ARDMS SPI Practice A & B exam Questions and Answers (2022/2023)

ARDMS SPI Practice A & B exam Questions and Answers (2022/2023) 1. Cans) What is dynamic aperture? A. aperture that varies with transmit frequency B. aperture that decreases as a function of time C. aperture that increases with increasing focal length D. aperture that changes as a function of frame rate 2. Aans) to which acoustic variable is penetration depth inversely related? A.frequency B.wavelength C.period D.propagation speed 3. Bans) which imaging mode requires a broadband transducer? A.continuous wave doppler B. Pulsed wave doppler C. color flow imaging D. harmonic imaging 4. Bans) what is the doppler shift frequency? A. recieved ultrasound frequency multiplied by the transmitted ultrasound frequen- cy B. difference between the transmitted ultrasound frequency and the received ultra- sound frequency C. sum of the transmitted and received ultrasound frequencies D. ratio of the transmitted ultrasound frequency to the received ultrasound frequen- cy 5. Aans) what is the potential effect of increasing the pulse repetition frequency(PRF)? A.Depth ambiguity B.Decreased frame rate C.Poor spatial resolution D.Decreased penetration 6. Bans) what is an advantage of using pulsed wave doppler compared to continuous wave doppler? A. higher echo sensitivity B. ability to select sample depth C.decreased display of aliasing D.improved temporal resolution 7. Dans) what affects the beam width in the near field? A.Pulse repetition frequency B.Pulse duration C.Frame rate D.Transducer aperture 8. Dans) what is the advantage of using pulsed-wave doppler versus continuous-wave doppler? A. allows measurement of higher velocities B.increases range ambiguity C.reduces the potential for aliasing D.provides depth specificity 9. Dans) which parameter is target group C evaluating based on the i A.dead zone B. dynamic range C. axial resolution D. Horizontal distance accuracy 10. Aans) In this image, which target group is used to evaluate dead z 11. Cans) which ultrasound parameter directly affects an ultrasound beam's intensity? A.TGC B.operating frequency C.Output power D.Frame rate 12. Dans) the center frequency of a transducer depends primarily upon which charac- teristics of the crystal? A.width B.length C.spacing D.thickness 13. Cans) which factor limits image frame rate? A.transducer operating frequency B.Sample volume size C.Speed of sound in tissue D.Spatial pulse length 14. Aans) when using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest? A.fat B.blood C.bone D.muscle 15. Dans) which term describes the averaging together of scan lines from multiple angles to create one image? A. harmonic imaging B. realtime three dimensional imaging C.elastography D.spatial compounding 16. Aans) which variable can cause an acoustic shadow artifact? A.small acoustic impedance mismatch B.refraction C.perpendicular incidence D.low attenuation