Image Resolution practice quiz

Question 1

Axial resolution is the:

Ability to accurately image moving structures

Minimum reflector spacing along the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Minimum reflector spacing perpendicular to the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Smallest variation in echo level that can be distinguished as a shade of grey on B-mode

Answer 1

Minimum reflector spacing along the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Question 2

Lateral resolution is the:

Smallest variation in echo level that can be distinguished as a shade of grey on B-mode

Minimum reflector spacing along the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Minimum reflector spacing perpendicular to the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Ability to accurately image moving structures

Answer 2

Minimum reflector spacing perpendicular to the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Question 3

Contrast resolution is the:

Minimum reflector spacing perpendicular to the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Minimum reflector spacing along the axis of an ultrasound beam that results in separate distinguishable echos being displayed

The smallest variation in echo level that can be distinguished as a shade of grey on B-mode

The ability to accurately image moving structures

Answer 3

The smallest variation in echo level that can be distinguished as a shade of grey on B-mode

Question 4

Temporal resolution is the:

Smallest variation in echo level that can be distinguished as a shade of grey on B-mode

Minimum reflector spacing perpendicular to the axis of an ultrasound beam that results in separate distinguishable echos being displayed

Ability to accurately image moving structures

Minimum reflector spacing along the axis of an ultrasound beam that results in separate distinguishable echos being display

Answer 4

Ability to accurately image moving structures

Question 5

In order for two reflectors to be displayed as two separate reflectors in the axial plane what must be true?

They must be separated by spatial pulse length

They must be separated by less than one spatial pulse length

They must be separated by one wave length

They must be separated by less than one wave length

Answer 5

They must be separated by spatial pulse length

Question 6

Where is the best lateral resolution on the sound beam?

Focal-point

Near-field

Far-field

Center of the beam

Answer 6

Focal-point

Question 7

Frame rate depends on all of the following EXCEPT:

Propagation speed

Number of scan lines

Depth of reflector

Wavelength

Question 8

The increased the frame rate of an image you must:

Decrease the depth

Increased the depth

Decreased the sector width

Increased the sector width

Answer 8

Decrease the depth

Decreased the sector width