Free Sonography Principles and Instrumentation (ARDMS SPI) Exam SPI Exam Practice Test

Which change improves temporal resolution during color flow imaging?

• Increase field of view
• Decrease transmit frequency
• Decrease packet size
• Increase line density

Which describes the reflected frequency when a reflector is moving toward the sound source?IncreasedDecreasedUnchangedAttenuated

• , Martin, K., & Whittingham, T. A. (2010). Diagnostic Ultrasound: Physics and Equipment.

What does changing the displayed depth control directly affect?

• Pulse repetition frequency
• Transducer transmit frequency
• Pulse duration
• Spatial pulse length

Which change can be made in order to avoid exceeding the Nyquist limit?

• Increase output power
• Decrease output power
• Increase pulse repetition frequency
• Decrease pulse repetition frequency

If the speed of sound in a medium is less than the average speed of sound in soft tissue, where will the echo be placed on an image?

• Too shallow
• Not visualized
• Laterally
• Too deep

Which action would increase the frame rate?

• Increasing the sector width
• Increasing the number of lines per frame
• Decreasing the logarithmic compression
• Decreasing the number of focal zones

Which feature is a characteristic of continuous wave Doppler?

• Range specificity
• Aliasing
• Low thermal index
• Dedicated transmit and receive crystals

Which control determines the amount of amplification occurring in the receiver?

• Output power
• Overall gain
• Dynamic range
• Persistence

What results from increasing the packet length when using color Doppler imaging?

• Decreased penetration
• Increased aliasing
• Increased color noise
• Decreased frame rate

Which technique averages individual frames together to improve the image?

• Coded excitation
• Compression
• Persistence
• Harmonic imaging