Ultrasound Physics Ch 10-12

What is axial resolution?

• The ability to visualize two objects that are front to back (one is more shallow and one is deeper).

• The ability to display two structures that are very close together when the structures are perpendicular to the main axis of the sound beam.

• The ability to visualize two objects that are side by side.

• The ability to display two structures that are very far apart.

What does axial resolution allow in terms of structure display?

• Display two structures that are very close together when the structures are parallel to the main axis of the sound beam.

• Display two structures that are very far apart when the structures are parallel to the main axis of the sound beam.

• Display two structures that are very close together when the structures are perpendicular to the main axis of the sound beam.

• Display two structures that are very far apart when the structures are perpendicular to the main axis of the sound beam.

Which of the following is associated with superior axial resolution?

• Longer spatial pulse length

• Shorter spatial pulse length

• Longer pulse duration

• More cycles per pulse

What is the relationship between axial resolution and spatial pulse length?

• Axial Resolution (mm) = Spatial Pulse Length (mm) × 2

• Axial Resolution (mm) = Spatial Pulse Length (mm) + 2

• Axial Resolution (mm) = Spatial Pulse Length (mm) / 2

• Axial Resolution (mm) = Spatial Pulse Length (mm) - 2

Which factor contributes to higher frequencies in axial resolution?

• Longer wavelength

• Shorter wavelength

• More cycles per pulse

• Lower frequencies

What effect do fewer cycles per pulse have on axial resolution?

• More ringing

• Less ringing

• No effect

• Increased numerical values

What is another name for axial resolution?

• LARRD

• LARD

• LARRT

• LARDD

What is the ability to visualize two structures that are side by side and still identify them without merging called?

• Axial Resolution

• Lateral Resolution

• Depth Resolution

• Temporal Resolution

What is another name for lateral resolution?

• LATA

• LATB

• LATC

• LATD

What affects lateral resolution in imaging?

• Beam diameter

• Frequency of sound

• Temperature

• Color of the beam