Evidence map›Paper›PMID 25667150›Full record

ArticleBMJ open2015

Zonal T2* and T1Gd assessment of knee joint cartilage in various histological grades of cartilage degeneration: an observational in vitro study.

Bernd Bittersohl, Harish S Hosalkar, Falk R Miese, Jonas Schibensky, Dietmar P König, Monika Herten, Gerald Antoch, Rüdiger Krauspe, Christoph Zilkens

Open access · goldAbstract readValidation Study
In one paragraph

Article in BMJ open, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
5.1field-weighted citation impact, top 5% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 47 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

9 authors at 3 institutions in 1 country.

Bernd BittersohlMedical Faculty, Department of Orthopaedics, University Düsseldorf, Düsseldorf, Germany.
Harish S HosalkarCenter of Hip Preservation and Children's Orthopaedics, San Diego, California, USA.
Falk R MieseMedical Faculty, Department of Diagnostic and Interventional Radiology, University Düsseldorf, Düsseldorf, Germany.
Jonas SchibenskyMedical Faculty, Department of Orthopaedics, University Düsseldorf, Düsseldorf, Germany.
Dietmar P KönigLVR Clinic for Orthopedic Surgery, Viersen, Germany.
Monika HertenMedical Faculty, Clinic for Vascular and Endovascular Surgery, University Münster, Münster, Germany.
Gerald AntochMedical Faculty, Department of Diagnostic and Interventional Radiology, University Düsseldorf, Düsseldorf, Germany.
Rüdiger KrauspeMedical Faculty, Department of Orthopaedics, University Düsseldorf, Düsseldorf, Germany.
Christoph ZilkensMedical Faculty, Department of Orthopaedics, University Düsseldorf, Düsseldorf, Germany.
Heinrich Heine University Düsseldorf · DELVR-Klinik für Orthopädie Viersen · DEUniversity Hospital Münster · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesAccurate assessment of cartilage status is increasingly becoming important to clinicians for offering joint preservation surgeries versus joint replacements. The goal of this study was to evaluate the validity of three-dimensional (3D), gradient-echo (GRE)-based T2* and T1Gd mapping for the assessment of various histological severities of degeneration in knee joint cartilage with potential implications for clinical management.

methodsMRI and histological assessment were conducted in 36 ex vivo lateral femoral condyle specimens. The MRI protocol included a 3D GRE multiecho data image combination sequence in order to assess the T2* decay, a 3D double-echo steady-state sequence for assessment of cartilage morphology, and a dual flip angle 3D GRE sequence with volumetric interpolated breathhold examination for the T1Gd assessment. The histological sample analysis was performed according to the Mankin system. The data were then analysed statistically and correlated.

resultsWe observed a significant decrease in the T2* and T1Gd values with increasing grades of cartilage degeneration (p<0.001) and a moderate correlation between T2* (r=0.514)/T1Gd (r=0.556) and the histological grading of cartilage degeneration (p<0.001). In addition, we noted a zonal variation in the T2* and T1Gd values reflecting characteristic zonal differences in the biochemical composition of hyaline cartilage.

conclusionsThis study outlines the potential of GRE-based T2* and T1Gd mapping to identify various grades of cartilage damage. Early changes in specific zones may assist clinicians in identifying methods of early intervention involving the targeted joint preservation approach versus moving forward with unicompartmental, bicompartmental or tricompartmental joint replacement procedures. TRIAL REGISTRATION NUMBER: DRKS00000729.

Indexed as

Severity of Illness IndexAdultAgedAged, 80 and overCartilage, ArticularCartilage DiseasesFemurHumansIn Vitro TechniquesKneeKnee JointMagnetic Resonance ImagingMaleMiddle AgedReproducibility of Results

Identifiers

PMID25667150
PMCPMC4322206
OpenAlexW2004757019

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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Registered trials

None linked

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.