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SPI off Annie's Notes| 441 questions| with complete solutions

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Relationship between FREQUENCY & WAVELENGTH? CORRECT ANSWERS: inverse Equation for WAVELENGTH CORRECT ANSWERS: wavelength (mm) = prop speed (mm/microsec)/frequency (MHz) (L = C/F) Equation of WAVELENGTH in soft tissue CORRECT ANSWERS: wavelength (mm) = 1.54 (mm/microsec) / frequency (MHz) ...

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RVT URR Practice Test 1: QA, Safety, and SPI (14%) QUESTIONS WITH COMPLETE SOLUTIONS

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If a renal artery Doppler exam demonstrates normal flow, but stenosis is identified on angiography evaluation, the US results are described as: a.) False negative b.) False positive c.) True negative d.) True positive CORRECT ANSWERS: a.) False negative What information from an angiography ...

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SPI off Annie's Notes| 441 questions| with complete solutions

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Relationship between FREQUENCY & WAVELENGTH? CORRECT ANSWERS: inverse Equation for WAVELENGTH CORRECT ANSWERS: wavelength (mm) = prop speed (mm/microsec)/frequency (MHz) (L = C/F) Equation of WAVELENGTH in soft tissue CORRECT ANSWERS: wavelength (mm) = 1.54 (mm/microsec) / frequency (MHz) ...

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SPI mock exam| 106 questions| with complete solutions

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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 CORRECT ANSWERS: D. ALARA principle The number of cycles in a pulse directly related to the: A. Dut...

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SPI PRACTICE| 322 QUESTIONS| with complete solutions

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Sound waves are: CORRECT ANSWERS: longitudinal, mechanical The speed of sound in soft tissue is closest to: CORRECT ANSWERS: 1,500 m/s The frequency closest to the lower limit of ultrasound is: CORRECT ANSWERS: 15,000 Hz Which is not an acoustic variable? CORRECT ANSWERS: intensity T...

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Davies SPI REVIEW| 1705 QUESTINS| 178 PAGES| WITH COMPLETE SOLUTIONS

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What action below would be most in keeping with the ALARA principle while performing a diagnostic ultrasound examination? A: Allow multiple students to scan an obstetrical patient because the fetus is in a good position for imaging. B: Prolong the sonogram to make videos of the fetus for each fam...

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Edelmen's SPI Exam Review| 222 QUESTIONS| WITH COMPLETE SOLUTIONS

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Sound waves are: a) electric b) mechanical, transverse c) spectral d) longitudinal, mechanical CORRECT ANSWERS: D The speed of sound of ultrasound in soft tissue is closest to: a) 1,540 km/sec b) 1.54 km/sec c) 1,500 m/s d) 1,540 mm/sec CORRECT ANSWERS: C Which is not an acoust...

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SPI Exam Review| 66 QUESTIONS| WITH COMPLETE SOLUTIONS

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What is a hydrophone? What does it measure? CORRECT ANSWERS: A small needle with piezoelectric crystal at the end. It measures pressure in a sound beam. What is a schlieren? CORRECT ANSWERS: A machine that uses acousti-optics to measure sound and light in beam profiles. What is a calorimeter...

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SPI TEST| 184 QUESTIONS| WITH COMPLETE SOLUTIONS

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Concentration of force in an area. Units are: (Pa) or Pascals. CORRECT ANSWERS: Pressure What are the units for density? CORRECT ANSWERS: kg/cm3 What are the seven acoustic parameters and what are they determined by? CORRECT ANSWERS: -Period determined by SOURCE -Frequency determined by SO...

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SPI review| 374 QUESTIONS| WITH COMPLETE SOLUTIONS

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Incident intensity is? CORRECT ANSWERS: The intensity of the sound beam just before it strikes a reflector Describe normal incidence, and oblique incidence. CORRECT ANSWERS: Normal incidence is when the sound beam hits a reflector at a 90* angle, and oblique is any angle other than 90*. Rayl...

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SPI Practice Test| 175 QUESTIONS| WITH COMPLETE SOLUTIONS

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

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Spi mock exam questions with complete solutions

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When the ELASTICITY of a medium is HIGH, the _____ is HIGH - stiffness - prop. speed - compressibility - reflectivity CORRECT ANSWERS: compressibility What term describes the # of cycles that an acoustic variable completes in a second? - period - freq. - PRP - variable rate C...

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SPI Exam 1| 105 QUESTIONS| WITH COMPLETE SOLUTIONS

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Ultrasound Physics CORRECT ANSWERS: An accurate diagnosis requires an accurate representation of cardiac anatomy An accurate representation of cardiac anatomy is influenced by principles of ultrasound physics and design of instrumentation Sonography CORRECT ANSWERS: "To write with sound" So...

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SPI Exam| 505 Questions| WITH COMPLETE SOLUTIONS

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

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SPI Exam TEST| 120 QUESTIONS| WITH COMPLETE SOLUTIONS

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All of the following are AIUM recommendations regarding the use of ultrasound, except: A. Always adhere to the ALARA principle when scanning B. Limit the examination time to the shortest time necessary to complete a diagnostic exam C. In order to limit ultrasound intensity, always use PW Doppler ...

