Evaluation of soft tissue lesions affecting the masticator space with dynamic contrast enhanced MRI
10.3760/cma.j.issn.1002-0098.2013.12.003
- VernacularTitle:动态增强MRI诊断咀嚼肌间隙软组织病变的临床价值
- Author:
Wei-Qing TANG
1
;
Wei-Jie LE
;
Ping-Zhong WANG
;
Hui-Min SHI
;
Qiang YU
Author Information
1. 200011,上海交通大学医学院附属第九人民医院口腔医学院放射科上海市口腔医学研究所上海市口腔医学重点实验室
- Keywords:
Magnetic resonance imaging;
Masticatory space;
Tumor and tumor-like lesion
- From:
Chinese Journal of Stomatology
2013;48(12):711-715
- CountryChina
- Language:Chinese
-
Abstract:
Objective To determine the characteristics and diagnostic value of dynamic contrast enhanced MRI(DCE-MRI) in differentiating benign soft tissue lesions from malignant tumors affecting the masticator space(MS).Methods Prior to managements,conventional MRI and DCE-MRI were performed in 53 patients who suffered from primary or secondary soft tissue lesions affecting the MS.The time to peak (TTP),relative maximum enhancement (RME) and relative washout ratio (RWO) were separately calculated.Results Mean TTP of benign and malignant lesions were (130.3 ± 13.2) and (69.6 ± 6.9) s,respectively.Mean RWO of benign and malignant lesions were (29.7 ± 5.5) ％ and (8.7 ± 2.1) ％,respectively.Malignant lesions had a significantly shorter TTP(P =0.001) and lower RWO (P =O.003) than benign lesions.When TTP was less than 92.2 s and RWO less than or equal to 16.0％,malignant tumors were considered.DCE-MRI had a sensitivity of 72.3％,specificity of 93.5％,accuracy of 84.9％,positive predictive value of 88.9％,and negative predictive value of 82.9％.Conclusions As a noninvasive imaging technique,DCE-MRI is valuable to differentiate benign soft tissue lesions from malignant tumors affecting the MS.
