Comparative study of StarGVIBE and VIBE sequences in MRI of esophagus / 实用放射学杂志

ABSTRACT

Objective To explore the feasibility of the Star-VIBE sequence in esophageal MRI,and compare it with the conventional VIBE sequence.Methods Fifteen healthy volunteers underwent Star-VIBE and VIBE sequences scanning after injecting MRI contrast agent.Two groups of MR images were independently scored in the ability to display esophageal wall,respiratory motion artifacts,cardiovascular pulsation artifacts,overall motion artifacts and overall image quality by the two radiologists,respectively.SNR of esophagus,CNR between esophagus and paravertebral muscles were measured and compared.Results Star-VIBE was superior to VIBE in the ability to display esophageal wall,respiratory motion artifacts,cardiovascular pulsation artifacts,overall motion artifacts and overall image quality (the ability to display esophageal wallZ＝－3.268,P＝0.001;respiratory motion artifactsZ＝－3.205,P＝0.001;cardiovascular pulsation artifactsZ＝－4.644, P＝0.000;overall motion artifactsZ＝－3.904,P＝0.000;overall image qualityZ＝－2.808,P＝0.005),while no significant differences were found on SNR and CNR between the two sequences (SNRt＝－1.5 3 9 ,P＝0.1 3 5 ;CNRt＝－0.874,P＝0.3 89 ).Conclusion The Star-VIBE sequence is insensitive to the physiological motion artifacts,and it can provide better image quality than the conventional VIBE sequence in esophageal MRI.