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Sound waves are: - Answer longitudinal, mechanical The speed of sound in soft tissue is closest to: - Answer 1,500 m/s The frequency closest to the lower limit of ultrasound is: - Answer 15,000 Hz Which is not an acoustic variable? - Answer intensity The effects of soft tissue on ultrasound are called: - Answer acoustic propagation properties All of the following are true EXCEPT: - Answer two waves with identical frequencies must interfere constructively Put i...

SPI PRACTICE QUESTIONS 2023/2024 Sound waves are: - ANSWER-longitudinal, mechanical The speed of sound in soft tissue is closest to: - ANSWER-1,500 m/s The frequency closest to the lower limit of ultrasound is: - ANSWER-15,000 Hz Which is not an acoustic variable? - ANSWER-intensity The effects of soft tissue on ultrasound are called: - ANSWER-acoustic propagation properties All of the following are true EXCEPT: - ANSWER-two waves with identical frequencies must interfere const...

SPI Practice Test Questions & Answers 2023/2024 Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - ANSWER-d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - ANSWER-d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and in...

C - Answer 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 A - Answer to which acoustic variable is penetration depth inversely related? A.frequency B.wavelength C.period D.propagation speed B - Answer which imaging mode requires a broadband transducer? A.continuous wave doppler B.Pulsed wave doppler ...

What is frequency determined by? - Answer The source, thickness of piezoelectric element and propagation speed to a lesser degree Thicker element is equal to ________ frequencies - Answer Lower What is the reciprocal of frequency and what is the symbol - Answer Period, T The time it takes for 1 cycle to occur - Answer Period What is propagation speed determined by - Answer Stiffness and density of the medium Propagation speed of sound through soft tis...

Incident intensity is? correct answers The intensity of the sound beam just before it strikes a reflector Describe normal incidence, and oblique incidence. correct answers Normal incidence is when the sound beam hits a reflector at a 90* angle, and oblique is any angle other than 90*. Rayleigh scattering is correct answers sound scattering equally in all directions after hitting a reflector smaller than the beam wavelength. RBC's How would impedance increase? correct answers If the med...