Online Access Free SPI Exam Questions

What is an advantage of pulsed-wave Doppler over continuous-wave Doppler?

• A.Increased sensitivity to slow flow
• B.Range resolution
• C.Unlimited maximum detectable velocity
• D.High signal-to-noise ratio

Which artifact is caused by defects in the crystals of the transducer?

• A.Side lobe
• B.Ringdown
• C.Dropout
• D.Mirror image

What causes increased echogenicity distal to an anechoic structure?

• A.Reduced attenuation through the structure
• B.Reduced penetration through the structure
• C.Increased attenuation distal to the structure
• D.Increased attenuation within the structure

Which factor does a string phantom evaluate?

• A.Intensity values
• B.Flow velocity
• C.Slice thickness
• D.Two-dimensional resolution

What is the primary reason lateral resolution varies at different depths?

• A.Pulse length
• B.Tissue texture
• C.Acoustic impedance
• D.Beam width