ARDMS SPI EXAM

Which gain will increase the risk of bioeffects? a. transmit b. receive c. gain d. overall gain - Answer- a. transmit Which of the following is considered the memory of an ultrasound instrument? a. pulser b. transducer c. receiver d. beam former e. digital scan converter f. display monitor - Answer- e. digital scan converter Spectral broadening suggest: a. laminar flow b. turbulent flow c. flow away from the transducer d. flow towards the transducer - Answer- b. turbulent flow With pulse wave Doppler axial resolution: - Answer- degrades What color is usually use in color flow Doppler variance map to indicate turbulent flow? - Answer- green Doppler high pass filter eliminates: - Answer- high amplitude signals; low velocity flow The Doppler wall filter is considered a: - Answer- high pass filter The Nyquist Limit is equal to: a. propagation speed x frequency b. propagation speed/ wavelength c. PRF/2 d. 4xV^2 - Answer- c. PRF/2 Multiple echoes, equally spaced originating from a gas bubble is called: a. comet tail b. ring down c. slice thickness artifact d. multipath - Answer- b. ring down An increase in red blood cell velocity will_____ the Doppler Shift: a. increase b. d