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Master Thesis

Remaniements dégénératifs du rachis lombaire‎ : comparaison entre les séquences T1 et T2 dixon

Abstract : Degenerative fat involution of the lumbar vertebral endplates, comparison of Tl weighted and T2 weighted Dixon sequences Rationale and objectives To explore low back pain, Magnetic Resonance Imaging (MRI) has become a routine examination. Protocols usually include Tl-weighted and T2-weighted with fat saturation images in sagittal plan. While many methods have been brought forward to assure this fat saturation, the Dixon method has become a reference. Dixon sequences pive a set of four images depicting water only and fat only. Tl-weighted images are almost merle to depict fatty lesions. Our primary goal was to have it confirmed that T2w Dixon Fat is more reproducible than T1w to characterize fatty degenerative involution. Materials and methods : 99 consecutive exams were conducted. Average age was 51.6 (Standard Derivation ±15,9) with 41 men and 58 women. Presence or absence of fat involution on endplates from bottons edge of T12 to top S1 's body was assessed. Exams were read by two readers. Inter and intrareader agreement were calculated. Results : Junior intrareader agreement for T1w was moderate : 0.54 [0.49;0.58] and when looking at T2w Dixon Fat agreement was good (0.87 [0.84-0.90]). Interreader agreement with T1w sequence was moderate (0.41 [0.36-0.45]) and moderate to good for T2w Dixon Fat (0,60 [0,56-0,65]). Conclusion : Dixon methods is better than T1w images to assure depiction of endplates fat involution. This study gives an argument to gain one acquisition time.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-03016435
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Submitted on : Friday, November 20, 2020 - 1:43:12 PM
Last modification on : Thursday, November 26, 2020 - 3:28:23 AM

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Louis Debris. Remaniements dégénératifs du rachis lombaire‎ : comparaison entre les séquences T1 et T2 dixon. Médecine humaine et pathologie. 2020. ⟨dumas-03016435⟩

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