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| Application of coefficient variance of apparent diffusion coefficient value in differentiating pancreatic carcinoma from focal pancreatitis |
| CHANG Na, GUO Qi-yong, YU Bing, MA Yue, REN Ying |
| Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China |
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Abstract Objective: To evaluate the usefulness of coefficient variance(CV) of apparent diffusion coefficient(ADC) value in differentiating pancreatic carcinoma from focal pancreatitis. Methods: Diffusion weighted MR data were obtained from 28 patients of pancreatic carcinoma and 7 patients of focal pancreatitis. The mean value(x) and standard deviation(s) of ADC value in every lesion were measured. The CV of the lesion was defined as CV＝s/x. The x values and CVs were compared between groups using Student’s t test. Result: The mean value of pancreatic carcinoma was 1.46±0.29, and the mean value of focal pancreatitis was 1.58±0.28. There were no obvious differences between the mean value of pancreatic carcinoma and focal pancreatitis(t=1.02, P=0.32). CV of pancreatic carcinoma was 0.16±0.06, and CV of focal pancreatitis was 0.10±0.04. CV of pancreatic carcinoma was significantly higher than that of focal pancreatitis(t=2.44, P=0.02). Conclusion: The CVs of ADC values in lesions were more useful than that of mean value to distinguish pancreatic carcinoma and focal pancreatitis.
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Received: 16 July 2013
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Corresponding Authors:
GUO Qi-yong
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2014, Vol. 25 
