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Sono Transducer 1

Transducers

QuestionAnswer
What is the function of a Transducer? Convert one form of energy to another
What 2 energies are converted to each other? Electrical to Acoustic; Acoustic to Electric
Who Discovered the Piezoelectric Effect? Pierre Curie
What does Piezo stand for? Pressure
What is the first known Piezoelectric Material? Quartz
What is the Piezoelectric Material used today? PZT
Define Curie Point. The temperature at which a Piezoelectric material loses it's Piezoelectric effect when heated to 300 celcius
What are the 3 types of transducers Linear Array; Sector Array; Curved-Linear array
What does a Transducer Consist of? The Element; Damping Material; Housing Material; Casing or Housing
What is another name for Operating Frequency Resonance Frequency
What is the Operating Frequency determined by? Propagation speed of transducer and thickness of transducer
The _______ the element, the higher the frequency. Thinner
The thicker the element, the ______ the frequency. Lower
Does Damping Material improve or worsen Axial resolution? Improve
What 3 things is Damping material known to do? Improve resolution, Reduce sensitivity, Reduce efficiency
Matching Layer stops total reflection at skin boundary. True or False? True
Matching layer only uses 1 matching layer for impedance. True or False False
What happens when an element in a transducer has voltage applied? It Vibrates, causing the electricity to be converted to acoustic energy
What does the PRF Equal The Voltage Repetition Frequency
What part of the transducer is active? The element/transducer
What is the range of frequencies in Ultrasound called? The Bandwidth
The _______ the pulse, the ____ frequencies there are. Shorter, More
The____ number of cycles, the _____ the bandwidth Fewer, Wider
How do you find the Fractional Bandwidth? Bandwidth divided by the Operating Frequency
Multi-hertz transducers are as strong as the same frequency from a Single frequency transducer. True or False? False
What term describes the pureness of a sound beam? Quality Factor
What is the Formula for Q Factor 1 divided by fractional bandwidth OR Operating Frequency divided by the bandwidth
Quality Factor is approximately equal to the number of cycles in the pulse. True or False? True
Increased Bandwidth and High/Low Q factor both improve image quality. Low
Damping Material _______ the Q factor, Damping material _________ the bandwidth. reduces, increases
Name the 4 types of Invasive Transducers. Vaginal, Rectal, Esophagus, Blood Vessel
Created by: A-Hole
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