Signal Processing in High-Frequency Broadband Imaging Systems for Dermatologic Application

A high-resolution ultrasonic imaging system working in pulse-echo mode has been realized for application in dermatology. For data acquisition a spherically focused polymer transducer is mechanically moved. Center frequency of the system is approximately 40 MHz, bandwidth (-6 dB) is about 50 MHz. Resulting axial resolution capability is 24 μm, the obtained lateral resolution characteristics is better than 90 μm.

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