The diagnostic value of combining conventional, diffusion-weighted imaging and dynamic contrast-enhanced MRI for salivary gland tumors

被引:38
|
作者
Zheng, Ning [1 ]
Li, Rui [1 ]
Liu, Wenjuan [1 ]
Shao, Shuo [1 ]
Jiang, Shan [1 ]
机构
[1] Jining 1 Peoples Hosp, Dept Radiol, Jining, Peoples R China
来源
BRITISH JOURNAL OF RADIOLOGY | 2018年 / 91卷 / 1089期
关键词
NEEDLE-ASPIRATION-CYTOLOGY; PAROTID-GLAND; HISTOPATHOLOGIC CORRELATION; WARTHIN TUMOR; BENIGN; DIFFERENTIATION; ACCURACY;
D O I
10.1259/bjr.20170707
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Objective: To determine the diagnostic value of combining conventional MRI, diffusion-weighted imaging (DWI) and dynamic contrast enhanced MRI (DCE-MRI) in salivary gland tumors. Methods: 45 patients with salivary gland tumors were evaluated with conventional MRI, DWI and DCE-MRI prior to surgery and confirmed by pathologic findings. The apparent diffusion coefficient (ADC) was calculated from DWI that was obtained with a factor of 0 and 1000 s mm(-2). A time-intensity curve (TIC) was obtained from DCE-MRI. Results: In conventional MRI, benign tumors often showed well-defined and clear margins, malignant tumors showed irregular margins or infiltration into the surrounding tissue. There were significant differences with regard to the ADC values between pleomorphic adenoma (1.72 +/- 0.29 x 10(-3) mm(2) s(-1)) and malignant tumors (0.95 +/- 0.09 x 10(-3) mm(2) s(-1) p < 0.05) and between adenolymphoma (0.74 +/- 0.05 x 10(-3) mm(2 )s(-1) and malignant tumors (p < 0.05). However, there was no significant differences in term of the ADC values between benign tumors (1.33 +/- 0.52 x 10(-3) mm(2) s(-1)) and malignant tumors. DCE-MRI showed benign tumors with A-type, B-type and D-type of TICs, and the malignant tumors with C-type TICs. A combination of all of these parameters yielded sensitivity, specificity, accuracy, and positive and negative predictive values of 90%, 97%, 95%, 90 and 97%, respectively. Conclusion: An evaluation combining MRI morphologic findings and functional MRI (ADCs and TIC) appears to be useful in differentiating benign from malignant tumors in salivary gland tumors. Advances in knowledge: The study firstly dealt with the combination of conventional MRI, DWI-MRI with DCE-MRI in salivary gland tumors.
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页数:10
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