The value of DWI for the diagnosis of ovarian lesions

VernacularTitle:不同b值DWI在卵巢良恶性囊实性病变中的诊断价值
Author: Peng KONG ; Lingping MENG ; Bin YANG ; Jianguo WANG
Keywords: ovary lesions; diffusion-weighted imaging
From: Journal of Practical Radiology 2017;33(6):587-590,610
CountryChina
Language:Chinese
Abstract: Objective To investigate the diagnostic value of diffusion-weighted imaging (DWI) in ovarian cystic or solid lesions with different b values.Methods 95 patients,total 105 lesions,including 61 benign lesions (53 cystic,19 solid) and 33 malignant lesions (10cystic,23 solid) with ovarian cystic or solid lesions underwent traditional MRI and DWI.The scan sequence of DWI was SE-EPI,with the b values of 0,500,1 000 s/mm2.The contrast to noise ratio (CNR) was calculated to evaluate the image quality.The apparent diffusion coefficient (ADC) value and exponent apparent diffusion coefficient (eADC) value of ovarian masses were measured.Results With the increase of b values,the signal and CNR of ovarian masses was decreased,and the intensity of cystic component was sharper than that of solid component.There was no signifi cant difference of the ADC values and eADC values between the benign and malignant ovarian cystic masses (P＞0.05).But the results had significant difference between the benign and malignant ovarian solid masses (P＜0.05).Conclusion Quantitative analysis of ADC and analysis the characteristic of CNR will help the differential diagnosis of some benign and malignant ovarian diseases.