Phase contrast tomography at lab on chip scale by digital holography.

Area of Science:

• Biomedical Optics
• Cellular Imaging
• Microfluidics

Background:

• High-throughput single-cell analysis is crucial for advanced biomedical applications.
• Label-free tomographic phase microscopy (TPM) offers a promising approach for this challenge.
• Existing TPM methods have limitations in complexity and data acquisition.

Purpose of the Study:

• To review current TPM methods, detailing their advantages and disadvantages.
• To introduce an alternative tomographic technique for live cell analysis.
• To explore future trends and applications of TPM.

Main Methods:

• Review of existing tomographic phase microscopy techniques.
• Development of a novel tomographic method utilizing random cell rolling in microfluidic channels.
• Acquisition of phase-contrast tomography for 3D cell position and orientation retrieval.

Main Results:

• The proposed method simplifies the optical system by eliminating the need for mechanical/optical scanning.
• Complete 3D position and orientation of rotating cells are retrieved without a priori information.
• Accurate characterization of diverse biosamples, including red blood cells and diatoms, is achieved.

Conclusions:

• The novel tomographic technique significantly advances label-free, high-throughput single-cell analysis.
• This simplified approach enhances the practicality and applicability of TPM in biomedical research.
• Future developments in TPM promise further breakthroughs in cellular imaging and diagnostics.