Pulsating Laser Grid Control for Uniform Tissue Ablation
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Solution Overview
Problem
Current laser systems struggle to achieve precise and homogeneous ablation over large tissue areas, requiring control over spot location, width, and depth, especially in medical procedures like cosmetic laser treatments.
Innovation Solution
A laser ablation system with a controller that adjusts pulse frequency, grid size, and scanner movement to deliver controlled ablation, using a gain medium, pump, and scanner to create a pulsating laser beam, allowing for customizable coagulation diameter and depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current laser systems use active or passive Q-switchers to create laser pulses, then nanosecond-scale pulses can be produced, but precise and homogeneous ablation over large tissue areas cannot be achieved
Solution Approach 1:
The treatment area is divided into a grid of multiple locations, with each location receiving a sequence of laser pulses. This segmentation allows precise control over each ablation spot while covering large总面积 through systematic scanning across multiple grid points
Solution Approach 2:
The laser system dynamically adjusts the pulse frequency at each location based on the desired coagulation diameter. The controller modifies the pulse frequency in real-time to achieve the desired ablation characteristics, transitioning from static to dynamic control to maintain precision across large treatment areas
2Productivity
If laser pulse frequency is increased to cover large areas, then treatment speed improves, but control over spot location, width, and depth deteriorates
Solution Approach 1:
The controller receives feedback regarding the desired coagulation diameter and adjusts the pulse frequency accordingly. This closed-loop control ensures that even at high treatment speeds, the spot location, width, and depth remain precisely controlled by continuously adapting parameters based on treatment requirements
Solution Approach 2:
The system changes the pulse frequency parameter dynamically based on the desired coagulation diameter and treatment location. By adjusting this key parameter, the system maintains precise spot control while achieving high productivity through optimized pulse delivery across the treatment area
3Manufacturing precision
If multiple pulses are provided to each location to achieve desired ablation depth, then ablation depth control improves, but treatment time increases
Solution Approach 1:
The controller pre-calculates the number of pulses required at each grid location based on the desired ablation depth and coagulation diameter. By determining the optimal pulse sequence in advance, the system achieves precise depth control while minimizing treatment time through efficient pulse delivery without unnecessary delays
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 precise and controlled ablation across large tissue areas, ensuring uniformity and accuracy in medical treatments by adjusting pulse frequency and scanner movement.
Implementation Method 1
a pump configured to optically pump a lasing medium
Implementation Method 2
laser systems are widely used in medical fields, for example, to perform precise surgeries... capability of producing a laser beam with a high energy output focused on a miniscule, precise location... create small ablations spots
Data Source
AI summary
A laser ablation system is disclosed. The laser system comprises a laser cavity; a gain medium; a pump; a scanner; and a controller configured to: receive, a system pulse frequency; receive a desired pulse frequency; calculate, based on the system pulse frequency and the desired pulse frequency, a number of points to be included in a grid wherein each point corresponds to a location of a pulse; receive at least one of: a size of a treatment area, a shape of the treatment area, and the required pulse density; determine the number of grids required for covering the treatment area and locations of the pulses in each grid based on the received size of the treatment area, shape of the treatment area, and the required pulse density; and control the pump and the scanner to provide laser pulse to all locations in each grid.