The value of synthetic MRI combined with amide proton transfer imaging in projecting IDH1 gene state in gliomas
Objective:To explore the value of synthetic magnetic resonance imaging(syMRI)combined with amide proton transfer(APT)in projecting the isocitrate dehydrogenase 1(IDH1)gene status in gliomas.Materials and Methods:A retrospective analysis was performed on 97 patients diagnosed with glioma with complete pathological data at the General Hospital of Ningxia Medical University from July 2019 to December 2023,including 57 cases of IDH1 mutant(IDH1-mut)and 40 cases of IDH1 wildtype(IDH1-wt),all of whom underwent preoperative pre-and post-contrast syMRI and APT scans,and their quantitative parameters T1-pre,T2-pre,T1-post,T2-post and APT values were measured.Independent samples t-tests or Mann-Whitney U-tests were used to analyse the differences between groups for each parameter,and the diagnostic efficacy of each single and combined parameter for IDH1 gene status was assessed using subject operating characteristic curves and binary logistic regression analyses.The DeLong test was used to compare the differences in AUC for each parameter.Results:APT values and T1-pre were higher in IDH1-wt than in IDH1-mut gliomas(P＜0.05);T1-pre and T2-pre were lower in IDH1-wt gliomas than in IDH1-mut gliomas(P＜0.01);and T2-pre was not statistically significant between the two groups(P=0.107).Among all single parameters,the APT value had the highest diagnostic efficacy for IDH1-mut versus IDH1-wt glioma,with an AUC of 0.867,which was higher than that of T1-pre,T1-post,and T2-post(AUC 0.620,0.811,and 0.723);the AUC of the multi-parameter combined prediction model(T1-pre+T1-post+T2-post+APT)had an AUC of 0.886,a sensitivity of 80.7％,and a specificity of 85.0％,which was higher than that of any single parameter.The DeLong test showed that the diagnostic efficacy of the multi-parameter combined prediction model was superior to the T1-pre,Tl-post,and T2-post values(P＜0.05),whereas there was no significant difference in the AUC with APT(P=0.208).Conclusions:syMRI combined with APT is useful for preoperative noninvasive prediction of IDH1 gene status in gliomas,and the highest efficacy was achieved when the two were used in combination for diagnosis.
gliomamagnetic resonance imagingsynthetic magnetic resonance imagingamide proton transfer imagingisocitrate dehydrogenase 1prediction
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