Abstract #2556

Effect of Rectal Gas on Susceptibility Artifact in Prostate DWI

Eun Bin Lee¹, Ely Felker², David Lu², Kari Sorge², and Kyunghyun Sung¹

¹Bioengineering, Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States, ²Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, United States

Diffusion-weighted imaging (DWI) is a key component of multi-parametric prostate MRI; however, DWI is prone to susceptibility artifact occurring in the peripheral zone, where 70% of tumors are found. The purpose of this study was to qualitatively and quantitatively assess the effect of rectal gas on the presence of this artifact. The study found that in cases with no rectal gas (<2cm³), image quality is excellent as a rule. When more than 2cm³ of gas is present, a range of image quality is seen that is not correlated to the amount of gas present.

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