Flashcards in Pulse-Echo Instrumentation Deck (32):
relating to or using signals or information represented by a continuously variable physical quantity such as spatial position or voltage
In Beam former; converts voltage amplitude to a number; analog to digital suitable for computer memory
Beam former electronically determines
Shape and steer of beam by firing delays
Then sends signals accordingly to transducer
an electronic circuit that has two stable states
A bit (short for binary digit) is the smallest unit of data in a computer
a high-vacuum tube in which cathode rays produce a luminous image on a fluorescent screen, used chiefly in televisions and computer terminals
creating very long sound pulses containing a wide range of frequencies, distributing energy over a broad frequency range
Used to make image uniformly bright from top to bottom
Compression decreases the difference between the largest and the smallest voltages or echo amplitudes
Contrast resolution is the ability to distinguish between differences in intensity in an image
Demodulation is the act of extracting the original information-bearing signal from a modulated carrier wave
Depth Gain Compensation
TGC - Increases amplification at varying depths
In Image Proceimage data ssor; Converts processed digital into analog signals suitable for the TV video display
Ratio of the largest to the smallest amplitude or power that a system can handle is called Dynamic Range
the number of sonographic images stored into memory per second
ratio of amplifier output to input electrical power
Ultrasonography that displays small differences in an acoustical impedance as if they were different shades of gray.
Temporarily stores images during scanning, for viewing and recording
An electronic device that reformats echo data into image form
averaging of sequential frames together to get a smoother image
Picture archiving and communications systems
a minute area of illumination on a display screen, one of many from which an image is composed.
after scan converter memory - ability to change image after it is taken.
before scan converter memory
Storage of image
ultrasound technique used to obtain images of soft tissue as they move in real-time.
Because several images can be presented per second its called a “real time” display
Signal processing is an enabling technology that encompasses the fundamental theory, applications, algorithms, and implementations of processing or transferring information contained in many different physical, symbolic, or abstract formats broadly designated as signals.
averaging of frames that view anatomy from different angles
Temporal resolution (TR) refers to the precision of a measurement with respect to time.