Improvement of Fat Suppression and Artifact Reduction Using IDEAL Technique in Head and Neck MRI at 3T
Investigative Magnetic Resonance Imaging
; : 44-52, 2016.
Article
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| WPRIM
| ID: wpr-221981
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WPRO
ABSTRACT
PURPOSE: To quantitatively and qualitatively compare fat-suppressed MRI quality using iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) with that using frequency selective fat-suppression (FSFS) T2- and postcontrast T1-weighted fast spin-echo images of the head and neck at 3T. MATERIALS AND METHODS: The study was approved by our Institutional Review Board. Prospective MR image analysis was performed in 36 individuals at a single-center. Axial fat suppressed T2- and postcontrast T1-weighted images with IDEAL and FSFS were compared. Visual assessment was performed by two independent readers with respect to; 1) metallic artifacts around oral cavity, 2) susceptibility artifacts around upper airway, paranasal sinus, and head-neck junction, 3) homogeneity of fat suppression, 4) image sharpness, 5) tissue contrast of pathologies and lymph nodes. The signal-to-noise ratios (SNR) for each image sequence were assessed. RESULTS: Both IDEAL fat suppressed T2- and T1-weighted images significantly reduced artifacts around airway, paranasal sinus, and head-neck junction, and significantly improved homogeneous fat suppression in compared to those using FSFS (P < 0.05 for all). IDEAL significantly decreased artifacts around oral cavity on T2-weighted images (P < 0.05, respectively) and improved sharpness, lesion-to-tissue, and lymph node-to-tissue contrast on T1-weighted images (P < 0.05 for all). The mean SNRs were significantly improved on both T1- and T2-weighted IDEAL images (P < 0.05 for all). CONCLUSIONS: IDEAL technique improves image quality in the head and neck by reducing artifacts with homogeneous fat suppression, while maintaining a high SNR.
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1
Base de datos:
WPRIM
Asunto principal:
Patología
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Imagen por Resonancia Magnética
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Agua
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Estudios Prospectivos
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Artefactos
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Comités de Ética en Investigación
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Relación Señal-Ruido
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Cabeza
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Ganglios Linfáticos
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Boca
Tipo de estudio:
Observational_studies
Idioma:
En
Revista:
Investigative Magnetic Resonance Imaging
Año:
2016
Tipo del documento:
Article