Objective:

To compare the fat suppression effect and clinical application of iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) sequence with frequency-selective fat saturation (FS) technology in oral and maxillofacial MRI examinations.

Methods:

The data of 20 cases who underwent oral and maxillofacial MRI

examinations using routine MRI sequence

FS-T2WI sequence and IDEAL-T2WI sequence scanning were collected. The total image quality and fat suppression effect of FS-T2WI and water image of IDEAL-T2WI were comparatively analyzed and scored in each case

and signal-to-noise ratio (SNR) efficiencies in the tongue

parotid gland

subcutaneous fat and splenius capitis were compared.

Results:

All cases obtained clear and high SNR water images of IDEAL-T2WI

and the fat suppression effect was uniformity and reliable. The scores of total image quality and fat suppression effect was 3.9240.221 and 3.9090.232

respectively. The SNR efficiencies in the tongue

parotid gland

subcutaneous fat and splenius capitis were 0.8880.123

1.0500.126

1.0920.128

0.8430.114

respectively. There was non-uniform fat suppression effect on FS-T2WI images. The scores of total image quality and fat suppression effect was 2.4240.453 and 2.3790.434

respectively. The SNR efficiencies in the tongue

parotid gland

subcutaneous fat and splenius capitis were 0.3510.044

0.4520.068

0.3350.073

0.5150.055

respectively. There were statistically significant differences between IDEAL-T2WI and FS- T2WI (

P

0.05).

Conclusion:

IDEAL-T2WI can obtain clear image

uniform and reliable fat suppression effect

high SNR. It is better than FS-T2WI

and helpful for the detection of oral and maxillofacial diseases.