A Pilot Study on the Application of FFE and SSh-TSE Sequences in Ocular MRI

摘要

Purpose:To preliminarily investigate the application value of rapid sequences FFE and SSh-TSE in ocular magnetic resonance imaging(MRI).Methods:Ocular MRI was performed in 18 subjects without ocular conditions,and demonstration of 15 delicate anatomic structures on two sequences in each subject was rated by three proficient physicians.Results:FFE sequence was comparatively advantageous in demonstrating delicate structures on ocular wall and ocular adnexa(P<0.001) over SSh-TSE;while SSh-TSE sequence better revealed the delicate anatomy within anterior chamber(P<0.001) and optic nerve sheath(P<0.05),with statistically significant differences compared with FFE.Conclusion:Optimized FFE and SSh-TSE sequences are able to effectively eliminate the impact from motion artifact and thus result in desirable images with high spatial resolution.The application of high-resolution MR microscopic imaging technique has improved the ability to demonstrate delicate ocular structures.