Miniaturized Forward-Looking OCT Probe Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OCT scanning methods are impractical for visualizing targets through narrow orifices due to non-linear scan patterns, complex mechanisms, and large probe diameters, limiting their ability to characterize plaque in coronary arteries and visualize tissue structures during needle insertion or through endoscope channels.
Innovation Solution
A small-diameter, forward-looking OCT probe design utilizing a push-pull actuation scheme with a single-mode optical fiber and integrated micro-lens or mirror, allowing longitudinal movement within a flexible tube to produce a cross-sectional scan, enabling miniaturization and simplification of the distal probe for forward-directed imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional galvanometer or rotary motor scanning methods are used, then OCT imaging can be achieved, but the probe diameter becomes excessively large and the mechanism becomes complex
Solution Approach 1:
The patent replaces complex mechanical scanning mechanisms (galvanometers, rotary motors) with a push-pull actuation scheme that uses simple linear motion of the optical fiber through the tube to achieve scanning. This substitution of mechanical systems reduces both complexity and size requirements for the probe.
Solution Approach 2:
The patent separates the optical fiber from the tube structure, allowing the fiber to slide independently through the tube. This segmentation enables the optical components to be miniaturized while the tube provides structural support and guidance, resolving the contradiction between small size and functional capability.
2Ease of operation
If forward-directed optical scanning is implemented with conventional methods, then imaging through narrow orifices becomes possible, but non-linear scan patterns and complex mechanisms are generated
Solution Approach 1:
Instead of moving complex scanning mechanisms at the distal end to achieve forward scanning, the patent inverts the approach by keeping the distal end simple and miniaturized, while implementing the scanning function through push-pull actuation of the optical fiber from the proximal end. This inversion eliminates non-linear scan patterns and complex mechanisms.
3Length of moving object
If the distal end of the probe is miniaturized, then insertion through narrow orifices is enabled, but the scanning capability is compromised
Solution Approach 1:
The patent introduces the tube as an intermediary structure that guides and supports the optical fiber while allowing it to slide through. This intermediary enables the distal end to remain miniaturized for insertion through narrow orifices while maintaining full scanning capability through the push-pull actuation mechanism.
Solution Approach 2:
The patent employs a flexible tube structure that allows the optical fiber to move smoothly through while maintaining a compact distal profile. The flexible tube enables miniaturization at the distal end while preserving the scanning function through controlled fiber movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective visualization of tissue structures and plaque characterization in coronary arteries and through endoscope channels with a miniaturized, simplified probe, facilitating image guidance during atherectomy and other clinical procedures.
Implementation Method 1
a single-mode optical fiber with an integrated micro-lens and beam deflector
Implementation Method 2
a single-mode optical fiber with an integrated micro-lens and beam deflector
Implementation Method 3
a single-mode optical fiber with an integrated micro-lens and beam deflector
Implementation Method 4
a push-pull actuation scheme that advantageously overcomes many of the limitations of previous approaches
Data Source
AI summary
In one aspect, the invention relates to an imaging probe. The imaging probe includes an elongate body having a proximal end and distal end, the elongate body adapted to enclose a portion of a slidable optical fiber, the optical fiber having a longitudinal axis; and a first optical assembly attached to a distal end of the fiber. The first optical assembly includes a beam director adapted to direct light emitted from the fiber to a plane at a predetermined angle to the longitudinal axis, a linear actuator disposed at the proximal portion of the elongated body, the actuator adapted to affect relative linear motion between the elongate body and the optical fiber; and a second optical assembly located at the distal portion of the elongate body and attached thereto, the second optical assembly comprising a reflector in optical communication with the first optical assembly, the reflector adapted to direct the light to a position distal to the elongate body.