Laparoscopy And Imaging Techniques PDF Download

Background. Minimally invasive operations have transformed the field of surgery. Major operations are now performed through a series of 1cm incisions rather than through a large opening resulting in less pain, disability and fewer complications. Visualization of intra-abdominal structures is accomplished by endoscopes, 9mm diameter tubes containing relay optics. Application of advanced imaging techniques should enhance the surgeon's ability to perform operations more safely. Methods. Hyperspectral imaging has been adapted to endoscopic surgical instruments via a near infrared liquid crystal tunable filter and a back-illuminated, deep-depletion focal plane array with anti-etaloning process for extending sensitivity in the near infrared region. For the visible laparoscopic hyperspectral imaging, a visible low resolution liquid crystal tunable filter is used with a charged coupled device. Results. This imaging system has been used to visualize the peritoneal cavity in anesthetized pigs. Different inherent chromophores like Oxyhemoglobin, Deoxyhemoglobin, lipids and water, differentiate the intra-abdominal structures. Conclusion. Laparoscopic hyperspectral imaging has great potential for improving the surgeon's ability to "see through" the porta hepatis and visualize the common bile duct during cholecystectomy without infusing contrast agents or radiographs. (Abstract shortened by UMI.).