Artifacts in Musculoskeletal MR Imaging

Singh, Dinesh; Chin, Michael S.; Peh, Wilfred C.G.

doi:10.1055/s-0034-1365831

Cited by 27 publications

(6 citation statements)

References 43 publications

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“…Three adjacent slices were analyzed for each region in the high-resolution 3D DESS sequence, and 1 slice was analyzed for each region in the T2-weighted sequence. The angles between the main magnetic field and the ACL grafts in our study were small (36.1°6 4.5°) enough to exclude a potential influence of magic angle artifacts 41 on the signal intensities.…”

Section: Evaluation Of Graft Healingmentioning

confidence: 89%

The Graft Bending Angle Can Affect Early Graft Healing After Anterior Cruciate Ligament Reconstruction: In Vivo Analysis With 2 Years’ Follow-up

et al. 2017

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Section: Evaluation Of Graft Healingmentioning

confidence: 89%

The Graft Bending Angle Can Affect Early Graft Healing After Anterior Cruciate Ligament Reconstruction: In Vivo Analysis With 2 Years’ Follow-up

et al. 2017

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“…Magnetic resonance imaging has become an important diagnostic tool in the evaluation of rheumatic diseases [12, 14, 15]. It is currently considered the best non-invasive, observer-independent imaging modality to evaluate inflammation of joints, tendons, entheses and bone marrow in adults, children and adolescents with rheumatic conditions [2].…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging in inflammatory rheumatoid diseases

et al. 2016

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Magnetic resonance (MR) is used more and more frequently to diagnose changes in the musculoskeletal system in the course of rheumatic diseases, at their initial assessment, for treatment monitoring and for identification of complications. The article presents the history of magnetic resonance imaging, the basic principles underlying its operation as well as types of magnets, coils and MRI protocols used in the diagnostic process of rheumatic diseases. It enumerates advantages and disadvantages of individual MRI scanners. The principles of MRI coil operation are explained, and the sequences used for MR image analysis are described, particularly in terms of their application in rheumatology, including T1-, T2-, PD-weighted, STIR/TIRM and contrast-enhanced T1-weighted images. Furthermore, views on the need to use contrast agents to optimise diagnosis, particularly in synovitis-like changes, are presented. Finally, methods for the assessment of MR images are listed, including the semi-quantitative method by RAMRIS and quantitative dynamic examination.

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“…For MRI of the hand, motion-induced image degradation has not been thoroughly investigated, but motion artefacts are a known predicament. In order to reduce the motion-induced artefacts, the common advice is reassuring the patient, using sequences with shorter acquisition time, using an appropriate coil, performing the scan under sedation, using soft pads between the inner surface of the coil and the patient's skin, and the use of immobilizing devices like Velcro straps [20].…”

Section: Visual Grading Of Motion Artefactsmentioning

confidence: 99%

Acceptance and image quality of high‐resolution peripheral quantitative computed tomography of the metacarpophalangeal joints in rheumatoid arthritis

et al. 2021

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To investigate the acceptance of the high-resolution peripheral quantitative computed tomography (HR-pQCT) in rheumatoid arthritis (RA). The second objective was to investigate the motion artefacts of the metacarpophalangeal (MCP) joints with two different custom-made positioning devices. Methods:Fifty patients with established RA had their MCP joints scanned by HR-pQCT with two different custom-made positioning devices and examined by conventional X-ray. Afterwards, the patients answered a questionnaire of imaging experience. The comparability of the erosion measures was investigated between the two different custom-made positioning devices by Bland-Altman plot, and intrareader repeatability by intraclass correlation coe cient. The motion artefacts were graded for each acquisition, and intrareader repeatability was investigated by Cohen's kappa coe cient. Results:Forty percent of the patients preferred HR-pQCT imaging, only 6% preferred conventional X-ray. Seventy-four percent found it di cult to keep their ngers steady during the scan. Fifty percent of the patients reported the in atable immobilization device helped to keep their ngers steady while only 6% reported that it impaired their ability to do so. However, this difference was not re ected in the visual grading, as motion artefacts were sparse, and no clinically relevant difference could be observed. The intrareader repeatability and comparability for the erosion measures were excellent. Conclusion:The high acceptance among patients adds to the feasibility of HR-pQCT imaging of MCP joints in patients with RA. The in atable immobilization device did not reduce motion-induced image degradation, as the overall visual grading for motion artefacts was low for imaging of the MCP joints in both acquisitions.MCP joints, might exacerbate the motion artefacts. However, motion-induced image degradation and the number of repeated acquisitions are rarely reported for the MCP joints [6][7][8][9].The objective of this study was two-fold. Firstly, the acceptance of HR-pQCT imaging in patients with established RA was investigated using a patient-reported experience measure questionnaire [10]. Secondly, we investigated the comparability and repeatability of motion artefacts and erosion measures of the 2 nd and 3 rd MCP joint for two different custom-made hand positioning devices. Methods Study design and populationPatients with rheumatoid arthritis, according to the ACR/EULAR (2010) classi cation criteria [11], were recruited from the outpatient clinic at the Department of Rheumatology, Aarhus University Hospital. Inclusion criteria were the ability to give consent, age ≥ 18 years and disease duration ≥ 5 years. Exclusion criteria were fracture or luxation of the MCP joints in both hands, evidence of active malignant disease, hypocalcemia, impaired renal function (Estimated glomerular ltration rate <35ml/min), untreated hypo-or hyperthyroidism or pregnancy.A full medical history was obtained, and a clinical examination was performed for all individuals. Speci cally, demog...

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Artifacts in Musculoskeletal MR Imaging

Cited by 27 publications

References 43 publications

The Graft Bending Angle Can Affect Early Graft Healing After Anterior Cruciate Ligament Reconstruction: In Vivo Analysis With 2 Years’ Follow-up

The Graft Bending Angle Can Affect Early Graft Healing After Anterior Cruciate Ligament Reconstruction: In Vivo Analysis With 2 Years’ Follow-up

Magnetic resonance imaging in inflammatory rheumatoid diseases

Acceptance and image quality of high‐resolution peripheral quantitative computed tomography of the metacarpophalangeal joints in rheumatoid arthritis

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