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 d.

When the ELASTICITY of a medium is HIGH, the _____ is HIGH - stiffness - prop. speed - compressibility - reflectivity compressibility

SPI PRACTICE QUESTIONS & ANSWERS 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 interfer...

SPI exam review questions & answers 2024 When using a 3-6MHz transducer, which frequency will offer the best penetration? - ANSWER-3MHz Which transducer component improves lateral resolution? - ANSWER-pulser 3. Mirrors and lenses can be used to ________________. • A. improve sound transmission into the body • B. increase the PRF of the transducer • C. electronically focus the US beam • D. mechanically focus the US beam - ANSWER-D. mechanically focus the US beam 4. Wh...

SPI exam questions & answers 2024 which of the following is determined by the frequency of the voltage applied to the ultrasound system - continuous wave -pulsed wave -color doppler -power doppler - ANSWER-continuous wave the formula used to determine velocity, what is divided by time? -distance -friction -inertia -hydrostatic pressure - ANSWER-distance low-resistance waveforms display a slow upstroke in -systole -diastole -pulsatile -phasic - ANSWER-systole can compr...

SPI review- Resolution Exam Questions & Answers 2024

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...

SPI Exam Review Questions & Answers 2024 ultrasound imaging type in which pulses are reflected and used to produce a display - ANSWER-pulsed wave brightness of the dots on image - ANSWER-amplitude round-trip travel time per cm in soft tissue - ANSWER-13 microseconds A line produced on a display that represents ultrasonic echoes returning from the body. A sonographic image is composed of many such lines. - ANSWER-scan line Type of image presented in a rectangular format. - Each ...

SPI Exam Review Questions & Answers 2024 Which is not a measure of area? A. square cm B. Meters squared C. Cubic Meters D. Feet x feet - ANSWER-C. Cubic meters Which of the following could be a measurement of a perimeter of a structure? A. 6 cm^2 B. 5 cc C. 15 mm D. m^4 - ANSWER-C. 15 mm What units are associated with the circumference of a circle? A. mm B. mm^2 C. cm^3 D. m^4 - ANSWER-A. mm Which is an example of a measure for volume? A. 6 B. 6 cm C. 6 cm^2 D. 6 ...

SPI EXAM PREP QUESTIONS & ANSWERS 2024 What is a process that redirects the beam intensity? - ANSWER-Scattering For every 3 dB the intensity will what? - ANSWER-Double At what value does ultrasound begin? - ANSWER-Greater than 0.02 MHz Artifacts associated with axial resolution are the result of what? - ANSWER-Pulse length-Axial Resolution = Spatial Pulse Length. Which artifact is created through acoustic focusing of an ultrasound beam? - ANSWER-Enhancement Sound traveling th...