Magnetic resonance imaging of the postoperative hip

Hayter, Catherine L.; Koff, Matthew F.; Potter, Hollis G.

doi:10.1002/jmri.23523

Cited by 75 publications

(91 citation statements)

References 61 publications

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“…The risk factors are advanced age, obesity, diabetes mellitus and immune suppression. Distinction is made between early infections, occurring within six weeks post surgery, and late infections [28,42]. Early infections can be treated through attempted preservation of the prosthesis by means of debridement and purging.…”

Section: Infectionsmentioning

confidence: 99%

“…than spectral fat saturation, while T1-and T2-weighted (turbo-) spin echo sequences are better suited than gradient echo sequences at decreasing the metal artifacts of the hip endoprosthesis and detecting periprosthetic bone and soft tissue changes as well as fluid collections [36,42,43]. The absence of joint effusion has a high negative predictive value for an infection of 96 % [36].…”

Section: Infectionsmentioning

confidence: 99%

“…hypointense and slightly hyperintense in relation to the muscle in T1-and T2-weighted sequences, respectively, with T2-weighting showing a hypointense line to the bone marrow, and typically involve no perifocal bone marrow edema [36,40,42]. With metal-metal tribological pairings, the terms cyst, ALVAL (aseptic lymphocytic vasculitis-associated lesion) or ARMD (adverse reactions to metal debris) are used synonymously with pseudotumor.…”

Section: Pseudotumorsmentioning

confidence: 99%

“…The key to diagnosis is detecting a space occupation in connection with the hip joint of the prosthesis and, in the case of metal-metal pairings, solid components and/or a low-signal wall in T2-weighting ( • " Fig. 12d-j) [42,43]. Multiple grading systems for soft tissue changes occurring with metal-metal prostheses have been proposed.…”

Section: Pseudotumorsmentioning

confidence: 99%

“…▶ Using spin echo and turbo spin echo sequences instead of gradient echo (GRE) sequences as well as using STIR sequences instead of frequency-selective techniques for fat suppression ▶ Interchanging phase and frequency direction ▶ Imaging with higher sensitivity bandwidth, if applicable orienting the longitudinal axis of the metal implant along the primary direction of the magnetic field ▶ Using modern artifact-reducing sequences, e. g. SEMAC (slice-encoding for metal artifact correction) or MARVRIC (multiple-acquisition variable-resonance imaging combination; GE Healthcare, Milwaukee, WI) [40,42]. CT involves primarily hardening artifacts along metallic non-radiopaque materials.…”

Section: Metal Artefacts In Cross-sectional Imagingmentioning

confidence: 99%

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Modern Radiological Postoperative Diagnostics of the Hip Joint in Children and Adults

Weber

Egermann

Thierjung

et al. 2015

Fortschr Röntgenstr

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The assessment of bone healing and loosening of endoprosthesis material was long the primary indication for postoperative projection radiography and CT imaging of the hip joint following trauma and endoprosthesis implantation. With the increasing number of joint-preserving surgery, e.?g. of surgical hip luxation and hip arthroscopy for the treatment of femoroacetabular impingement (FAI), high-resolution imaging of intra-articular pathologies before and after surgery has become increasingly important. In this review article, diagnostic imaging of the hip joint is presented following common trauma surgery and orthopedic surgery interventions. The imaging modalities of projection radiography, CT and MRI including direct MR-arthrography are discussed with regard to their diagnostic capability in the postoperative assessment of the hip joint. Among others topics, imaging is discussed following hip arthroplasty, following surgical hip luxation and arthroscopic interventions for the treatment of FAI, as well as following core decompression for avascular necrosis of the femoral head. Moreover, orthopedic interventions of the hip joint in children and adolescents are presented and the dedicated reporting of postoperative imaging is outlined. Key points: ??Consolidation of osteotomies and position of implants should be assessed in postoperative imaging. ??MRI is useful for confirming correct articulation after treatment of congenital hip dislocation. ??Radiologically assessable complications after total hip replacement are inlay wear, loosening, dislocation, periarticular ossifications and infection. ??MRI can detect and classify pseudotumours in cases of metal-metal pairing after total hip replacement. Citation Format: ??Weber MA, Egermann M, Thierjung H et?al. Modern Radiological Postoperative Diagnostics of the Hip Joint in Children and Adults. Fortschr R?ntgenstr 2015; 187: 525???542

