Magnetic Resonance Imaging in Knee Pathologies
Summary
Magnetic resonance imaging (MRI) has emerged as the premier non-invasive modality for evaluating a spectrum of knee pathologies, combining exquisite soft-tissue contrast with multiplanar capabilities. High-field systems (1.5–3.0 Tesla) enable detailed visualisation of meniscal integrity, ligamentous injuries, articular cartilage morphology and bone marrow signal changes. Beyond conventional proton-density and fat-suppressed sequences, advanced techniques such as T1ρ and T2 mapping permit quantitative assessment of cartilage composition, detecting early proteoglycan depletion and collagen matrix disruption. Diffusion-weighted imaging and dynamic contrast-enhanced protocols further characterise subchondral bone marrow oedema and synovial inflammation. MRI plays a pivotal role in diagnosing acute sports injuries, monitoring osteoarthritic progression and guiding surgical planning. Integration of quantitative biomarkers and machine-learning algorithms promises to standardise interpretation, personalise patient management and assess therapeutic response. Globally, MRI has become indispensable for screening at-risk athletic populations, evaluating postoperative repair and informing public health strategies to mitigate disability from knee disorders.
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Magnetic Resonance Imaging in Knee Pathologies publication trend
The graph below shows the total number of articles in magnetic resonance imaging in knee pathologies across all publications each year (not limited to Nature Index journals).
Technical terms
3.0 Tesla (T) MRI: Strength of the main magnetic field in high-resolution scanners, enhancing signal-to-noise ratio and spatial detail.
Meniscal tear: A disruption of the fibrocartilaginous meniscus, classified by pattern (e.g. horizontal, radial) and grade, often visualised as intra-substance signal or displacement.
Bone marrow oedema lesion: Ill-defined hyperintense area on fluid-sensitive sequences reflecting increased interstitial water, often associated with trauma or osteoarthritis.
T1ρ relaxation time: Quantitative parameter sensitive to proteoglycan content within cartilage, where prolongation indicates early degenerative change.
T2 relaxation time: Quantitative metric reflecting collagen fibre orientation and water content in cartilage, with elevated values signifying matrix disruption.
References
- Prevalence of abnormal findings in 230 knees of asymptomatic adults using 3.0 T MRI. Skeletal Radiology (2020).
- Multiparametric MRI characterization of knee articular cartilage and subchondral bone shape in collegiate basketball players. Journal of Orthopaedic Research® (2020).
- Evaluation Of Knee Meniscal Tear Frequency In Symptomatic Patients Setting MRI As Gold Standard. Medical Science Journal for Advance Research (2022).
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