Fat suppression at three-dimensional T1-weighted MR imaging of the hands: Dixon method versus CHESS technique - 05/01/18
, V. Perlepe , N. Michoux , A. Larbi , B. Vande Berg
Benvenuto su EM|consulte, il riferimento dei professionisti della salute.
Articolo gratuito.
Si connetta per beneficiarne
Highlights |
• | Dixon yields effective fat suppression at 3D T1-weighted MRI of the hands. |
• | SNR is higher with Dixon than with CHESS at 3D T1-weighted MR imaging of the hands. |
Abstract |
Purpose |
To compare the effectiveness of fat suppression and the image quality of the Dixon method with those of the chemical shift-selective (CHESS) technique in hands of normal subjects at non-enhanced three-dimensional (3D) T1-weighted MR imaging.
Materials and methods |
Both hands of 14 healthy volunteers were imaged with 3D fast spoiled gradient echo (FSPGR) T1-weighted Dixon, 3D FSPGR T1-weighted CHESS and 3D T1-weighted fast spin echo (FSE) CHESS 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 signal-to-noise ratio (SNR) in 10 bones per subject. Statistical analysis used two-way ANOVA with random effects (P<0.0083), paired t-test (P<0.05) and observed agreement to assess differences in effectiveness of fat suppression, differences in SNR and interobserver agreement.
Results |
EFSBM was statistically significantly higher for the 3D FSPGR T1-weighted Dixon than for the 3D FSPGR T1-weighted CHESS sequence and the 3D FSE T1-weighted CHESS sequence (P<0.0001). EFSST was statistically significantly higher for the 3D FSPGR T1-weighted Dixon than for the 3D FSPGR T1-weighted CHESS sequence (P<0.0011) and for the 3D FSE T1-weighted CHESS sequence in the axial plane (P=0.0028). Mean SNR was statistically significantly higher for 3D FSPGR T1-weighted Dixon sequence than for 3D FSPGR T1-weighted CHESS and 3D FSE T1-weighted CHESS sequences (P<0.0001).
Conclusion |
The Dixon method yields more effective fat suppression and higher SNR than the CHESS technique at 3D T1-weighted MR imaging of the hands.
Il testo completo di questo articolo è disponibile in PDF.Keywords : MRI, Fat, Dixon, IDEAL, Hands
Abbreviations : CHESS, EFSBM, EFSST, FSE, FSPGR, ROI, SNR
Mappa
Vol 99 - N° 1
P. 23-28 - Gennaio 2018 Ritorno al numero
Articolo precedente
- Expanding role of percutaneous cholecystostomy and interventional radiology for the management of acute cholecystitis: An analysis of 144 patients
- D. Kim, S.I. Iqbal, H.K. Ahari, C.P. Molgaard, S. Flacke, B.D. Davison
- T1-weighted parenchyma attenuated inversion recovery: A novel sequence that improves contrast ratio of enhancing brain lesions
- A. Batouli, E. Kanal, A. Gholamrezanezhad, M. Spearman
Benvenuto su EM|consulte, il riferimento dei professionisti della salute.