Display Modes

Question 1

What are the 3 ways to display ultrasound image data?

Answer 1

1. A mode (amplitude)
2. B mode (brightness)
3. M mode (motion)

Question 2

What is A-mode?

Answer 2

It is the amplitue of each reflector’s echo. It is placed on a graph across th depths of reflectors.

• The Y axis: ampitide (strength of signal)
• The X axis: depth of reflector.

Question 3

What us A mode used primarily for?

Answer 3

It is usually used for opthamology to accurately determine the depth of structures in the eye.

Question 4

What is B mode?

Answer 4

It is the bright or darker gray dots that display the strength of each echo along a vertical line representing the course of a soundwave.

Question 5

Describe the x,y,z axis on this picture.

Answer 5

• Y axis: the depth of the reflector (origin of the echo)
• X axis: each point on the transducer that sent a soundwave.
• Z axis: the brightness of the dot, representing the strength of the echo.

Question 6

What is M mode?

Answer 6

Motion is displayed with wavy horizontal lines. A wavy horizontal line represents a reflector that is moving.

Question 7

What is M mode used for?

Answer 7

M mode is used to assess the motion of the heart.