Development of a 64 channel ultrasonic high frequency linear array imaging system.

Area of Science:

• Medical Imaging
• Ultrasound Technology
• High-Frequency Arrays

Background:

• Previous ultrasound systems had limitations in lateral resolution and field of view.
• Development of high-frequency ultrasound arrays necessitates advanced digital imaging systems.

Purpose of the Study:

• To design and test a 64-channel digital ultrasound imaging system.
• To serve as a platform for evaluating novel high-frequency linear arrays.
• To improve lateral resolution and extend the field of view in ultrasound imaging.

Main Methods:

• A 64-channel digital imaging system with analog front-end, Time-Gain Compensation (TGC), high-speed digitizers, and a beamformer was implemented.
• A Personal Computer (PC) served as the user interface for real-time image display.
• The system utilized Field Programmable Gate Arrays (FPGAs) for data processing and a beamformer with combined coarse and fine delays.

Main Results:

• The system achieved a maximum frame rate of 50 frames per second.
• Wire phantom images demonstrated a lateral resolution of 146 micrometers and an axial resolution of 54 micrometers.
• The system successfully acquired images of biological samples, including eyeballs and mouse embryos.

Conclusions:

• The developed 64-channel system effectively supports the testing of high-frequency ultrasound arrays.
• The system demonstrates significant improvements in spatial resolution for high-frequency ultrasound imaging.
• This platform facilitates advancements in high-frequency ultrasound array development and application.