Low-dose CT-based implant motion analysis is a precise tool for early migration measurements of hip cups: a clinical study of 24 patients

Brodén, Cyrus; Sandberg, Olof; Sköldenberg, Olof; Stigbrand, Hampus; Hänni, Mari; Giles, Joshua W.; Emery, Roger; Lazarinis, Stergios; Nyström, Andreas; Olivecrona, Henrik

doi:10.1080/17453674.2020.1725345

Cited by 24 publications

(37 citation statements)

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“…We also included precision measurement of 9 cemented cups as these were visible in the CT stacks. That precision, 0.1-0.2 mm and 0.1-0.2°, is similar to the precision reported in another recently published article on the precision of CTMA for cups: 0.1-0.3 mm and 0.2-0.4° (Brodén et al 2020b).…”

Section: Discussionsupporting

confidence: 90%

The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

et al. 2020

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Section: Discussionsupporting

confidence: 90%

The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

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“… 2016 ) and 0.2–2.3 mSv for a clinical hip study (Brodén et al. 2020 ). However, the range in radiation dose in this clinical study is quite wide.…”

Section: Discussionmentioning

confidence: 99%

Effective radiation dose in radiostereometric analysis of the hip

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Background and purpose — Radiostereometric analysis (RSA) is the gold standard to study micromotion of joint replacements. RSA requires the acquisition of additional radiographs increasing the radiation dose of patients included in RSA studies. It is important to keep this dose as low as possible. Effective radiation dose (ED) measurements of RSA radiographs for different joints were done by Teeuwisse et al. some years ago using conventional radiology (CR); for total hip arthroplasty (THA), Teeuwisse et al. reported an ED of 0.150 milliSievert (mSv). With the modern digital radiography (DR) roentgen technique the ED is expected to be less. Material and methods — In this phantom study, simulating a standard patient, the ED for hip RSA radiographs is determined using DR under a variety of different roentgen techniques. The quality of the RSA radiographs was assessed for feasibility in migration analysis using a (semi-)automatic RSA analysis technique in RSA software. Results — A roentgen technique of 90 kV and 12.5 mAs with additional 0.2 copper (Cu) + 1 mm aluminum (Al) external tube filters results in an ED of 0.043 mSv and radiographs suitable for analysis in RSA software. Interpretation — The accumulated ED for a standard patient in a 2-year clinical hip RSA study with 5 follow-up moments and a double acquisition is below the acceptable threshold of 1.0 mSv provided by the EU radiation guideline for studies increasing knowledge for general health.

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“… 2016 , Brodén et al. 2019, 2020 ). However, to our knowledge there is no clinical study directly comparing CT and RSA in terms of precision for migration measurements on the same subjects.…”

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Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

et al. 2021

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Low-dose CT-based implant motion analysis is a precise tool for early migration measurements of hip cups: a clinical study of 24 patients

Abstract: Olivecrona (2020) Low-dose CT-based implant motion analysis is a precise tool for early migration measurements of hip cups: a clinical study of 24 patients,

Cited by 24 publications

References 14 publications

The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients

Effective radiation dose in radiostereometric analysis of the hip

Precision of CT-based micromotion analysis is comparable to radiostereometry for early migration measurements in cemented acetabular cups

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