Spi practice - Study guides, Class notes & Summaries

transducer Electronic pulses from the pulser are applied to the ? amplification, compensation, compression, and demodulation What functions are preformed by the receiver? the ratio of the maximum to the minimum intensity that can be displayed The dynamic range of an ultrasound system is described as? frequency divided by bandwidth How is the QF of a transducer determined? PZT The most common man-made crystal is : travel time and speed Which variables must be known in order to calculat...

Ultrasound waves that are traveling through a medium consist of a. electromagnetic and radio frequencies b. compressions and refractions c. electromagnetic and ionizing frequencies d. compressions and rarefactions - ️️d. What is the difference between audible sound and ultrasound? a. audible sound waves can travel through a vacuum b. audible sound has a higher frequency c. ultrasound has a higher frequency d. ultrasound waves are ionizing - ️️c. Damping in a transducer a. redu...

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 constructively Put in decreasing order: deci, deca, micro, centi - deca, deci, c...

SPI Practice (ARDMS A & B) Exam Questions and Answers (Latest Update 2025) 100% Verified Answers

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The time from the beginning of a pulse until its end is ______________? - ️️pulsed duration If the frequency of US is increased from 0.77MHz to 1.54MHz, what happens to the propagation speed? - ️️remains the same All of the following are true EXCEPT: - ️️two waves with identical frequencies must interfere constructively As a result of ______________, the propagation speed increases - ️️decreasing compressibility and density Sound waves are: - ️️longitudinal, mechanica...

what is the distance to the interface if the round trip time for a sound wave is 39 microseconds? o :## 3cm which signals are eliminated by the wall filter in a spectral Doppler display? o :## low frequency, low amplitude at minimum, what is required when documenting a pathology discovered during an examination? o :## two images demonstrating the same pathology from different scan planes If the diameter of the sound beam is halved by focusing, what happens to the intensity o :## Incre...

ARDMS SPI Practice Test - Form A & B Questions And Answers A+ Which variable caused the color change from blue to red of the vessel in this im- age? a. Change in vessel direc- tion b. Color scale set too low c. Turbulent flow d. Severe stenosis... Continues...

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