| Objective: To explore the correlationbetween the horizontal angle and angular direction of the head segment of the main pancreatic duct and acute pancreatitis.Methods: Data of 213 cases with acute pancreatitis, which were diagnosed clinically through the upper abdominal MRI examination, were retrospectively collected. According to the inclusion and exclusion criteria, 60cases(38 male,and the average age was 45) were selected as the observation group. Meanwhile, a normal control group of 43 cases(22 male,and the average age was 53), was collected. MRCP was administered to the two groups and the data were respectively transmitted to the image post-processing station. At the clear and complete MRCP image layer of the main pancreatic duct, the inclinations between the head segment of the main pancreatic duct and the horizontal line, and between the line connecting the head and the tail and the horizontal line were continuously measured three times, and all the data of the average angles and the directions of the horizontal angle of the head segment were recorded for statistical analysis.Results: In the group of acute pancreatitis, the inclinations between the head segment of the main pancreatic duct and the horizontal line, and between the line connecting the head and the tail and the horizontal line were25.64±20.32° and 28.07±11.11°, respectively; while in the normal control group, the angles were 30.56±18.56 and 28.65±10.49°( t=1.254/0.253;P=0.213/0.801). In the groupof 60 cases ofacute pancreatitis, 36 cases’ angular directions of the head segment of the main pancreatic duct were upward and the inclination between the head segment and the horizontal linewas 32.19±23.19°; and 24 cases’ angular directionswere downward and the inclination was 16.08±8.80°. Among the 43 cases of the normal control group, 37 cases’ angular directionswere upward and the inclinationbetween the head segment and the horizontal line was 32.77±18.91°; and 6cases’ angular directions were downward and the inclination was 16.94±7.66°.In both groups, no statistical significance was found in the angular directions(upward and downward) and the inclinationbetween the head segment of the main pancreatic duct and the horizontal line(t=0.117/0.219; P=0.907/0.828);while there existed statistical difference in the angular directions of the head segment of the main pancreatic duct and the horizontal line( χ2=8.232,P=0.004). Among all the cases, statistical difference(t=4.146,P=0.000)was found between the average upward angle(32.48±20.98°)and the average downward angle(16.06±8.32°).Conclusion: Acute pancreatitis has no correlation with the horizontal angle of the head segment of the main pancreatic duct, but has close relationship with the angular direction of the horizontal angle. Clinically,acute pancreatitis mainly has a downward angular direction.Objective: To study the changes of the volume and morphologic characteristics of the main pancreatic duct in patients with acute pancreatitis through MRCP.Method: According to the inclusion and exclusion criteria, fifty patients with acute pancreatitis were recruited as the study group(28 males and 22 females, and the average age 51±15 years). Meanwhile, 49 normal cases without any pancreatic diseases were collected as the control group(28 males and 21 females, and the average age 48±13 years).All the subjects underwent MRI and MRCP examinations, and all data were transmitted to the image post-processing workstation. Two readers measured the volume of the main pancreatic duct on the 3D MRCP coronal image together, and graded the severity of the acute pancreatitis according to MRSI. Meanwhile, the two readers observed the pattern of the pancreatic duct based on 2D MRCP. The difference in the main pancreatic duct volume in groups with different severity was tested using One-Way ANOVA. Relationship between the volume and the severity was tested using Spearman’s rank test. The difference between the coursing pattern of main pancreatic duct of the control and acute pancreatitis groups was tested using chi-square test.Result: The volume of pancreatic duct in the normal group was1.303±0.325 cm3, the minimum value was 0.799 cm3, the maximum value was 2.012 cm3, and the quartiles were 1.051,1.234,1.562; the volume of theacute pancreatitis group was 1.681±1.569 cm3, the minimum value was 0.367cm3, the maximum value was 7.707 cm3, and the quartiles were 0.872,1.340,1.828. There was no statistical significance in the volume between control and acute pancreatitis groups(Z-0.035, P 0.972). There was no statistical difference in the coursing patterns between the normal and acute pancreatitis groups(χ2 1.060, P 0.588). There was no statistical difference in the volume among the groups with different severity. The volume was negatively correlated with the severity scores defined by MRSI(P 0.041, correlation coefficient-0.290).Conclusion: The volume of pancreatic duct in the normal group was1.303±0.325 cm3. In the acute pancreatitis patients, there was no significant difference of the main pancreatic duct volume, but the volume was negatively correlated with the severity scores defined by MRSI. |
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