小视野高清DWI在鉴别胰腺良恶性肿瘤中的应用OA

Objective:To explore the application value of field-of-view optimized and constrained undistorted single-shot DWI(FOCUS-DWI)in differentiating benign and malignant pancreatic tumors.Methods:A total of 55 pancreatic tumor patients who underwent MRI examination were prospectively collected,including 23 cases with benign tumors and 32 cases with malignant tumors.All patients underwent conventional DWI and FOCUS-DWI scanning,and the SNR,CNR and ADC values of the images were measured and analyzed,and the image quality was subjectively evaluated.The paired t test was used to analyze the differences in SNR,CNR,ADC values and subjective scores between conventional DWI images and FOCUS-DWI images,while the independent-sample t test was used to anlayze the differences in SNR,CNR and ADC values between benign and malignant tumors.Results:The FOCUS-DWI images had the higher scores of deformation distortion and artifacts,anatomical details and lesion conspicuity,and higher SNR,CNR values compared with the conventional DWI images,and all differences were statistically significant(all P<0.05).The ADC values in the conventional DWI and FOCUS-DWI images of benign tumors were higher than those of malignant tumors(both P<0.05).The ADC value of benign tumors in conventional DWI images was lower than that in FOCUS-DWI images,while the ADC value of malignant tumors in conventional DWI images was higher than that in FOCUS-DWI images(both P<0.05).The dispersion of ADC values of benign tumors in the conventional DWI and FOCUS-DWI images were 23.2％(0.64/2.76)and 21.6％(0.65/3.01),while those of malignant tumors were 9.7％(0.15/1.55)and 10.2％(0.14/1.37),respectively.Conclusion:FOCUS-DWI can improve the image quality of pancreatic tumors and demonstrates promising clinical potential.