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Doppler (SPI)| 75 QUESTIONS| WITH COMPLETE SOLUTIONS

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The doppler effect is observed as a change in ________ and has units of _________. CORRECT ANSWERS: Frequence, per second In clinical imaging, which reflectors produce most relevant Doppler shifts? CORRECT ANSWERS: Red blood cells If red blood cells are traveling TOWARD a trasducer, the F em...

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SPI RELATIONSHIPS 58 QUESTIONS| WITH COMPLETE SOLUTIONS

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frequency and period CORRECT ANSWERS: inverse stiffness and propagation speed CORRECT ANSWERS: direct density and propagation speed CORRECT ANSWERS: inverse frequency and wavelength CORRECT ANSWERS: inverse power and amplitude CORRECT ANSWERS: direct proportional to amplitude squ...

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Physics SPI Exam| 81 QUESTIONS| WITH COMPLETE SOLUTIONS

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When sound hits a boundary between two media of the same propagation speed at oblique incidence: CORRECT ANSWERS: no refraction will occur. Refraction requires the oblique incidence of sound across a boundary between two media with different propagation speeds. As transducer frequency increas...

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URR SPI QUESTIONS AND ANSWERS 100% CORRECT

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what is an artifact CORRECT ANSWERS: echo that do not correspond actual with anatomy, not in right location, size or shape, Too bright or dark, missing from image completely. propagation artifacts CORRECT ANSWERS: occur due to bending (refraction), redirection (reflection) or reverberation of s...

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SPI Practice Questions #1 WITH COMPLETE SOLUTIONS

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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 CORRECT ANSWERS: B. The abs...

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SPI Doppler| 63 QUESTIONS| WITH COMPLETE SOLUTIONS

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Doppler Shift CORRECT ANSWERS: Doppler Frequency - A change or variation in the frequency of sound as a result of motion between the sound source & the receiver. = received frequency - transmitted frequencies Positive Doppler Shift CORRECT ANSWERS: Reflected frequency is higher than transmitt...

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SPI 2023| 553 QUESTIONS| WITH COMPLETE SOLUTIONS

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Absorption CORRECT ANSWERS: The conversion of sound energy to heat Acoustic speckle CORRECT ANSWERS: The interference pattern caused by scatters and produces the granular appearance of tissue on a sonographic image Amplitude CORRECT ANSWERS: The maximum or minimum deviation of an acoustic v...

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SPI exam 1| 86 QUESTIONS| WITH COMPLETE SOLUTIONS

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Electronic pulses from the pulser are applied to the CORRECT ANSWERS: Transducer Which of the following is performed by the receiver CORRECT ANSWERS: Amplification, compensation, compression, demodulation The dynamic range of ultrasound system is defined as CORRECT ANSWERS: The ratio of the...

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URR : SPI QUESTIONS AND ANSWERS

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Sensitivity CORRECT ANSWERS: ability of a test to detect disease when it IS present Specificity CORRECT ANSWERS: ability of a test to rule out disease when it is NOT present Positive Predictive Value (PPV) CORRECT ANSWERS: Calculates how often a positive study is correctly diagnosed: abilit...

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Penny SPI QUESTIONS WITH COMPLETE SOLUTIONS

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Which of the following is used to eliminate the low-frequency signals that appear as noise as a result of wall/valve motion? A. High-pass filter B. Bass-thump filter C. Low-pass filter D. High-frequency filter CORRECT ANSWERS: A. High-pass filter AKA wall filter AKA wall-thump filter Acco...

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ARDMS SPI Exam Multiple Choice Questions WITH COMPLETE SOLUTIONS

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Which gain will increase the risk of bioeffects? a. transmit b. receive c. gain d. overall gain CORRECT ANSWERS: a. transmit Which of the following is considered the memory of an ultrasound instrument? a. pulser b. transducer c. receiver d. beam former e. digital scan converter f. disp...

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ARDMS SPI STUDY GUIDE| 180 QUESTIONS| WITH COMPLETE SOLUTIONS

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In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... CORRECT ANSWERS: Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? CORRECT ANSWERS: 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in COR...

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SPI Practice (ARDMS A & B)| 80 QUESTIONS| WITH COMPLETE SOLUTIONS

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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 CORRECT ANSWERS: C to which acoustic variable is penetration dep...

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ARDMS- SPI QUIZ| 503 QUESTIONS| WITH COMPLETE SOLUTIONS

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The horizontal axis, or x-axis CORRECT ANSWERS: Runs side to side The vertical axis, or y-axis CORRECT ANSWERS: Runs up and down Unrelated CORRECT ANSWERS: Two items that are not associated Related or Proportional CORRECT ANSWERS: Two items that are associated or affiliated However, t...

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ARDMS SPI Practice Exam B QUESTIONS WITH COMPLETE SOLUTIONS

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Which artifact is illustrated by this image? CORRECT ANSWERS: a) Shadowing b) Side Lobe c) Reverberation d) Mirroring What is increased if the pulse duration is decreased? CORRECT ANSWERS: a) Bandwidth b) Line Density c) Frame Rate d) Duty Factor What is the most appropriate action fo...

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