Study guides, Class notes & Summaries

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution-ans Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing-ans

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle-ans E. Poiseuille principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL-ans C. operating frequency D. PRF E. propagation speed of the medium

What is described as the ability of an object to resist compression and relates to the hardness of a medium? stiffness An increase in PRF would lead to an increase in DF what has the higher propagation speed? air, bone, soft tissue or water bone what has a lower propagation speed? water, soft tissue, bone or lung tissue lung tissue

What is described as the ability of an object to resist compression and relates to the hardness of a medium? - ️️stiffness An increase in PRF would lead to - ️️an increase in DF what has the higher propagation speed? air, bone, soft tissue or water - ️️bone what has a lower propagation speed? water, soft tissue, bone or lung tissue - ️️lung tissue as imaging depth increases, the PRF must - ️️decrease what law describes the amount of refraction that occurs at an...

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle - ️️D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium - ️️B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Operatin...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - ️️d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - ️️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 increases penetration c. causes poor axial and lateral...

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 ...

SPI Practice Questions #1 2023/2024 B. The absence of echos Question 1 Explanation: An (without) echoic (producing echoes) - ANSWER-1. The term Anechoic in relation to a sonographic image means? A. structure that appears lighter than the surrounding structures B. The absence of echos C. A structure that appears the same as surrounding structures D. A structure that reflects 100% of the sound wave C.The system with the larger diameter crystal. - ANSWER-2. If you have two near identic...

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...