Inverse scattering for rotationally scanned optical coherence tomography.
Optical coherence tomography of luminal structures, such as for intravascular or gastrointestinal imaging, is performed by using a fiber-optic catheter as a beam-delivery probe. The interrogating beam is scanned angularly by rotating the fiber around a fixed central axis. Because the beam is focused only at a fixed distance from the center of the fiber, only scatterers near this distance are resolved. We present a solution of the inverse scattering problem that provides an estimate of the susceptibility of the sample for an angularly scanned Gaussian beam focused at a fixed distance from the origin. This solution provides quantitatively meaningful reconstructions while also extending the volume of the sample that is resolvable by the instrument.
Marks
Daniel L
DL
Beckman Institute of Advanced Science and Technology, Urbana, Illinois 61801, USA.
Ralston
Tyler S
TS
Carney
P Scott
PS
Boppart
Stephen A
SA
D000465:Algorithms; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008027:Light; D008954:Models, Biological; D012399:Rotation; D012542:Scattering, Radiation; D041623:Tomography, Optical Coherence / Q000379:methods*