This study investigated ZOOMit and RESOLVE DWI sequences to compare of the image quality of anal canal and the visibility of the fistula. The results showed that both ZOOMit DWI and RESOLVE DWI obtained high quality images， ZOOMit DWI sequence had higher fistula visibility and SNR of the fistula than those of RESOLVE DWI sequence. Our findings also suggest that ZOOMit DWI can be used as the preferred sequence for anal MR diffusion imaging.
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