SIM Microscopy Diffraction Order Suppression
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Solution Overview
Problem
Structured Illumination Microscopy (SIM) techniques require a large number of raw images for high-resolution image reconstruction, which limits recording rate and increases photodamage to biological samples due to the need for multiple exposures.
Innovation Solution
The method suppresses the highest orders of diffraction during image reconstruction, reducing the number of raw images required by filtering or using iterative methods, thereby dispensing with the contribution of high-frequency components that have minimal intensity and impact on image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all available orders of diffraction are used for image reconstruction, then image quality is improved, but the number of raw images required increases
Solution Approach 1:
The patent extracts and removes the highest orders of diffraction (specifically the t highest orders) from the image reconstruction process. By filtering out these high-frequency components that have minimal intensity and impact on image quality, the method reduces the number of raw images required from p to n = p - t, directly resolving the contradiction between image quality and quantity of raw images needed
Solution Approach 2:
The patent changes the parameter of diffraction order inclusion by suppressing the t highest orders of diffraction during reconstruction. This parameter modification allows the system to achieve acceptable image quality with fewer raw images, as the suppressed high-frequency components contribute minimally to the final image quality while significantly reducing the required number of exposures
2Measurement precision
If multiple raw images are recorded for high-resolution reconstruction, then resolution is improved, but photodamage to biological samples increases
Solution Approach 1:
By extracting and removing the highest orders of diffraction from the reconstruction process, the patent reduces the total number of raw images required. This directly decreases the number of exposures needed to achieve high-resolution images, thereby reducing cumulative photodamage to biological samples while maintaining acceptable resolution through the use of lower diffraction orders
3Measurement precision
If multiple raw images are recorded for high-resolution reconstruction, then image quality is improved, but recording rate decreases
Solution Approach 1:
The patent extracts and eliminates the t highest orders of diffraction from the reconstruction process, reducing the required number of raw images from p to n = p - t. This reduction directly increases the recording rate by decreasing the time needed to acquire sufficient images for high-resolution reconstruction, while maintaining image quality through the use of the remaining lower diffraction orders
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 a significant reduction in the number of raw images needed, maintaining image quality while reducing photodamage and increasing the efficiency of the microscopy process.
Implementation Method 1
The SIM illumination pattern is often generated from an initial beam by way of a grating which diffracts the initial beam into a plurality of orders of diffraction
Implementation Method 2
The SIM illumination pattern is often generated from an initial beam by way of a grating which diffracts the initial beam into a plurality of orders of diffraction, which as partial beams capable of interfering with one another are arranged in an illumination pupil
Data Source
AI summary
A method for performing SIM microscopy on a sample, includes: generating n raw images of the sample, in each case by illuminating the sample using the same SIM illumination pattern albeit with an individual positioning for each raw image, wherein p orders of diffraction are assigned to the SIM illumination pattern, and generating an image of the sample from the n raw images. An image reconstruction is carried out using the orders of diffraction, wherein t highest orders of diffraction are suppressed during the image reconstruction and n=p−t applies.