistulae, (2) parenchymal complications such as pancreatitis and the variety of peripancreatic collections, and (3) enteric complications including leak and fistula formation. The radiologist plays a crucial role in the initial assessment of graft anatomy and perfusion, prompt diagnosis, and increasingly, in the management of complications.

Pictorial review of whole body MRI in myeloma: emphasis on diffusion-weighted imaging.

There have been major advances in myeloma imaging over the past few years with focal lesions on imaging now forming part of the disease defining criteria. Whole body diffusion-weighted MRI (WB-MRI) is considered the most sensitive technique for the detection of focal active lesions. This pictorial review will focus on imaging the spectrum of myelomatous disorders on WB-MRI including diffusion and Dixon sequences.

Correction to: The clinical utility of prostate cancer heterogeneity using texture analysis of multiparametric MRI.

Unfortunately, in the original article one co-author's name is missing. The co-author name and affiliation is given as follows.

The clinical utility of prostate cancer heterogeneity using texture analysis of multiparametric MRI.

Purpose: To determine if multiparametric MRI (mpMRI) derived filtration-histogram based texture analysis (TA) can differentiate between different Gleason scores (GS) and the D'Amico risk in prostate cancer.

Methods: We retrospectively studied patients whose pre-operative 1.5T mpMRI had shown a visible tumour and who subsequently underwent radical prostatectomy (RP).

Muscle mania: the quest for the perfect body.

We describe the case of a young man with repeated hospital presentations for a variety of symptoms related to excessive bodybuilding and associated behaviours. He presented to our department (radiology) with right arm pain and loss of function. Ultrasound showed complete triceps rupture, rare in young patients and multiple cystic areas within the muscles of the arm.