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Objective: To observe features of tuberculosis in epididymis and testis on plain MRI, diffusion weighted imaging (DWI) and dynamic contrast enhanced (DCE). Methods: MRI features of 15 patients with epididymal and testicular tuberculosis (case group) confirmed by pathology and 20 normal testes of 10 patients with other diseases (control group) were retrospectively analyzed. Results: Among case group, 2 cases were unilateral epididymis tuberculosis, 11 cases were unilateral epididymis and testicular tuberculosis, 1 case was bilateral epididymis tuberculosis involving bilateral vas deferens, seminal vesicle gland and prostate, and 1 case was bilateral epididymis and testicular tuberculosis involving prostate. Epididymal and testicular lesions present as low mixed signal on T1WI, with few spot shape high signal, and the signal intensity was equal, whereas as high and slightly low signal on T2WI. The lesions were slightly high or ring-like high signal on DWI, with decreased ADC values. DCE showed inhomogeneous enhancement, and the ring enhancement characteristics became more obvious with time going. Thickening wall and enhancement of ductus deferens, non-enhanced patchy in prostate and multiple ringlike enhancement in seminal vesicle were also observed on DCE. Conclusion: MRI could be used to accurately assess epididymal and testicular tuberculosis involved organs of generation. DWI and DCE had high diagnostic value for tuberculosis in epididymis and testis.
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Purpose To explore the application of single index,double exponential and tensile density index model diffusion weighted imaging and other parameters on endometrial carcinoma diagnosis to offer new ideas for it.Materials and Methods Intravoxel incoherent motion imaging data of 28 endometrial carcinoma patients and 24 patients of normal endometrium were analyzed retrospectively.Single index,double exponential and DWI parameter of endometrial carcinoma tissue and normal endometrial tissue were measured respectively,including standard apparent diffusion coefficient (ADC-stand),slow apparent diffusion coefficient (ADC-slow),fast apparent diffusion coefficient (ADC-fast,perfusion fraction (f),distributed diffusion coefficient (DDC) and a.Receiver operator characteristic (ROC) curve was adopted to assess threshold value and diagnostic efficiency of each parameter,and analyzed difference among each parameter in two groups and relativity of each parameter in the same group.Results ADC-stand,ADC-slow,f,DDC and a in endometrial carcinoma group were all lower than those in normal endometrium group.The difference was statistically significant (P＜0.05).The difference of ADC-fast was not statistically significant (P＞0.05).Areas of ADC-stand and ADC-slow on ROC curve were 0.949 and 0.911 respectively,and threshold values were 1.245×10-3 mm2/s and 0.998× 10-3 mm2/s.ADC-stand in endometrial carcinoma group was positive correlated with ADC-slow and DDC value (r=0.787 and 0.880,P＜0.05).ADC-slow was significantly lower than ADC-stand (P＜0.05).Conclusion The differences in single index,double exponential and DWI can provide new ideas for endometrial carcinoma diagnosis.