A High-Frequency Mechanical Scanning Ultrasound Imaging System

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Ultrasound Technology

Background:

• High-frequency ultrasound offers high resolution for clinical applications like cardiovascular, ophthalmology, and skin imaging.
• Developing multi-element transducers and multi-channel systems for high-frequency ultrasound presents significant challenges.

Purpose of the Study:

• To propose and develop a high-frequency ultrasound imaging system based on mechanical scanning.
• To achieve high-resolution, real-time ultrasound imaging suitable for clinical applications.

Main Methods:

• A single-channel high-frequency ultrasound imaging system was developed using a reciprocating feed mechanism for scanning with a 60 MHz transducer.
• The system incorporates transmitting, analog front end, acquisition, and FPGA control modules.
• Image compensation was implemented to address non-uniformity issues arising from mechanical scanning.

Main Results:

• The system achieved an imaging resolution of 51 μm and an imaging depth of 8 mm.
• Real-time imaging speed was demonstrated at 12 frames per second (fps).
• Experiments on wire targets and ex vivo tissues validated the system's performance.

Conclusions:

• The developed high-frequency mechanical scanning ultrasound imaging system offers a simple structure, high frequency, real-time capability, and excellent imaging performance.
• The system effectively meets clinical demands for high-resolution ultrasound imaging.