Evidence map›Paper›PMID 32737621›Full record

ArticleJournal of experimental orthopaedics2020

The diagnostic potential of low-field MRI in problematic total knee arthroplasties - a feasibility study.

Femke F Schröder, Corine E Post, Sjoerd M van Raak, Frank F J Simonis, Frank-Christiaan B M Wagenaar, Rianne M H A Huis In't Veld, Nico Verdonschot

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of experimental orthopaedics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
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

6 citing papers in PubMed.

  1. Nexus: A versatile console for advanced low-field MRI.Magnetic resonance in medicine · 2025
    Article
  2. Modern low-field MRI.Skeletal radiology · 2024
    Review
  3. Review
  4. Management of Bone Loss in Revision Total Knee Arthroplasty: An International Consensus Symposium.HSS journal : the musculoskeletal journal of Hospital for Special Surgery · 2024
    Review
  5. Review
  6. Review
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

7 authors.

Femke F SchröderOCON, centre for orthopaedic surgery, Geerdinksweg 141 postbus 546, 7550, AM, Hengelo, The Netherlands. f.schroder@ocon.nl.ORCID http://orcid.org/0000-0003-0663-7873
Corine E PostOCON, centre for orthopaedic surgery, Geerdinksweg 141 postbus 546, 7550, AM, Hengelo, The Netherlands.
Sjoerd M van RaakDepartment of Radiology, Ziekenhuisgroep Twente, Zilvermeeuw 1, 7609PP, Almelo, The Netherlands.
Frank F J SimonisUniversity of Twente, Faculty of science and technology, Magnetic Detection and Imaging, postbus 217 7500 AE, Enschede, The Netherlands.
Frank-Christiaan B M WagenaarOCON, centre for orthopaedic surgery, Geerdinksweg 141 postbus 546, 7550, AM, Hengelo, The Netherlands.
Rianne M H A Huis In't VeldOCON, centre for orthopaedic surgery, Geerdinksweg 141 postbus 546, 7550, AM, Hengelo, The Netherlands.
Nico VerdonschotUniversity of Twente, Faculty of Engineering Technology, Biomechanical Engineering, postbus 217 7500 AE, Enschede, The Netherlands.

Funding

Pioneers in Health Care Innovation Fund 2016
6 · The paper itself

Abstract

purposeLow-field MRI, allowing imaging in supine and weight-bearing position, may be utilized as a non-invasive and affordable tool to differentiate between causes of dissatisfaction after TKA ('problematic TKA'). However, it remains unclear whether low-field MRI results in sufficient image quality with limited metal artefacts. Therefore, this feasibility study explored the diagnostic value of low-field MRI concerning pathologies associated with problematic TKA's' by comparing low-field MRI findings with CT and surgical findings. Secondly, differences in patellofemoral parameters between supine and weight-bearing low-field MRI were evaluated.

methodsEight patients with a problematic TKA were scanned using low-field MRI in weight-bearing and supine conditions. Six of these patients underwent revision surgery. Scans were analysed by a radiologist for pathologies associated with a problematic TKA. Additional patellofemoral and alignment parameters were measured by an imaging expert. MRI observations were compared to those obtained with CT, the diagnosis based on the clinical work-up, and findings during revision surgery.

resultsMRI observations of rotational malalignment, component loosening and patellofemoral arthrosis were comparable with the clinical diagnosis (six out of eight) and were confirmed during surgery (four out of six). All MRI observations were in line with CT findings (seven out of seven). Clinical diagnosis and surgical findings of collateral excessive laxity could not be confirmed with MRI (two out of eight).

conclusionLow-field MRI shows comparable diagnostic value as CT and might be a future low cost and ionizing radiation free alternative. Differences between supine and weight-bearing MRI did not yield clinically relevant information. The study was approved by the Medical Research Ethics Committees of Twente (Netherlands Trial Register: Trial NL7009 (NTR7207). Registered 5 March 2018, https://www.trialregister.nl/trial/7009 ).

Indexed as

Low field MRIProblematic TKATotal knee arthroplastyWeight-bearing MRI

Identifiers

PMID32737621
PMCPMC7394973

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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.