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
Chapter 1 and 2 Phys
| Question | Answer |
|---|---|
| which ultrasound technique creates anatomical images ? | sonography |
| which ultrasound technique evaluates blood flow? | doppler ultrasound |
| what is the normal audible range of human hearing? | 20Hz to 20,000 Hz |
| a sound greater than 20,000 HZ | ultrasound |
| a sound less than 20 Hz is called | infrasound |
| ultrasound imaging uses what technique | pulse-echo |
| what determines the depth of the image ? | time it takes the echi to return |
| one transmitted pulse creates one | scan line |
| True or false ( one pulse creates only one echo | false |
| which transducer produces a rectangular image | linear array |
| parallel scan lines indicates what transducer? | linear array |
| which transducer produces a pie shaped image | phased array |
| a common starting point indicates what transducer? | phased array |
| Linear transducer advantage | high frequency and high resolution |
| Linear transducer disadvantage | low penetration |
| Linear frequency | 7-12 mhz |
| phase array advantage | high penetration |
| phase array disadvantage | low resolution |
| phase array frequency | 2-4 mhz |
| curved convex transducer advantage | high penetration |
| curved convex transducer disavantage | low resolution |
| curved convex transducer frequency | 4-7 mhz |
| which transducer produces a curved-top image? | convex array |
| which transducer produces a flat top modified sector image? | vector array |
| which transducer produces a circular image? | annular array |
| the "B" in B-Mode stands for ? | brightness |
| which doppler displays a waveform? | spectral doppler |
| which doppler displays blood flow using color? | color doppler |
| which doppler is quantitative | spectral doppler |
| sound waves are what two types of waves | mechanical and longitudinal |
| which type of wave requires a medium | mechanical |
| how do particles move in longitudinal wave? | back and forth |
| what are the things that change as sound travels | acoustic variable |
| name the acoustic variables | density, pressure, particle vibration, temperature |
| Using echoes of ultrasound to create anatomic images is called | sonography |
| The audible range for sound frequency is | 20 Hz to 20,000 |
| Anything higher than 20Hz this is called | ultrasound |
| anything lower than 20,000 Hz is called | infrasound |
| to create images, the ultrasound must be _______, not continuous | pulsed |
| the string of echo information sent back from each single pulse | scan line |
| When these scan lines are all parallel, the resulting image is called _______. Which type of transducer produces such images? | rectangle,linear |
| When these lines all radiate out from a single starting point, the resulting image is called _____ _____. Which type of transducer produces such images? | sector image, phased array |
| A sector image with a curved top is produced by which type of transducer? | convex |
| A sector image with a flat top is produced by which type of transducer? | vector array |
| What type of transducer produces a “ring”-like image that goes around in a complete circle? | annular array |
| Which type of ultrasound process is used to detect direction and velocities of blood flow in the body? | doppler |
| what is a doppler ultrasound | detection and evaluation of blood flow and tissue motion |
| speed formula | c=f x Lambda |
Created by:
lupita25