Davies SPI Review EXAM QUESTIONS AND ANSWERS 100% SOLVED (Newest 2025) Will not cause a redirection of part of the ultrasound energy - Correct Answers ✅absorption You are scanning a large mass composed primarily of fat.What will you most likely encounter? - Correct Answers ✅axial misregistration of object distal to the mass on the screen due to the slower propagation speed through fat What 2 conditions must be present to cause a refraction in soundwave? - Correct Answers ✅oblique incidence and change in propagation speed What may be detected with refraction? - Correct Answers ✅lateral misregistration
Of the following structures, which is the most attenuating:
blood, bile, lung tissue, calcification? - Correct Answers ✅calcifications - leaves a shadow What can you do to enhance the visibility of specular reflectors? - Correct Answers ✅perpendicular incidence What tissue/sound interaction is primarily responsible for imaging internal structures of organs? - Correct Answers ✅scattering 1 / 3
Davies SPI Review EXAM QUESTIONS AND ANSWERS 100% SOLVED (Newest 2025) What tissue/sound interaction is necessary for an ultrasound image? - Correct Answers ✅reflection For soft tissues, what is needed for determining what a specific impedance is? - Correct Answers ✅bulk modulus and interface You are imaging a structure that is highly attenuating. What imaging artifact would you expect to encounter? - Correct Answers ✅shadowing Does sound travel slower through air or through soft tissue? - Correct Answers ✅air An increase in transmit power changes what? - Correct Answers ✅acoustic power What would you change if image does not show adequate penetration in far field and shows noise instead of tissue? - Correct Answers ✅decrease the transmit frequency because lower frequency penetrates better What is the range of frequencies for human hearing? - Correct Answers ✅20Hz - 20,000Hz 2 / 3
Davies SPI Review EXAM QUESTIONS AND ANSWERS 100% SOLVED (Newest 2025) Maximum cyclical change in quantity is known as? - Correct Answers ✅amplitude Bulk modulus is closely related to? - Correct Answers ✅stiffness Time it takes for one ? - Correct Answers ✅period If number of cycles in a pulse is increased but wavelength remains the same, what changes? - Correct Answers ✅pulse duration Which transducer would you use for a large patient that would have the least amount of signal attenuation? - Correct Answers ✅lower frequency - goes deeper Speed of ultrasound in bone? - Correct Answers ✅4080 m/s Speed of sound is defined as? - Correct Answers ✅speed at which sound propagates through a medium
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