Improvement of Fat Suppression and Artifact Reduction Using IDEAL Technique in Head and Neck MRI at 3T.
10.13104/imri.2016.20.1.44
- Author:
Jin Ho HONG
1
;
Ha Young LEE
;
Young Hye KANG
;
Myung Kwan LIM
;
Yeo Ju KIM
;
Soon Gu CHO
;
Mi Young KIM
Author Information
1. Department of Radiology, Inha University Hospital, Inha University School of Medicine, Incheon, Korea. pengoon@gmail.com
- Publication Type:Original Article
- Keywords:
IDEAL;
Fat saturation;
Head and neck MR;
Susceptibility artifact;
Metallic artifact
- MeSH:
Artifacts*;
Ethics Committees, Research;
Head*;
Lymph Nodes;
Magnetic Resonance Imaging*;
Mouth;
Neck*;
Pathology;
Prospective Studies;
Signal-To-Noise Ratio;
Water
- From:Investigative Magnetic Resonance Imaging
2016;20(1):44-52
- CountryRepublic of Korea
- Language:English
-
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.