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Section: Infectionsmentioning

confidence: 99%

Section: Infectionsmentioning

confidence: 99%

Section: Pseudotumorsmentioning

confidence: 99%

Section: Pseudotumorsmentioning

confidence: 99%

Section: Metal Artefacts In Cross-sectional Imagingmentioning

confidence: 99%

See 3 more Smart Citations

Modern Radiological Postoperative Diagnostics of the Hip Joint in Children and Adults

Weber

Egermann

Thierjung

et al. 2015

Fortschr Röntgenstr

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In vitro assessment of knee MRI in the presence of metal implants comparing MAVRIC-SL and conventional fast spin echo sequences at 1.5 and 3 T field strength

Liebl

Heilmeier

Lee

et al. 2014

J. Magn. Reson. Imaging

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PURPOSE To assess lesion detection and artifact size reduction of a MAVRIC-SEMAC hybrid sequence (MAVRIC-SL) compared to standard sequences at 1.5T and 3T in porcine knee specimens with metal hardware. METHODS Artificial cartilage and bone lesions of defined size were created in the proximity of titanium and steel screws with 2.5 mm diameter in 12 porcine knee specimens and were imaged at 1.5T and 3T MRI with MAVRIC-SL PD and STIR, standard FSE T2 PD and STIR and fat-saturated T2 FSE sequences. Three radiologists blinded to the lesion locations assessed lesion detection rates on randomized images for each sequence using ROC. Artifact length and width were measured. RESULTS Metal artifact sizes were largest in the presence of steel screws at 3T (FSE T2 FS: 28.7cm2) and 1.5T (16.03cm2). MAVRIC-SL PD and STIR reduced artifact sizes at both 3T (1.43cm2; 2.46cm2) and 1.5T (1.16cm2; 1.59cm2) compared to FS T2 FSE sequences (27.57cm2; 13.20cm2). At 3T, ROC derived AUC values using MAVRIC-SL sequences were significantly higher compared to standard sequences (MAVRIC-PD: 0.87, versus FSE-T2-FS: 0.73 (p=0.025); MAVRIC- STIR: 0.9 versus T2-STIR: 0.78 (p=0.001) and versus FSE-T2-FS: 0.73 (p=0.026)). Similar values were observed at 1.5T. Comparison of 3T and 1.5T showed no significant differences (MAVRIC-SL PD: p=0.382; MAVRIC-SL STIR: p=0.071. CONCLUSION MAVRIC-SL sequences provided superior lesion detection and reduced metal artifact size at both 1.5T and 3T compared to conventionally used FSE sequences. No significant disadvantage was found comparing MAVRIC-SL at 3T and 1.5T, though metal artifacts at 3T were larger.

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Imaging near orthopedic hardware

Koff

Burge

Koch

et al. 2017

J. Magn. Reson. Imaging

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Over one million total joint replacement surgeries were performed in the US in 2013 alone, and this number is expected to more than double by 2030. Traditional imaging techniques for post-operative evaluation of implanted devices, such as radiography, computerized tomography or ultrasound utilize ionizing radiation, suffer from beam hardening artifact, or lack the inherent high contrast necessary to adequately evaluate soft tissues around the implants, respectively. Magnetic resonance imaging (MRI), due to its ability to generate multi-planar, high contrast images without the use of ionizing radiation is ideal for evaluating peri-prosthetic soft tissues but has traditionally suffered from in-plane and through-plane data misregistration due to the magnetic susceptibility of implanted materials. A recent renaissance in the interest of imaging near arthroplasty and implanted orthopaedic hardware has led to the development of new techniques which help to mitigate the effects of magnetic susceptibility. This paper will describe the challenges of performing imaging near implanted orthopaedic hardware, how to generate clinically interpretable images when imaging near implanted devices, and how the images may be interpreted for clinical use. We will also describe current developments of utilizing MRI to evaluate implanted orthopaedic hardware.

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Magnetic resonance imaging of the postoperative hip

Cited by 75 publications

References 61 publications

Modern Radiological Postoperative Diagnostics of the Hip Joint in Children and Adults

Modern Radiological Postoperative Diagnostics of the Hip Joint in Children and Adults

In vitro assessment of knee MRI in the presence of metal implants comparing MAVRIC-SL and conventional fast spin echo sequences at 1.5 and 3 T field strength

Imaging near orthopedic hardware

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