Study guides, Class notes & Summaries

SPI ARDMS EXAM |Q & A |ALREADY GRADED A+ |2024 UPDATE What type of wave is sound? Correct Ans ~ mechanical and longitudinal The frequency ranges for ultrasound are: Correct Ans ~ >20 kHz The speed of sound in soft tissue is: Correct Ans ~ 1540 m/s which of the following transducers fires the elements in groups? A. Linear sequenced array B. Phased array C. Continuous-wave transducer D. Single-element transducer Correct Ans ~ A Enhancement is caused by** Correct Ans ~ weakly attenuati...

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...

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...

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

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

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

SPI EXAM | QUESTIONS AND ANSWERS | GRADED A+ | Sound waves are: longitudinal, mechanical The speed of sound in soft tissue is closest to: 1,500 m/s The frequency closest to the lower limit of ultrasound is: 15,000 Hz Which is not an acoustic variable? intensity The effects of soft tissue on ultrasound are called: acoustic propagation properties All of the following are true EXCEPT: two waves with identical frequencies must interfere constructivel

SPI Exam Questions & Answers 2024 What is described as the ability of an object to resist compression and relates to the hardness of a medium? - ANSWER-stiffness An increase in PRF would lead to - ANSWER-an increase in DF what has the higher propagation speed? air, bone, soft tissue or water - ANSWER-bone what has a lower propagation speed? water, soft tissue, bone or lung tissue - ANSWER-lung tissue as imaging depth increases, the PRF must - ANSWER-decrease what law describe...