Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Sono Transducer 1
Transducers
| Question | Answer |
|---|---|
| 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
Popular Physics sets