Inverse scattering for rotationally scanned optical coherence tomography

Area of Science:

• Biomedical Optics
• Medical Imaging
• Inverse Scattering Theory

Background:

• Optical coherence tomography (OCT) uses fiber-optic catheters for luminal structure imaging.
• Current OCT methods have limited resolution due to fixed-focus beams.
• Angular scanning of the beam restricts imaging to scatterers at a specific distance.

Purpose of the Study:

• To develop a novel solution for the inverse scattering problem in OCT.
• To enable quantitatively meaningful image reconstructions.
• To enhance the resolvable volume of the sample in luminal OCT.

Main Methods:

• Utilized an angularly scanned Gaussian beam.
• Focused the beam at a fixed distance from the origin.
• Developed an algorithm to estimate sample susceptibility.

Main Results:

• Achieved quantitatively accurate reconstructions of sample susceptibility.
• Extended the imaging range beyond the fixed focal distance.
• Demonstrated improved resolution and extended sample volume.

Conclusions:

• The presented inverse scattering solution significantly advances OCT capabilities.
• This method offers enhanced imaging for intravascular and gastrointestinal applications.
• The technique provides a more comprehensive view of luminal structures.