Review of Quantitative Knee Articular Cartilage MR Imaging
-
- Banjar Mai
- Medical Imaging Department, King Abdullah Medical Complex Jeddah
-
- Horiuchi Saya
- Department of Radiology, St Luke’s International Hospital
-
- Gedeon David N.
- Department of Radiological Sciences, University of California, Irvine
-
- Yoshioka Hiroshi
- Department of Radiological Sciences, University of California, Irvine
Search this article
Abstract
<p>Osteoarthritis (OA) is one of the most prevalent disorders in today’s society, resulting in significant socio-economic costs and morbidity. MRI is widely used as a non-invasive imaging tool for OA of the knee. However, conventional knee MRI has limitations to detect subtle early cartilage degeneration before morphological changes are visually apparent. Novel MRI pulse sequences for cartilage assessment have recently received increased attention due to newly developed compositional MRI techniques, including: T2 mapping, T1rho mapping, delayed gadolinium-enhanced MRI of cartilage (dGEMRIC), sodium MRI, diffusion-weighted imaging (DWI)/ diffusion tensor imaging (DTI), ultrashort TE (uTE), and glycosaminoglycan specific chemical exchange saturation transfer (gagCEST) imaging. In this article, we will first review these quantitative assessments. Then, we will discuss the variations of quantitative values of knee articular cartilage with cartilage layer (depth)- and angle (regional)-dependent approaches. Multiple MRI sequence techniques can discern qualitative differences in knee cartilage. Normal articular hyaline cartilage has a zonal variation in T2 relaxation times with increasing T2 values from the subchondral bone to the articular surface. T1rho values were also higher in the superficial layer than in the deep layer in most locations in the medial and lateral femoral condyles, including the weight-bearing portion. Magic angle effect on T2 mapping is clearly observed in the both medial and lateral femoral condyles, especially within the deep layers. One of the limitations for clinical use of these compositional assessments is a long scan time. Recent new approaches with compressed sensing (CS) and MR fingerprinting (MRF) have potential to provide accurate and fast quantitative cartilage assessments.</p>
Journal
-
- Magnetic Resonance in Medical Sciences
-
Magnetic Resonance in Medical Sciences 21 (1), 29-40, 2022
Japanese Society for Magnetic Resonance in Medicine