Week 8 Flashcards
For radiographs what color is air?
black
What do sound waves create?
Moving images
On an ultrasound black indicates what?
Fluid
What is a curved transducer used for?
Big windows
What are linear transducers good for?
Overall images
What are sector transducers used for?
Small windows
How does the transducer work?
Sound waves go into the patient and an echo come back
What will high frequency give you?
Best image but low penetration
What will low frequency give you?
Low quality but good penetration
What is homogenous?
Uniform echos
What is heterogeneous?
Non uniform echo
Define echogenicity
Generating sound waves
Hyperechogenic is..
Bright
Hypoechoic is…
Dark
Anechoic is…
Non echo producing black
Isoechoic is…
Similar echos produced
What are some examples of hyperechoic sound?
Bones, stones, and fat
What are some examples of hypoechoic?
Lymph nodes, GI, and liver masses
What are some examples of isoechoic sound?
Metastatic disease and spleen and liver
What is a doppler ultrasound?
An imaging technique that can detect moving liquids
What does the red color indicate?
Movement towards the transducer
What does the blue color indicate?
Movement away from the transducer
