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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 4 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 4

From: Direct hydrogen peroxide MRI fistulography versus indirect (intravenous) MRI fistulography in patients with perianal fistula

Fig. 4

A Axial, C coronal IV CE T1 FS (indirect fistulography), B axial, D Coronal T1 FS (direct fistulography), show supra-sphincteric complex fistula with a horseshoe collection (arrows) which is Cleary depicted using indirect fistulography (A, C), while the direct fistulography (B, D) shows only the fistula tract (block arrow) and could not identify the horseshoe collection

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