Class 5 Study

What are the ultrasound imaging resolutions? Choose all that apply.

• Detail (axial, lateral, elevational/z-axis)

• Contrast

• Temporal

• Curvelinear

The contrast and temporal resolution are determined by the ______.

• magnetic field
• Instrument

• room temperature
• contrast

The detail resolution is mostly determined by the ______.

• Transducer

• Sound Beam

• Frequency

• Wavelength

What are the 3 types of detail resolution?

• Axial

• Lateral

• Elevational (z-axis)

• Longitudinal

T/F: Ultrasound transducers often have better axial than lateral resolution.

• True

• False

T/F: Ultrasound transducers often have better lateral than axial resolution.

• True

• False

What is true of axial resolution? Choose all that apply

• Is also called longitudinal, range, and depth (LARRD)

• The ability of the system to display 2 structures that are very close together when the structures are parallel to the sound beam (front to back)

• Units = mm

• Typical Value = 0.1-1mm (the smaller the better)

• The ability of the system to display 2 structures that are very close together when the structures are parallel to the sound beam (Side to side)

What is the equation for axial resolution?

• Axial Resolution (mm) = SPL(mm)/2

• Axial Resolution (mm) = 2/SPL (mm)

• Axial Resolution = Beam Diameter

• Axial Resolution = SPL

(choose all that apply) Axial Resolution can be improved with:

• Short SPL and wavelength

• Damping (providing short pulses)

• Increasing Frequency

• Decreasing Frequency

• Long SPL and wavelength

The question "What is the minimum distance that 2 structures positioned front to back (or parallel to the beam) can be apart and still produce 2 distinct echoes?" can be answered with the equation for ________.

• Axial Resolution

• Lateral Resolution

• Elevation Resolution