Pseudocyst in the Pancreatic Tail Associated with Chronic Pancreatitis Successfully Treated by Transpapillary Cyst Drainage

We report a 50-year-old male with pseudocysts in the pancreatic tail associated with chronic pancreatitis successfully treated by transpapillary cyst drainage. He had previously undergone ultrasonography-guided percutaneous cyst drainage for a pancreatic pseudocyst in our hospital. He was readmitted due to abdominal pain and fever. Computed tomography showed recurrence of a pseudocyst in the pancreatic tail measuring 5 cm in diameter. Since conservative treatment failed, endoscopic retrograde pancreatography was performed. There was communication between the pseudocyst and the main pancreatic duct, and pancreatic duct stenosis proximal to the pseudocyst. First, transpapillary pancreatic duct drainage was performed using a plastic stent, but the pseudocyst did not decrease in size and became infected. After removal of the stent, a pigtail type nasocystic catheter was placed in the pseudocyst via the pancreatic duct. The pseudocyst infection immediately disappeared, and the pseudocyst gradually decreased and disappeared. After removal of the nasocystic catheter, no recurrence was observed. As transpapillary drainage of pancreatic pseudocyst, cyst drainage and pancreatic duct drainage have been reported. In our patient with pseudocyst in the pancreatic tail, duct drainage was ineffective and the pseudocyst was infected, whereas cyst drainage was very effective. We considered that cyst drainage by a nasocystic catheter was the first-line therapy as the transpapillary drainage of the pancreatic pseudocyst

Input and Display of Hand Drawn Pattern Onto Planar Board of Arbitrary Position and Pose Utilizing a Projector and Two Cameras

Abstract. In this paper, we propose a system for inputting hand drawn pattern and displaying it on a hand-held planar rectangle board by utilizing two cameras and a projector which are installed above the user. In this system, the cameras and the projector are related by projective geometry. The cameras capture the user’s hand-drawing motion. From the captured images, the tip of the user’s pen and the corners of the board are tracked for detecting the status of pen’s up/down and displaying the drawn pattern at a fixed position on the surface of the board. For demonstrating the validity of the proposed system, we show that the user can draw pattern on the board with arbitrary pose and position, while the pattern is simultaneously displayed on the board in real-time.