Smartphone based hand-held quantitative phase microscope using the transport of intensity equation method

Area of Science:

• Biomedical Optics
• Microscopy
• Mobile Health

Background:

• High-contrast imaging is crucial for medical diagnosis.
• Portable and cost-effective microscopy solutions are needed for remote healthcare applications.

Purpose of the Study:

• To demonstrate a hand-held smartphone-based quantitative phase microscope for mobile healthcare.
• To develop a portable system for accurate, high-contrast imaging using readily available technology.

Main Methods:

• Utilized a transport of intensity equation (TIE) method for phase retrieval.
• Captured multi-focal images using a smartphone camera and manual focusing.
• Developed an Android application to solve the Poisson equation for phase calculation.

Main Results:

• Successfully imaged a random phase plate with known phases.
• Demonstrated performance by imaging biological samples including red blood cells, Pap smears, and plant tissues.
• Achieved accurate, high-contrast phase imaging with the portable system.

Conclusions:

• The smartphone-based quantitative phase microscope is accurate, high-contrast, cost-effective, and field-portable.
• This device shows promise as a tool for remote healthcare and medical diagnosis.
• The developed system facilitates mobile healthcare by enabling advanced imaging in diverse settings.