Reconstruction of the portal vein with 64-slice spiral CT of bile duct obstruction

Abstract

The aim of this study was to evaluate 64-slice spiral CT image reconstruction of the portal vein in biliary obstruction. A total of 34 clinical patients with biliary obstruction were confirmed by 64-slice spiral CT scanning with portal venous phase multi-planar reconstruction (MPR) of the biliary tract, curved planar reconstruction (CPR), thin-slab minimum-intensity projection (TS-MinIP) and maximum intensity projection (MIP). The reconstructed images were reviewed to further assess the position and cause of the biliary obstruction and to judge the accuracy of diagnosis. The 64-slice spiral CT image reconstruction of the biliary obstructions determined the causes with an accuracy of 88.2% (30/34) and identified the location of the obstruction with an accuracy of 100%. A 64-slice spiral CT reconstructed image of the portal bile duct lesions was generated, which indicated the lesion morphology, location and anatomical relationship with surrounding tissues, secondary biliary stricture and the degree of expansion and is of great clinical value in the characterization and preoperative evaluation of biliary disease.

Multiphase multidetector‐row CT reveals different patterns of hepatic portal venous gas and pneumobilia

“…Minimum intensity projection is, by definition, “a data visualization method that enhances the visualization of low‐density structures in a certain given volume.” It allows projecting voxels of the lowest attenuation value generating a single bidimensional image 23 . Although normally used to evaluate airways and lungs, MinIP has been described in both human and veterinary radiology literature as useful tool for analyzing the biliary tree 23,27–30 . Nevertheless, the MinIP technique was described in human literature for the detection of intrahepatic gas only in postmortem CT 31 …”

“…23 Although normally used to evaluate airways and lungs, MinIP has been described in both human and veterinary radiology literature as useful tool for analyzing the biliary tree. 23,[27][28][29][30] Nevertheless, the MinIP technique was described in human literature for the detection of intrahepatic gas only in postmortem CT. 31 Differentiating between HPVG and PB is important because of their different clinical significance, and because they recognize different causes (leading to different treatments). As already described both in human and veterinary medicine, 3,4,19 PB was commonly associated with biliary surgery (cholecystoduodenostomy), and the presence of gas in the biliary tree is secondary to a connection between the gastrointestinal tract and the biliary tree.…”

Comparative Analysis Image Results of Pancreas in Portal Vein Phase on Ct Scan Abdomen Contrast Without and With Minimum Intensity Projection in Ct Scan 64 Slice

“…Namun skor yang diperoleh dari penilaian duktus pankreas memiliki skor terendah dibandingkan dengan lainnya. Hal itu oleh karena menurut penelitian yang dilakukan oleh (Kim et al, 2004) pada penampang axial obliq akan memperlihatkan duktus pankreatikus dengan sangat baik dan (Xia et al, 2013) pada jurnalnya mengatakan bahwa MinIP tidak memberikan informasi yang lebih dibandingkan dengan gambar MPR, namun jika reformat MinIP digunakan pada penampang tiga dimensi maka akan memperlihatkan citra pankreas dengan optimal. Sedangkan pada penelitian ini, data yang digunakan yaitu penampang axial pada bidang dua dimensi sehingga duktus pankreas tidak bisa terlihat seutuhnya dan anatomi dari pankreas pada masing-masing individu memiliki variasi yang berbeda sehingga peneliti mengalami kesulitan untuk memperlihatkan duktus pankreas seutuhnya.…”