1
Define amplitude
strength or height
In A Mode how does the “spike“ correlate to the “dot” in B Mode
the taller the spike, the brighter the dot
ultrasound is frequencies above…
20,000 Hz
1 peak + 1 valley =
1 cycle
Define homogenous
uniform
Define attenuation
reduction in amplitude
Give 2/3 describing words for “increased echo pattern”
1. Echogenic
2. Hyperechoic
3. Increased echogenicity
Give 2/3 describing words for “no echos”
1. Anechoic
2. Cystic
3. Echo free
Define esechoic
equal
Define complex mass
both cystic and solid components in varying degrees
Explain A Mode
-seen as a wave form
Image orientation is dependent on what three things?
1. Patient
2. Position
3. Scan plan
Give 3/5 describing words for “decreased echo patterns”
1. Hypoechoic
2. Echopenic
3. Sonolucent
4. Echolucent
5. Decreased echogenicity
Give the 3 requirements for a mass to be considered to be a cyst
1. No internal Echos
2. good thru transmission (posterior enhancement)
3. Well defined borders/smooth walls
Name the three parts that make up a solid mass
1. Internal echos (homogenous/nonhomogenous)
2. No thru transmission
3. Usually irregular borders
Explain static B Mode
Multiple dots (attained from correlating spikes) can be combined to form a 2D scan
Sagital/longitudinal image orientation gives information on what planes?
superior and inferior
Transverse image orientation gives information on what planes?
medial and lateral
Define “good thru transmission (posterior enhancement)”
when there are increased echos deep to a fluid-filled structure
What 4 things do you evaluate when looking at an ultrasound image?
1. Size
2. Shape
3. Echogenicity
4. Position
list the pros and cons of power doppler
con: cannot distinguish blood flow direction
C Mode
what is it better known as, what does it measure
doppler, measures blood flow
What is M Mode?
what does it stand for, what does it display, what specialty is it primarily used in?
motion mode
graphical display of motion
cardiac
Draw the sagital/longitudinal image orientation
Should include superior, inferior, anterior, and posterior
Explain Real Time B Mode
Live images obtained from b modes put together (current)