Application value of liver acquisition with volume acceleration sequence enhancement scanning in intracranial lesions

CHEN Peng; LI Ruixiong; MAI Naiquan; YAN Jianming

doi:10.19300/j.2018.L5410

Abstract：Objective To explore the application value of liver acquisition with volume acceleration(LAVA)se-quence enhancement scanning in intracranial lesions. Methods A total of 40 patients with intracranial lesions underwent cranial enhanced MRI examination.Of the 40 patients,19 were male and 21 were female,and the mean age was 48.1 ±16.1 years old (ranging from 12-80 years old).Both LAVA and fast inversion recovery (FIR)T1WI sequence enhanced scanning were performed,followed by measurement of the signal-to-noise ratio(SNR),contrast to noise ratio(CNR)and area of the le-sions on the two sequences.Group differences were evaluated with Wilcoxon signed rank test.The group comparison of inci-dence of vascular flow artifact,the lesion boundary and signal were assessed with paired χ2test.Results There were no sig-nificant difference in the lesion boundary,signal and area on FIR T1WI and LAVA(all P>0.05).The SNR,CNR and the inci-dence of vascular flow artifact of the two methods were 74.75(59.29~103.17)and 26.72(22.61~34.78),41.67(28.21~65.92) and 22.89 (14.76~32.27),90% and 27.5%,respectively (all P<0.001).The scanning time was 195 s and 87 s,respectively. The feeding artery and draining vein in 6 cases,sinus thrombosis in 3 cases and aneurysm in 2 cases were detected with the LAVA sequence,whereas the lesions could not be detected on the FIR T1WI sequence.The numbers of lesions in 7 patients with metastases were 35 and 30,respectively,on the LAVA and FIR T1WI sequences.Conclusion The intracranial lesion and the blood vessels can be identified with LAVA sequence enhancement scanning which has shorter scanning time and lower occurrence rate of blood flow artifact compared with FIR T1WI sequence.LAVA sequence possesses greater clinical ap-plication value.