Evidence map›Paper›PMID 28401775›Full record

ArticleThe British journal of radiology2017

Semi-automatic bowel wall thickness measurements on MR enterography in patients with Crohn's disease.

Robiel E Naziroglu, Carl A J Puylaert, Jeroen A W Tielbeek, Jesica Makanyanga, Alex Menys, Cyriel Y Ponsioen, Haralambos Hatzakis, Stuart A Taylor, Jaap Stoker, Lucas J van Vliet and 1 more

Open access · greenAbstract read
In one paragraph

Article in The British journal of radiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.5field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed, 29 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 5 institutions in 2 countries.

Robiel E Naziroglu1 Department of Imaging Physics, Delft University of Technology, Delft, Netherlands.
Carl A J Puylaert2 Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
Jeroen A W Tielbeek2 Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
Jesica Makanyanga3 Center for Medical Imaging, University College London, London, UK.
Alex Menys3 Center for Medical Imaging, University College London, London, UK.
Cyriel Y Ponsioen2 Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
Haralambos Hatzakis4 Biotronics3D Inc., London, UK.
Stuart A Taylor3 Center for Medical Imaging, University College London, London, UK.
Jaap Stoker2 Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
Lucas J van Vliet1 Department of Imaging Physics, Delft University of Technology, Delft, Netherlands.
Frans M Vos1 Department of Imaging Physics, Delft University of Technology, Delft, Netherlands.
Academic Medical Center · NLUniversity College London · GBDelft University of Technology · NLUniversity of Amsterdam · NLBiotronics 3D (United Kingdom) · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo evaluate a semi-automatic method for delineation of the bowel wall and measurement of the wall thickness in patients with Crohn's disease.

methods53 patients with suspected or proven Crohn's disease were selected. Two radiologists independently supervised the delineation of regions with active Crohn's disease on MRI, yielding manual annotations (Ano1, Ano2). Three observers manually measured the maximal bowel wall thickness of each annotated segment. An active contour segmentation approach semi-automatically delineated the bowel wall. For each active region, two segmentations (Seg1, Seg2) were obtained by independent observers, in which the maximum wall thickness was automatically determined. The overlap between (Seg1, Seg2) was compared with the overlap of (Ano1, Ano2) using Wilcoxon's signed rank test. The corresponding variances were compared using the Brown-Forsythe test. The variance of the semi-automatic thickness measurements was compared with the overall variance of manual measurements through an F-test. Furthermore, the intraclass correlation coefficient (ICC) of semi-automatic thickness measurements was compared with the ICC of manual measurements through a likelihood-ratio test.

resultsPatient demographics: median age, 30 years; interquartile range, 25-38 years; 33 females. The median overlap of the semi-automatic segmentations (Seg1 vs Seg2: 0.89) was significantly larger than the median overlap of the manual annotations (Ano1 vs Ano2: 0.72); p = 1.4 × 10

conclusionThe semi-automatic technique facilitates reproducible delineation of regions with active Crohn's disease. The semi-automatic thickness measurement sustains significantly improved interobserver agreement. Advances in knowledge: Automation of bowel wall thickness measurements strongly increases reproducibility of these measurements, which are commonly used in MRI scoring systems of Crohn's disease activity.

Indexed as

AdultCrohn DiseaseFemaleHumansImage Interpretation, Computer-AssistedMagnetic Resonance ImagingMaleReproducibility of Results

Identifiers

PMID28401775
PMCPMC5602169
OpenAlexW2606600513

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.