Precision of low-dose CT-based micromotion analysis technique for the assessment of early acetabular cup migration compared with gold standard RSA: a prospective study of 30 patients up to 1 year

Angelomenos, Vasileios; Mohaddes, Maziar; Itayem, Raed; Shareghi, Bita

doi:10.2340/17453674.2022.2528

Cited by 8 publications

(20 citation statements)

References 43 publications

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“…Reported precisions (when defined as 1.96 × SD) for traditional and model-based RSA in comparable acetabular cup configurations range from 0.01 to 0.29 mm for translations and from 0.05° to 0.59° for rotations. 9 , 10 , 12 , 13 Reported precisions for CT-based migration analysis techniques in acetabular cups range from 0.03 to 0.16 mm for translations and from 0.06° to 0.37° for rotations. 9 , 10 , 12 The method presented in this paper shows comparable acetabular cup precision to these methods of 0.08–0.11 mm for translations and 0.19°–0.42° for rotations.…”

Section: Discussionmentioning

confidence: 99%

“… 9 , 10 , 12 , 13 Reported precisions for CT-based migration analysis techniques in acetabular cups range from 0.03 to 0.16 mm for translations and from 0.06° to 0.37° for rotations. 9 , 10 , 12 The method presented in this paper shows comparable acetabular cup precision to these methods of 0.08–0.11 mm for translations and 0.19°–0.42° for rotations.…”

Section: Discussionmentioning

confidence: 99%

“…Computed tomography (CT) is a ubiquitous method to create high-resolution 3D images of voxels of submillimetre size. A commercial solution, computed tomography micromotion analysis (CTMA, Sectra, Linköping, Sweden) is a promising alternative to RSA which uses CT scans to determine movements between implants and bones in a similar fashion to RSA with similar accuracy and precision, 9 – 12 but is not yet available for use with all implants.…”

Section: Introductionmentioning

confidence: 99%

“…Some of these studies have used tantalum beads embedded into implants 10 , 12 and others have used a model-based method to measure migration without modifying the implants. 9 , 16 – 18 One of these groups has developed an entirely markerless system 10 which has the potential to be used in routine clinical practice. In the current study, a semi-automated low dose CT spatial analysis (CTSA) method was developed for assessing migration in a monobloc ceramic hip resurfacing implant within a premarket clinical investigation.…”

Section: Introductionmentioning

confidence: 99%

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Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): A phantom study

Clarke

Logishetty

Cobb

2023

Proc Inst Mech Eng H

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Implant migration is a predictor of arthroplasty survivorship. It is crucial to monitor the migration of novel hip prostheses within premarket clinical investigations. RSA is the gold standard method, but requires calibrated radiographs using specialised equipment. A commercial computed tomography micromotion analysis solution is a promising alternative but is not yet available for use with monobloc ceramic implants. This study aimed to develop and validate a CT-based spatial analysis (CTSA) method for use with ceramic implants. A phantom study was undertaken to assess accuracy and precision. A ceramic hip resurfacing arthroplasty (HRA) and 20 tantalum beads were implanted into a synthetic hip model and mounted onto a 6-degree of freedom motion stage. The hip was repeatedly scanned with a low dose CT protocol, with imposed micromovements. Data were interrogated using a semiautomated technique. The effective radiation dose for each scan was estimated to be 0.25 mSv. For the head implant, precision ranged between 0.11 and 0.28 mm for translations and 0.34°–0.42° for rotations. For the cup implant, precision ranged between 0.08 and 0.11 mm and 0.19° and 0.42°. For the head, accuracy ranged between 0.04 and 0.18 mm for translations and 0.28°–0.46° for rotations. For the cup, accuracy ranged between 0.04 and 0.08 mm and 0.17° and 0.43°. This in vitro study demonstrates that low dose CTSA of a ceramic HRA is similar in accuracy to RSA. CT is ubiquitous, and this method may be an alternative to RSA to measure prosthesis migration.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): A phantom study

