title: Multidetector computed tomography (MDCT) manifestations of the normal duodenal papilla.
abstract: OBJECTIVE
  This study aimed to investigate Multidetector Computed Tomography (MDCT) manifestations of the normal duodenal papilla, thereby improving the knowledge on the CT manifestations of the normal anatomy of the duodenal papilla.
  
  
  METHODS
  A retrospective study was conducted by reviewing the CT results of 70 normal duodenal papilla cases examined by 64-MDCT. The analysis particularly focused on the position, size, morphology, and enhancement pattern of the duodenal papilla, as well as the ampulla of Vater.
  
  
  RESULTS
  In axial images, the average base diameter of the duodenal papilla was (7.3 ± 1.4)mm, whereas the average height was (6.5 ± 1.8)mm. Majority of the duodenal papilla (52.9%, 37/70) showed a round shape. In most cases (97.1%, 68/70), the duodenal papilla were located at the middle and lower third of the descending duodenum. In 84.3% of the cases (59/70), the arterial phase enhanced CT scan images were optimal for the visualization of the papilla. The "target sign" could be clearly identified from arterial phase images in 71.4% (50/70) of the cases. In 72.9% (51/70) of the cases, the ampulla of Vater had a common channel (Y type).
  
  
  CONCLUSIONS
  64-MDCT can clearly visualize the normal anatomy of the duodenal papilla and surrounding structures, thereby providing valuable information for the diagnosis and treatment of diseases in this region.
authors: Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China. canhuisun@sina.com
authors: Can-Hui
authors: CH
authors: Sun
authors: Xuehua
authors: X
authors: Li
authors: Tao
authors: T
authors: Chan
authors: Zhenpeng
authors: Z
authors: Peng
authors: Zhi
authors: Z
authors: Dong
authors: Yanji
authors: Y
authors: Luo
authors: Zi-Ping
authors: ZP
authors: Li
authors: Shi-Ting
authors: ST
authors: Feng
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D001652:Bile Ducts / Q000502:physiology*; D002758:Cholangiography / Q000379:methods; D004386:Duodenum / Q000502:physiology* / Q000528:radiation effects*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging* / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012737:Sex Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*