Ultrasound Stuff

Question 1

BART

Answer 1

Blue colors move away from probe

Red colors move towards the probe

Question 2

POCUS (Point of Care Ultrasound) vs formal ultra sound

Answer 2

Immediate and increased hands on time w/ patient

Stay within your department and not have to leave

Decrease radiation exposure for patient

Question 3

Linear Ultrasound array

Answer 3

High frequency array used for superficial structures

-high resolution, swallow penetration

Question 4

Phased ultrasound array

Answer 4

Low frequency array that is used for deep structures

-low resolution, deeper penetration

Question 5

Curvilinear ultrasound array

Answer 5

Same as phased array but used primarily for abdominal imaging

Question 6

Rocking

Answer 6

Move the probe back and forth along its long axis while it is stationary

Question 7

Fanning

Answer 7

Move the probe along its short axis while keeping the probe stationary

Question 8

Sliding

Answer 8

Keeps probe perpendicular to structure and slide it around the structure

Question 9

Types of artifacts in ultra sound

Answer 9

Mirror image: objects filled with air can appear isoecoeic to solid structures

Reflection: (acoustic shadowing): reflection of sound waves off solid foreign bodies cause hypoechoic areas to form.

Reverb: vibrating sound waves at an odd angle can cause the appearance that foreign bodies are present even though they aren’t

Refraction: refraction of light from the probe causes false anechoic foreign bodies to form on US

Gas Scatter: gas prescience causes skewed imaging and looks like nothing

Question 10

Gain

Answer 10

Measure strength of US signal. Adjusts brightness of the US

Question 11

Depth

Answer 11

Changes displayed field

Increasing = reduces image resolution and zooms in

Decreasing = Increases image resolution and zooms out