Branch duct-type intraductal papillary mucinous tumor: diagnostic value of multiplanar reformatted images in multislice CT

Abstract

The object of this study was to evaluate the usefulness of high-resolution multiplanar reformatted (MPR) images obtained by multislice CT in demonstrating connection between pancreatic cystic lesions and the main pancreatic duct. The study included 27 lesions with connection to the main pancreatic duct and 12 lesions without. All but one of the former lesions were branch duct-type intraductal papillary mucinous tumors (IPMTs). Oblique and curved MPR images with 0.5 mm continuous slices were generated from pancreatic-phase axial images reconstructed with 0.5 mm or 1 mm thickness at 0.5 mm intervals over a 260 mm field of view. The diagnostic capabilities for demonstrating connection with the main pancreatic duct were compared among axial images, MPR images, and both axial and MPR images in combination using the Brier score. The diagnosis in MPR images for demonstrating connection was more certain than that in axial images (P<0.05). Compared with MPR images alone, the use of both axial and MPR images resulted in further improvements in diagnostic performance, although the difference was not statistically significant. The use of high-resolution MPR images significantly improves diagnostic performance for demonstrating connection between pancreatic cystic lesions and the main pancreatic duct, which is useful for the diagnosis of branch duct-type IPMT.

Diagnostic value of curved multiplanar reformatted images in multislice CT for the detection of resectable pancreatic ductal adenocarcinoma

“…These results are in agreement with those of previous studies using oblique MPR images [26,27]. These findings indicate that the MPR images generated from isotropic or nearly isotropic volumetric data sets provide sufficient resolution in the Z-axis for accurate evaluation of the main pancreatic duct and are more Fig.…”

Evaluation of serial changes of pancreatic branch duct intraductal papillary mucinous neoplasms by follow-up with magnetic resonance imaging

“…The intraductal papillary mucinous neoplasm (IPMN) of the pancreas was first described in the 1980s; its actual classification among cystic lesions of the exocrine pancreas was established in 1996 [ 1 , 2 ] . With the improvement of techniques and modalities of cross sectional imaging studies, the detection of this lesion continues to increase and has become a topic of growing scientific interest [ 3–8 ] .…”

Dynamic computed tomography findings of malignant intraductal papillary mucinous tumor compared with invasive ductal adenocarcinoma

“…Usually, a diagnosis of IPMT is not diffi cult with multislice CT, magnetic resonance imaging (MRI), and magnetic retrograde cholangiopancreatography (MRCP). 17,18 Sometimes, however, it is diffi cult to differentiate IPMT from IDAC with peritumoral retention cysts in the preoperative radiological fi ndings. 5 One of the reasons IPMT resembles IDAC seems to be as follows.…”