ARDMS SPI Exam

Which gain will increase the risk of bioeffects? a. transmit b. receive c. gain d. overall gain correct answera. 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 correct answere. digital scan converter Spectral broadening suggest: a. laminar flow b. turbulent flow c. flow away from the transducer d. flow towards the transducer correct answer. turbulent flow With pulse wave Doppler axial resolution: correct answerdegrades What color is usually use in color flow Doppler variance map to indicate turbulent flow? correct answergreen Doppler high pass filter eliminates: correct answerhigh amplitude signals; low velocity flow The Doppler wall filter is considered a: correct answerhigh pass filter The Nyquist Limit is equal to: a. propagation speed x frequency b. propagation speed/ wavelength c. PRF/2 d. 4xV^2 correct answerc. 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 correct answerb. ring down An increase in red blood cell velocity will_____ the Doppler Shift: a. increase b. decrease c. not change d. cannot be predicted correct answera. increase The primary advantage of CW Doppler is: a. range resolution b. range discrimination c. range ambiguity d. range gating e. absence of sampling rate correct answer