| Theme |
Advances in Diagnosis and Endoscopic Treatment for Pancreatic and Biliary Lesion |
| Title |
Diagnostic Imaging of Pancreatic and Biliary Diseases Using Ultrasonography (US) and Contrast Enhanced Ultrasonography (CEUS) |
| Author |
Tatsuya Nagakawa |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Kosei Hatakeyama |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Toshihiro Suga |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Hiroyuki Miyakawa |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Atsushi Hirayama |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Takahiro Matsunaga |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| Author |
Keiya Okamura |
Division of Pancreato-Biliary Section, Department of Gastroenterology, JA Sapporo Kohsei Hospital |
| [ Summary ] |
Extracorporeal ultrasound examination has played an important role in screening for pancreatic and biliary disorders. In recent years image resolution has improved greatly, providing important information concerning differential diagnosis.
Tissue harmonic imaging has been developed in conjunction with ultrasonic contrast media. High resolution picture with little artifact and low noise levels can now help provide morphological diagnosis. Appproachs for observing blood flow with gray-scale imaging and without color Doppler functions are inferior to the spatial resolution produced by sonographic hemodynamic diagnosis, employing intraarterial infusion of carbon dioxide microbubbles (C02 US angiography). This has led to the evolution of contrast harmonic imaging, which produces images through the harmonics produced according to the nonlinear backscatter phenomenon derived from the oscillated microbubbles (ultrasonic contrast media). These ultrasonic techniques and their usefulness in diagnosis of pancreatic and biliary disorders are described. |