Synthetic MRI is not yet ready for morphologic and functional assessment of patellar cartilage at 1.5 Tesla - Université de Lorraine Access content directly
Journal Articles Diagnostic and Interventional Imaging Year : 2021

Synthetic MRI is not yet ready for morphologic and functional assessment of patellar cartilage at 1.5 Tesla

Abstract

The purpose of this study was to compare morphologic assessment and relaxometry of patellar hyaline cartilage between conventional sequences (fast spin-echo [FSE] T2-weighted fat-saturated and T2-mapping) and synthetic T2 short-T1 inversion recovery (STIR) and T2 maps at 1.5 T magnetic resonance imaging (MRI). Method: The MRI examinations of the knee obtained at 1.5 T in 49 consecutive patients were retrospectively studied. There were 21 men and 28 women with a mean age of 45 ()+/-17.7 (SD) years (range: 18-88 years). Conventional and synthetic acquisitions were performed, including T2-weighted fat-saturated and T2-mapping sequences. Two radiologists independently compared patellar cartilage T2-relaxation time on conventional T2-mapping and synthetic T2-mapping images. A third radiologist evaluated the patellar cartilage morphology on conventional and synthetic T2-weighted images. The presence of artifacts was also assessed. Interobserver agreement for quantitative variables was assessed using intraclass correlation coefficient (ICC). Results: In vitro, conventional and synthetic T2 maps yielded similar mean T2 values 58.5 +/-2.3 (SD) ms and 58.8 +/-2.6 (SD) ms, respectively (P = 0.414) and 6% lower than the expected experimental values (P= 0.038). Synthetic images allowed for a 15% reduction in examination time compared to conventional images. On conventional sequences, patellar chondropathy was identified in 35 patients (35/49; 71%) with a mean chondropathy grade of 4.8 +/-4.8 (SD). On synthetic images, 28 patients (28/49; 57%) were diagnosed with patellar chondropathy, with a significant 14% difference (P = 0.009) and lower chondropathy scores (3.7 +/-4.9 [SD]) compared to conventional images. Motion artifacts were more frequently observed on synthetic images (18%) than on conventional ones (6%). The interobserver agreement was excellent for both conventional and synthetic T2 maps (ICC > 0.83). Mean

Domains

Imaging
Fichier principal
Vignette du fichier
S2211568420302199.pdf (25.77 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03224288 , version 1 (10-03-2023)

Licence

Attribution - NonCommercial

Identifiers

Cite

C. Vogrig, J.-S. Louis, F. Avila, R. Gillet, G. Hossu, et al.. Synthetic MRI is not yet ready for morphologic and functional assessment of patellar cartilage at 1.5 Tesla. Diagnostic and Interventional Imaging, 2021, 102 (3), pp.181-187. ⟨10.1016/j.diii.2020.09.002⟩. ⟨hal-03224288⟩
38 View
5 Download

Altmetric

Share

Gmail Facebook X LinkedIn More