Adaptive Pixel Size Rasterization in Laser Scanning Microscopy

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Solution Overview

Problem

Existing methods of generating rasterized images in laser scanning microscopy face challenges in achieving optimal spatial resolution and minimizing noise, as the pixel size is often predetermined and not adaptable to the actual distribution of effective local excitation positions within the sample, leading to blurred structures and loss of contrast.

Innovation Solution

A method and apparatus that dynamically set the pixel size of rasterized images based on the evaluation of effective local excitation positions for emitted photons, optimizing the pixel size to enhance visualization of sample structures while minimizing noise, by iteratively processing and adjusting the pixel size according to the distribution of these positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the pixel size is reduced to improve spatial resolution, then the spatial resolution is improved, but the image noise increases significantly

Engineering Contradiction:
Improvespatial resolutionVSAvoidimage noise
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by making the pixel size adaptive rather than fixed. The pixel size is dynamically adjusted based on the local density of effective excitation positions in different regions of the sample. In regions with high photon density, smaller pixels are used to capture fine details, while in regions with low photon density, larger pixels are used to accumulate sufficient photons and reduce noise. This dynamic adaptation resolves the contradiction between spatial resolution and noise by optimizing pixel size locally rather than globally.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements local quality by allowing different pixel sizes in different regions of the image based on local characteristics. The pixel size is determined by the local distribution of effective excitation positions, meaning each region of the sample is imaged with an optimal pixel size suited to its specific photon density and structural complexity. This local optimization enables high spatial resolution in photon-rich regions while maintaining acceptable noise levels in photon-poor regions.

Inventive Principle:
Principle #3Local quality

2Object-affected harmful factors

If the pixel size is increased to reduce noise, then the image noise is reduced, but the spatial resolution deteriorates

Engineering Contradiction:
Improveimage noiseVSAvoidspatial resolution
Core Design Contradiction:
Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The patent resolves this contradiction through dynamic pixel size adjustment. Instead of using a uniformly large pixel size that would reduce noise but sacrifice resolution, the system dynamically selects pixel sizes based on local photon density. In regions where sufficient photons are detected, smaller pixels maintain high resolution without excessive noise. In regions with limited photons, larger pixels are used to accumulate enough signal, accepting some resolution loss to avoid noise-dominated images.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies local quality by tailoring the pixel size to the local imaging conditions. Each region of the sample is assigned a pixel size appropriate to its local photon density and structural features. This localized optimization ensures that noise reduction is achieved where necessary without unnecessarily sacrificing resolution in regions where photons are abundant and higher resolution is achievable.

Inventive Principle:
Principle #3Local quality

3Device complexity

If a fixed pixel size is used for the entire image, then the device complexity is reduced, but the adaptability to different sample regions deteriorates

Engineering Contradiction:
Improvepixel size configurationVSAvoidadaptability to sample structures
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamics by transitioning from a static, fixed pixel size configuration to a dynamic, adaptive one. The pixel size is automatically determined based on the distribution of effective excitation positions detected during scanning. This dynamic approach increases adaptability to different sample regions and structures without requiring manual intervention or complex pre-programming, as the system self-adjusts based on actual imaging conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies self-service by enabling the imaging system to automatically determine optimal pixel sizes based on the detected photon distribution. The system evaluates the local density of effective excitation positions and autonomously selects appropriate pixel sizes for different regions, eliminating the need for external manual configuration or complex preset parameters. This self-adjusting capability enhances adaptability while keeping the operational complexity low for the user.

Inventive Principle:
Principle #25Self-service

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

This approach allows for the generation of rasterized images with improved spatial resolution and reduced noise, effectively capturing detailed information from the sample without artifacts, by adaptively setting the pixel size to match the distribution of effective local excitation positions, thereby enhancing image quality.

Implementation Method 1

locally exciting the sample for emitting photons

Methodology Applied
Scientific EffectFluorescence: Fluorescence

Implementation Method 2

a position of an effective local excitation of the sample for emitting the particular detected photon has been recorded

Methodology Applied
Scientific EffectFocusing: Focusing

Data Source

PatentUS10795140B2Method, device and laser scanning microscope for generating rasterized images
Publication Date: 2020.10.06 ABBERIOR INSTR GMBH
  • US10795140B2 patent drawing
  • US10795140B2 patent drawing
  • US10795140B2 patent drawing

AI summary

In order to generate rasterized images of a sample, a pixel size of image points of a rasterized image is set and photons emitted out of the sample which were detected, and for each of which a position of an effective local excitation of the sample for emitting the respective detected photon has been recorded are assigned to that image point of the rasterized image into which the position of the effective local excitation recorded for the respective detected photon falls. To set the pixel size of the image points to an optimized pixel size, the positions of the effective local excitation of the sample for emitting the detected photons are evaluated.