Paper Info
Title
A coaxial laser endoscope with arbitrary spots in endoscopic view for fetal surgery.
Abstract
In this paper, we describe a rigid endoscope that transmits a laser beam coaxially to arbitrary points in the endoscopic view, mainly for treatment of twin-to-twin transfusion syndrome. The endoscope consists of a hotmirror for coaxial transmission of visible light and a Nd:YAG laser beam, and galvanometers for controlling the beam irradiation angle. We evaluated the transmission efficiency of the laser power, the spot size through the endoscope and accuracy in positioning the beam. The maximum laser transmission efficiency was 39% and the spot diameter was 2.2-3.2 mm at a distance of 10-20 mm. The positioning accuracy was mostly within 1.0 mm in the endoscopic view at the distance. The average laser power density on the spot was estimated to be 170-370 W/cm2, and a chicken liver was successfully coagulated by changing the laser beam irradiation angle.
Year
DOI
Venue
2009
10.1007/978-3-642-04268-3_11
MICCAI
Keywords
Field
DocType
coaxial laser endoscope,laser power,laser beam irradiation angle,maximum laser transmission efficiency,fetal surgery,yag laser beam,endoscopic view,coaxial transmission,rigid endoscope,average laser power density,beam irradiation angle,laser beam coaxially,arbitrary spots,power density,visible light
Galvanometer,Computer science,Artificial intelligence,Laser power scaling,Surgery,Endoscope,Computer vision,Coaxial,Optics,Laser,Beam (structure),Beam parameter product,Laser beam quality
Conference
Volume
Issue
ISSN
12
Pt 1
0302-9743
Citations 
PageRank 
References 
1
0.39
3
Authors
6
Name
Order
Citations
PageRank
Noriaki Yamanaka141.62
Hiromasa Yamashita2418.93
Ken Masamune325348.57
Hongen Liao439070.91
Toshio Chiba54010.00
Takeyoshi Dohi649697.71