Biliary reflux detection in anomalous union of the pancreatico-biliary duct patients

Table 1 Protocol for gadoxetic acid-enhanced functional magnetic resonance cholangiography at our institution

	T2-MRC (single shot, SPAIR)			Gadoxetic acid-enhanced MRC (3D-T1-TFE, eTHRIVE)
	Axial	Coronal	MRCP slab	Axial	Coronal	MIP
TR/TE (ms)	1475/80	2415/235	10 695/920	3/2	3/2
Flip angle (°)	90	90	90	10	10
Field of view (mm)	300 × 350	350 × 350	250 × 250	304 × 330	350 × 350	315 × 315
Matrix	276 × 203	256 × 254	256 × 256	220 × 222	292 × 292	292 × 292
Thickness (mm)	4	2	40	4	2.4
Gap (mm)	1.2	1		2	1.2

MRC: Magnetic resonance cholangiography; SPAIR: Spectral attenuation with inversion recovery; THRIVE: T1-weighted high-resolution isotropic volume excitation; MIP: Maximum intensity projection; TR: Repetition time; TE: Echo time; MRCP: Magnetic resonance cholangiopancreatography.

Table 2 Study results

					T2-MRC	Gd-EOB-DTPA-enhanced MRC
Sex	Age	Type of choledochal cyst1	Type of AUPBD2	Surgery	CBD stone	BP	PB	Travel extent of contrast on pre-prandial images3	Travel extent of contrast on post-prandial images4
F	52	Ia	B-P	Yes	No	Yes	NI	MPD	MPD
M	64	Ia	B-P	Yes	No	Yes	NI	CBD	MPD
M	46	None	B-P	No	No	NI	Yes	CHD5	CBD
F	35	Ia	P-B	Yes	Yes	NI	NI	CHD	CHD
F	48	Ia	B-P	Yes	No	Yes	NI	CBD	MPD
F	40	Ic	P-B	Yes	No	NI	Yes	CHD6	CBD

¹Todani classification of choledochal cyst;

²Kimura classification of anomalous union of pancreatico-biliary duct (AUPBD);

³extent of contrast material on gadoxetic acid-enhanced magnetic resonance cholangiography (MRC) 60 min after administration;

⁴extent of contrast material on gadoxetic acid-enhanced MRC 30 min after a fatty meal;

⁵filling defect of contrast material in common bile duct (CBD);

⁶filling defect of contrast material in CBD. Biliary amylase level: 133 000 (IU/L). Gd-EOB-DTPA: Gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid; BP: Biliopancreatic reflux; PB: Pancreatico-biliary reflux; MPD: Main pancreatic duct; CHD: Common hepatic duct; NI: Not identified.