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
Famous quotes containing the words typical, receive and/or chain:
“A building is akin to dogma; it is insolent, like dogma. Whether or no it is permanent, it claims permanence, like a dogma. People ask why we have no typical architecture of the modern world, like impressionism in painting. Surely it is obviously because we have not enough dogmas; we cannot bear to see anything in the sky that is solid and enduring, anything in the sky that does not change like the clouds of the sky.”
—Gilbert Keith Chesterton (1874–1936)
“The town’s poor seem to me often to live the most independent lives of any. Maybe they are simply great enough to receive without misgiving.”
—Henry David Thoreau (1817–1862)
“We are all bound to the throne of the Supreme Being by a flexible chain which restrains without enslaving us. The most wonderful aspect of the universal scheme of things is the action of free beings under divine guidance.”
—Joseph De Maistre (1753–1821)