Thomas Kirchgesner1, Vasiliki Perlepe2, Nicolas Michoux3, Ahmed Larbi4, Bruno Vande Berg5. 1. Musculoskeletal Imaging Unit, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: Thomas.Kirchgesner@uclouvain.be. 2. Musculoskeletal Imaging Unit, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: Vasiliki.Perlepe@uclouvain.be. 3. Musculoskeletal Imaging Unit, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: Nicolas.Michoux@uclouvain.be. 4. Musculoskeletal Imaging Unit, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: Ahmed.Larbi@chu-nimes.fr. 5. Musculoskeletal Imaging Unit, Cliniques universitaires Saint-Luc, Université Catholique de Louvain, Institut de Recherche Expérimentale et Clinique (IREC), Avenue Hippocrate 10, 1200 Brussels, Belgium. Electronic address: Bruno.VandeBerg@uclouvain.be.
Abstract
OBJECTIVE: To compare the effectiveness of fat suppression and the signal-to-noise ratio (SNR) of the Dixon method with those of the CHESS (Chemical Shift-Selective) technique and STIR (Short Tau Inversion Recovery) sequence in hands of normal subjects at 2D MR imaging. MATERIAL AND METHODS: 14 healthy volunteers (mean age of 29.4 years) consented to have both hands prospectively imaged with SE T1 Dixon, T1 CHESS, T2 Dixon, T2 CHESS and STIR sequences in a 1.5T MR scanner. Three radiologists scored the effectiveness of fat suppression in bone marrow (EFSBM) and soft tissues (EFSST) in 20 joints per subject. One radiologist measured the SNR in 10 bones per subject. Statistical analysis used two-way ANOVA with random effects, paired t-test and observed agreement to assess differences in effectiveness of fat suppression, differences in SNR and inter-observer agreement. RESULTS: EFSBM was statistically significantly higher for T1 Dixon than for T1 CHESS and for T2 Dixon than for T2 CHESS (p<0.0001). EFSBM was significantly higher for T2 Dixon than for STIR in the coronal plane (p=0.0020). The SNR was significantly higher for T1 Dixon than for T1 CHESS and for T2 Dixon than for STIR (p<0.0001). The SNR was significantly lower for T2 Dixon than for T2 CHESS (p<0.0001). CONCLUSION: The Dixon method yields more effective fat suppression and higher SNR than the CHESS technique at 2D T1-weighted MR imaging of the hands. At T2-weighted MR imaging, fat suppression is more effective with the Dixon method while SNR is higher with the CHESS technique.
OBJECTIVE: To compare the effectiveness of fat suppression and the signal-to-noise ratio (SNR) of the Dixon method with those of the CHESS (Chemical Shift-Selective) technique and STIR (Short Tau Inversion Recovery) sequence in hands of normal subjects at 2D MR imaging. MATERIAL AND METHODS: 14 healthy volunteers (mean age of 29.4 years) consented to have both hands prospectively imaged with SE T1 Dixon, T1 CHESS, T2 Dixon, T2 CHESS and STIR sequences in a 1.5T MR scanner. Three radiologists scored the effectiveness of fat suppression in bone marrow (EFSBM) and soft tissues (EFSST) in 20 joints per subject. One radiologist measured the SNR in 10 bones per subject. Statistical analysis used two-way ANOVA with random effects, paired t-test and observed agreement to assess differences in effectiveness of fat suppression, differences in SNR and inter-observer agreement. RESULTS:EFSBM was statistically significantly higher for T1 Dixon than for T1 CHESS and for T2 Dixon than for T2 CHESS (p<0.0001). EFSBM was significantly higher for T2 Dixon than for STIR in the coronal plane (p=0.0020). The SNR was significantly higher for T1 Dixon than for T1 CHESS and for T2 Dixon than for STIR (p<0.0001). The SNR was significantly lower for T2 Dixon than for T2 CHESS (p<0.0001). CONCLUSION: The Dixon method yields more effective fat suppression and higher SNR than the CHESS technique at 2D T1-weighted MR imaging of the hands. At T2-weighted MR imaging, fat suppression is more effective with the Dixon method while SNR is higher with the CHESS technique.
Authors: Christina M Wendl; Johannes Eiglsperger; Lena-Marie Dendl; Harald Brodoefel; Karl-Michael Schebesch; Christian Stroszczynski; Claudia Fellner Journal: Br J Radiol Date: 2018-02-23 Impact factor: 3.039
Authors: Thomas Kirchgesner; Maria Stoenoiu; Patrick Durez; Nicolas Michoux; Bruno Vande Berg Journal: J Belg Soc Radiol Date: 2022-01-10 Impact factor: 1.894