Values of MRI-and CT-based volume mismatch ratios of bilateral paramedian thalamic lesions for discriminating thalamic tumors
10.19745/j.1003-8868.2023230
- VernacularTitle:基于MRI及CT的双侧中线旁丘脑病灶体积错配比在丘脑肿瘤诊断中的价值
- Author:
Lu SU
1
;
Jian ZHOU
;
Jing XUE
;
Pei-Yi GAO
Author Information
1. 首都医科大学附属北京天坛医院放射科,北京 100070
- Keywords:
bilateral paramedial thalamus;
MRI;
CT;
volume mismatch ratio;
thalamic tumor
- From:
Chinese Medical Equipment Journal
2023;44(11):61-65
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the values of MRI-and CT-based volume mismatch ratios of bilateral paramedian thalamic lesions in the diagnosis of thalamic tumors.Methods The medical records of 37 patients with bilateral paramedian thalamic tumors(tumor group)and 36 non-tumor patients(non-tumor group)diagnosed from March 2012 to May 2023 in some hospital were analyzed retrospectively.The anteroposterior,left-right,and upper and lower diameters of the lesions on both sides were measured and their volumes were calculated on MRI and CT images by 2 observers,and the volume mismatch ratio between the two sides of the lesions was computed.Intra-class correlation efficiency(ICC)was used to explore the consistency of the calculation results between the two observers,the difference between the volume mismatch ratios of the two groups were compared with t-test,and the diagnostic efficacy of the volume mismatch ratio of bilateral paramedian thalamic lesions on MRI and CT images for diagnosing thalamic tumors was investigated with ROC curves.Statistical analysis was carried out with SPSS 26.0 software.Results The volume mismatch ratios of bilateral paramedian thalamic lesions calculated by the 2 observers were in good agreement(1CCMRI=0.9 10,P＜0.001;ICCCT=0.929,P＜0.001).The volume mismatch ratios of lesions in the tumor group were all higher than those in the non-tumor group,and the differences were statistically significant(tMRI=2.621,PMRI=0.011;tCT=2.500,PCT=0.015).ROC curve analysis showed that the AUC values,diagnostic thresholds,diagnostic sensitivities and diagnostic specificities of the volume mismatch ratios of bilateral paramedian thalamic lesions on MRI and CT images for the diagnosis of thalamc tumors were 0.788 and 0.749,1.769 and 1.742,83.8％and 70.3％and 77.8％and 77.8％,respectively,and the Youden indices were 61.6％and 48.1％.Conclusion MRI-and CT-based volume mismatch ratios of bilateral paramedian thalamic lesions are of significane for the diagnosis of thalamic tumors,and CT behaves slightly worse than MRI in diagnosis efficacy and can be used for initial screening.[Chinese Medical Equipment Journal,2023,44(11):61-65]
