SPI 試験問題を無料オンラインアクセス

Which resolution capability is most affected by spatial pulse length?

• A.Lateral
• B.Temporal
• C.Elevational
• D.Axial

What are two types of cavitation in tissue?

• A.Heat and transient
• B.Thermal and stable
• C.Thermal and mechanical
• D.Stable and transient

What is the effect of increasing the overall gain?

• A.Compensation for attenuation at selected depths
• B.Increase in the amplitude of the transmitted pulse
• C.Amplification of signals from all depths
• D.Increase in the number of returning signals

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

• A.Increase pulse repetition frequency
• B.Increase output power
• C.Decrease pulse repetition frequency
• D.Decrease output power

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

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