Complete Package Deal For SPI PRACTICE EXAM QUESTIONS AND ANSWERS GRADED A 2024

C 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 A to which acoustic variable is penetration depth inversely rel...

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 transdu...

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 p...

Which gain will increase the risk of bioeffects? a. transmit b. receive c. gain d. overall gain - 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. display monitor - e....

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

The mass you are imaging has a diameter of 35mm. This value can also be expressed as: A: 350 cm B: 0.35 cm C: 3.5 cm D: 35 m E: 3.5 m -answer C Which of the following are types of cavitation? A: Stable and Thermal B: In vivo and In vitro C: Transient and Stable D: Spatial and Transie...

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 -answer- D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor ...

Which parameter is most likely to affect spatial resolution? Adynamic range B.beam width C.system sensitivity D.depth of visualization -answer- D.depth of visualization When using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest? A.fat B.blood C.bone D.muscle -answe...

Which term describes blood flow changes in response to respiration? A. Phasic B. Parabolic C. Spontaneous D. Pulsatile -answer- Phasic What is demonstrated in this image produced by a linear array to placed on a uniform tissue-mimicking phantom? A. Time gain compensation not set properly...

. A sound wave is: a. transverse b. electromagnetic c. mechanical, longitudinal d. transverse, longitudinal c. mechanical, longitudinal 2. A compression area of a sound wave is: a. high pressure, low density b. low pressure, low density c. high pressure, high density d. low pressure, high ...

Which of the following is described as the ability of an object to resist compression and relates to the hardness of the medium? a. Stiffness b. Density c. Pressure d. Inertia -answer- a. Stiffness An increase in pulse repetition frequency would lead to: a. an increase in DF b. an increase...

The direction of the Doppler shift determines: A. the peak velocity of the flow B. the color Doppler hue C. the average velocity of the flow D. the color Doppler luminance -answer- B. the color Doppler hue Color Hue - perceived color used to demonstrate direction (red and blue or positive and n...

What best describes a sound wave? -answer- A mechanical longitudinal wave What MUST be different on the two sides of an interface for refraction to occur? -answer- Propagation speed of sound and oblique incidence The characteristic acoustic impedance of a medium equals the product of -answer- ...

what improves temporal resolution -answer- low line density, high frame rate, narrow sector line, fewer pulse per frame which of the following is true when the dynamic aperature is increased -answer- near zone length increases Which of the following is the standard protocol for digital imaging...