A 100 MHz B-scan ultrasound backscatter microscope

Area of Science:

• Biomedical Engineering
• Microscopy
• Ultrasound Technology

Background:

• B-mode ultrasound is a powerful imaging technique.
• Microscopy allows for the visualization of fine structures.
• Current limitations exist in imaging internal structures of living specimens at microscopic scales.

Purpose of the Study:

• To describe the construction and operation of a 100 MHz B-mode ultrasound backscatter microscope.
• To extend B-mode ultrasound capabilities into microscopy for imaging living specimens.
• To achieve high resolution and rapid frame rates for microscopic ultrasound imaging.

Main Methods:

• Development of a 100 MHz B-mode ultrasound backscatter microscope.
• Utilizing an f/2 transducer for enhanced resolution.
• Implementing a specialized scanner with a detailed motion system and scan converter.
• Achieving a frame rate of 5 frames per second.

Main Results:

• The constructed microscope provides B-mode imaging at the microscopic level.
• A resolution of approximately 36 microns in both lateral and axial directions was achieved.
• Preliminary images of multicellular spheroids and intact human ocular tissue demonstrate the system's capabilities.

Conclusions:

• The 100 MHz B-mode ultrasound backscatter microscope successfully images internal structures in living specimens at microscopic scales.
• The high resolution and rapid frame rate offer significant advantages for microscopic ultrasound applications.
• This technology holds promise for detailed analysis of biological tissues.