Clarke

Logishetty

Cobb

2023

Proc Inst Mech Eng H

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“…Computed tomography (CT) offers direct 3-dimensional data that can serve as a substitute for traditional markers [12]. Preliminary arthroplasty studies with CT-based surface registration have shown comparable results to marker-based RSA without significant loss of accuracy or precision [13][14][15][16]. With respect to arthrokinematic studies, CTbased radiostereometry (CT-RSA) is not dependent on tantalum markers and, with surface detection, it could offer an alternative method for precision evaluation.…”

mentioning

confidence: 99%

CT-based radiostereometric analysis for assessing midfoot kinematics: precision compared with marker-based radiostereometry

Poulsen¹,

Stødle²,

Nordsletten³

et al. 2023

ActaO

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Background and purpose: 3-dimensional midfoot motion is hard to evaluate in clinical practice. We present a new computed tomography (CT)-based radiostereometric analysis (CT-RSA) technique to examine in vivo midfoot kinematics during single-leg stance and compare it with marker-based radiostereometry (RSA).Patients and methods: 8 patients were examined with bilateral non- and full-weight-bearing CT images of the midfoot. 1st tarsometatarsal motion was analyzed using a surface-registration technique (CT-RSA). As all patients had unilateral tantalum markers in the 1st cuneiform (C1) and 1st metatarsal (M1), comparison of precision with markerbased RSA was performed. CT-RSA precision was evaluated with surface registration of both C1–M1 bone and C1–M1 tantalum markers, while RSA precision was determined with C1–M1 markers only. Additionally, to remove motion bias, we evaluated intrasegmental CT-RSA precision by comparing proximal with distal part of M1.Results: Under physical load, the primary movement for the 1st tarsometatarsal joint was M1 dorsiflexion (mean 1.4°), adduction (mean 1.4°), and dorsal translation (mean 1.1 mm). CT-RSA precision, using surface bone or markers, was in the range of 0.3–0.7 mm for translation and 0.6–1.6° for rotation. In comparison, RSA precision was in the range of 0.4–0.9 mm for translation and 1.0–1.7° for rotation. Finally, intrasegmental CT-RSA precision was in the range of 0.1–0.2 mm for translation and 0.4–0.5° for rotation.Conclusion: CT-RSA is a valid and precise, non-invasive method to measure midfoot kinematics when compared with conventional RSA.

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CT-Based Micromotion Analysis After Locking Plate Fixation of AO Type C Distal Radius Fractures

Lundqvist,

Olivecrona,

Wretenberg

et al. 2023

JOIO

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Background Volar locking plate fixation (VLPF) is the most common method for operative fixation of distal radius fractures (DRF). The dorsal ulnar corner (DUC) can be difficult to stabilize as the fragment is small and not exposed when using the volar approach. The purpose of this study was to study fracture fragment migration after VLPF of AO type C DRF, using a volume registration technique of paired CT scans with special focus on the DUC fragment. Materials and Methods This pilot study included ten patients with AO type C DRF, all operated with VLPF. The primary outcome was radiographic outcome. Postoperative and 1-year scans were compared and analyzed. Fragment migration was assessed with CT-based micromotion analysis (CTMA), a software technique used for volume registration of paired CT scans. Results All plates were stable over time. Two patients showed signs of screw movement (0.2–0.35 mm and 0.35– > 1 mm respectively). Postoperative reduction was maintained, and there was no fragment migration at the 1-year follow-up except for one case with increased dorsal tilt. The DUC fragment was found in 8/10 cases, fixated in 7/8 cases, and not dislocated in any case at the 1-year follow-up. Conclusion The CTMA results indicate that variable-angle VLPF after AO type C DRF can yield and maintain a highly stable reduction of the fracture fragments. The DUC fragment remained stable regardless of the number of screws through the fragment. CT volume registration can be a valuable tool in the detailed assessment of fracture fragment migration following volar plate fixation of DRFs.

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Precision of low-dose CT-based micromotion analysis technique for the assessment of early acetabular cup migration compared with gold standard RSA: a prospective study of 30 patients up to 1 year

Cited by 8 publications

References 43 publications

Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): A phantom study

Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): A phantom study

CT-based radiostereometric analysis for assessing midfoot kinematics: precision compared with marker-based radiostereometry

CT-Based Micromotion Analysis After Locking Plate Fixation of AO Type C Distal Radius Fractures

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