Preoperative evaluation of pancreaticobiliary tumor using MR multi-imaging techniques

Table 1 Pancreaticobiliary diseases (n = 28).

Pancreaticobiliary diseases	Number of cases
Pancreatic head carcinoma	14
Pancreatic body carcinoma	3
Gall bladder carcinoma	2
Hilar cholangiocarcinoma	3
Common bile duct carcinoma	3
Chronic pancreatitis	2
Common bile duct stone	1

Table 2 MR multi-imaging technique parameters.

Protocol angulation	T1WI/SPIR transversal	T2WI/SPIR transversal	T2WI coronal	MRCP coronal	DCE MRA coronal
Sequence	TSE/SE	TSE	TSE	TSE	FFE
TR (ms)	575/500	1 800	1 800	2 000	11
TE (ms)	12/15	99/80	100	700	2.5
FOV (mm)	345/375	345	435	395	450
Matrix	176×256	203×256	202×256	190×256	164×512
No. of slices	16	16	18	50	50
Thickness (mm)	10	10	6	2	2
Gap (mm)	1	1	0.6	0	0
Fast factor	4/-	18/14	23	101	-
NSA	5/2	4	4	2	1
Respiratory	Trigger	Trigger	Trigger	Trigger	Breath-hold

TR: time of repeat; TE: time of echo; FOV: field of view; NSA: number of signal average.

Table 3 Detection of range of pancreaticobiliary tumor invasion.

	MR finding (n)	Final diagnosis (n)	Percentage (%)
Adjacent organ infiltration	15	17	88.2
Liver metastases	4	5	80.0
Lymph node involvement	10	13	76.9
Arterial involvement	8	13	61.5
Portal venous involvement	17	20	85.0
Peritoneal carcinomatosis	3	3	100.0
Total	57	71	80.3

Table 4 Assessment of resectability of pancreaticobiliary tumor (n).

MR multi-imaging techniques	Final diagnosis
	Resectability	Unresectability
Resectability	51	22
Unresectability	13	174

¹True-positive,

²Negative-positive,

³False-negative,

⁴True-negative.

Table 5 Comparison between MR and CT in tumor resectability assessment (n).

MR multi-imaging techniques	CT diagnosis
	Resectability	Unresectability
Resectability	6	1
Unresectability	3	15