SPI 試験問題を無料オンラインアクセス

Which spectral Doppler finding can occur when using a low pulse repetition frequency setting?

• A.Spectral broadening
• B.Range ambiguity
• C.Aliasing
• D.Dropout

How is the wavelength affected when switching from a 10 MHz transducer to a 5 MHz transducer?

• A.Halves
• B.Quarters
• C.Quadruples
• D.Doubles

Which adjustment produced the change from waveform A to waveform B?
A close-up of a graph Description automatically generated

• A.Increased wall filter
• B.Decreased Doppler gain
• C.Decreased wall filter
• D.Increased Doppler gain

Which Doppler control adjustment could eliminate the end-diastolic velocity in the Doppler spectrum?

• A.Increased velocity scale
• B.Increased wall filter
• C.Increased packet size
• D.Increased Doppler gain

What relates bandwidth to operating frequency?

• A.Autocorrelation
• B.Nyquist limit
• C.Quality factor
• D.Focal zone