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Erschienen in: European Radiology 3/2019

07.09.2018 | Musculoskeletal

Comparison of radiographs, tomosynthesis and CT with metal artifact reduction for the detection of hip prosthetic loosening

verfasst von: Romain Gillet, Pedro Teixeira, Chloé Bonarelli, Henry Coudane, François Sirveaux, Mathias Louis, Alain Blum

Erschienen in: European Radiology | Ausgabe 3/2019

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Abstract

Objectives

To evaluate the diagnostic performance of digital tomosynthesis (DTS) for the diagnosis of hip prosthesis loosening (PL) compared with conventional radiographs and CT with metal artifact reduction (CT-MAR).

Methods

Forty-nine patients with painful hip prosthesis were prospectively included and underwent anteroposterior and lateral radiographs, anteroposterior DTS and CT-MAR of the hip. This study was approved by the local ethics committee, and all patients signed an informed consent form. Images were evaluated independently by two radiologists. Periprosthetic radiolucent lines wider than 2 mm found in two or more Gruen or De Lee and Charnley zones were considered diagnostic of PL. All cases of PL were confirmed surgically. Patients with a stable radiological follow-up for at least 1 year with an alternative cause for the symptoms or with no surgical evidence of PL were considered PL negative.

Results

There were 21 cases of PL, 9 unilateral and 12 bilateral. For both the acetabular and femoral sides, DTS had a specificity for PL detection similar to that of conventional radiographs and CT-MAR (98.5–100%, 96.9%–100% and 96.9–95.4% respectively for both readers) and a sensitivity similar to conventional radiographs (39.9–45.4% versus 33.3–51.5% for both readers) but lower than CT-MAR (84.85% for both readers). The interobserver agreement was 0.84 for CT-MAR, 0.53 for DTS and 0.39 for conventional radiographs.

Conclusion

DTS has a similar diagnostic performance to radiographs for the diagnosis of PL with a better interobserver agreement. The sensitivity however remains lower than that of CT-MAR.

Key Points

• Plain radiograph is still the first imaging step when hip prosthesis loosening is suspected.
• Interobserver agreement is better with digital tomosynthesis than radiographs.
• Sensitivity of CT with state-of-the-art metal artifact reduction is superior to that of digital tomosynthesis.
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Metadaten
Titel
Comparison of radiographs, tomosynthesis and CT with metal artifact reduction for the detection of hip prosthetic loosening
verfasst von
Romain Gillet
Pedro Teixeira
Chloé Bonarelli
Henry Coudane
François Sirveaux
Mathias Louis
Alain Blum
Publikationsdatum
07.09.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 3/2019
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-018-5717-3

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