Thermal Imaging During Laser Surgery

Gibson, Brian James (1995) Thermal Imaging During Laser Surgery. PhD thesis, University of Glasgow.

Abstract

This thesis considers the problems of remote temperature measurement, using a pyro-electric vidicon (PEV) to image small areas of biological tissue heated by laser irradiation. This is applied specifically to laser-assisted vascular anastomosis (LAVA), which is a surgical technique that aims to bond apposed tissue edges. It is a technique which has shown potential but the results have not been consistently successful. In order to understand the bond mechanism and to ascertain the optimum bond temperature, a number of authors have measured the temperature at the bond site using remote thermal imagers. However, if the limitations of the imager are not taken into account, then the temperature will be underestimated. These limitations were investigated extensively for the PEV but the principles apply to all thermal imagers. In particular, a minimum source width of 6 mm was required in order to avoid an underestimation of the temperature and considering the laser spot size was approximately 1.5 mm, large errors could be expected depending on the imager employed. In our case, errors of 20

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: D V Land
• Keywords: Medical imaging, Applied physics, Biophysics, Biomedical engineering
• Date of Award: 1995
• Depositing User: Enlighten Team
• Unique ID: glathesis:1995-74897
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 27 Sep 2019 15:27
• Last Modified: 27 Sep 2019 15:27
• URI: https://theses.gla.ac.uk/id/eprint/74897