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

Egyptian Journal of Radiology and Nuclear Medicine

Table 1 Parameters of the used MRI sequences used for direct and indirect fistulography

MRI sequences	Non-contrast scan		Non-contrast fat-suppressed scan		Contrast-enhanced fat-suppressed scans( Indirect fistulography)	Percutaneous contrast-enhanced scan (Direct fistulography)
	T1W TSE	T2W TSE	FS T1W TSE	FS T2W TSE	FS T1W TSE	FS T1W TSE
Imaging plane	Oblique axial and coronal	Oblique axial	Oblique axialAxial	Oblique axial	Oblique axial, coronal and sagittal	Oblique axial, coronal and sagittal
TR (ms)	619	5486	591	4577	450	450
TE(ms)	10	110	10	50	10	10
FOV (mm)	250	260	260	250	260	260
Section thickness (mm)	3	3	3	3	3	3
Intersection gap (mm)	0.6	0 to 0.6	0.6	0 to 0.6	0 to 0.6	0 to 0.6
NEX	2	2	2	2	2	2
Matrix size	288 × 320	230 × 256	288 × 320	230 × 256	288 × 320	288 × 320

MRI magnetic resonance imaging, TR repetition time, TE echo time, FOV field of view, T1W T1 weighted, T2W T2 weighted, TSE turbo spin echo, FS fat suppressed, NEX Number of excitations