Online Access Free SPI Practice Test

Which action may reduce the number of lines in a frame without a loss of temporal resolution?

• A.Narrowing the field of view
• B.Reducing the frame rate
• C.Decreasing the transducer frequency
• D.Decreasing the display depth

Which function is the purpose of the matching layer?

• A.Convert acoustic to electrical energy
• B.Reduce ringing of the crystals
• C.Increase sound transmission
• D.Allow sequential firing of elements

Which technique averages individual frames together to improve the image?

• A.Compression
• B.Persistence
• C.Harmonic imaging
• D.Coded excitation

Which function can decrease noise?

• A.Frequency
• B.Sector width
• C.Persistence
• D.Depth

If the pulse repetition frequency is 3 kHz, what is the maximum Doppler shift that can be detected without aliasing?

• A.1.5 kHz
• B.3.0 kHz
• C.6.0 kHz
• D.9.0 kHz