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Head and Neck Imaging订阅

The Comparison of Application Value Between the Two Different b Value of DWI in Rectal Cancer*

Author：YIN Yi-li, YE Jing, ZHANG Hong-ying.

affiliation：Department of Radiology, the Subei People's Hospital, Yangzhou 225001, Jiangsu Province, China

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Abstract

Objective To compare the appicaiton value btween the two different high b value of diffusion weighted imaging (DWI) in colorectal carcinoma. Methods All patients with rectal carcinoma underwent conventional scanning and DWI scanning by 3.0T MRI. In DWI, two different b value (1000 and 2500s/mm2 )were used. The ADC value of tumor and ipsilateral gluteus maximus under different b value on DWI were measured and compared. Results When b value is 1000s/mm2 , ADC value in tumor was (0.923±0.15)×10-3mm2 /s, and in glutes were (1.57±0.091)×10-3mm2 , when b value is 2500s/mm2, ADC value in tumor was (0.642±0.07)×10-3mm2 /s, and in glutes were (0.925±0.12)×10-3mm2 /s. There was significant difference in ADC ratio of tumor and glutes between the two groups. Conclusion The value of ADC ratio in the group which b value is 1000 s/mm2 was higher than that whose b value is 2500s/mm2 , ADC value can be used as a index of diagnosis and prognosis evaluation for rectal cancer.

【Keyword】Colorectal Cancer; Diffusion Weighted Imaging; b Value

【Chart number】R445.2；R735.3+7

【Document Identification Number】A

【DOI】 10.3969/j.issn.1672- 5131.2016.09.028

Chinese journal of CT and MRI

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