Typical B-mode Receive Processing Chain
A typical digital ultrasound processing chain for B-Mode imaging may look as follows:
- Multiple analog signals are acquired data from the ultrasound transducer (the transmitter/receiver applied to the patient)
- Analog signals may pass through one or more analog notch filters and a variable-gain amplifier (VCA)
- Multiple analog-to-digital converters convert the analog radio frequency (RF) signal to a digital RF signal sampled at a predetermined rate (typical ranges are from 20MHz to 160MHz) and at a predetermined number of bits (typical ranges are from 10 bits to 16 bits)
- Beamforming is applied to individual RF signals by applying time delays and summations as a function of time and transformed into a single RF signal
- The RF signal is run through one or more digital FIR or IIR filters to extract the most interesting parts of the signal given the clinical operation
- The filtered RF signal runs through an envelope detector and is log compressed into a grayscale format
Multiple signals processed in this way are lined up together and interpolated and rasterized into readable image.
Read more about this topic: Ultrasound Research Interface
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