SPI Practice Exam Study Questions and Answers 2024

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. B. System has low dynamic range. C. Transducer crystals are damaged. D. Focus control is malfunctioning. -answer- Transducer crystals are damaged What is dynamic aperture? A. Aperture that varies with transmit frequency B. Aperture that deceases as a function of time C. Aperture that increases with increasing focal length D. Aperture that changes as a function of frame rate -answer- Aperture that increases with increasing focal length Which variable can cause an acoustic shadow artifact? A. Small acoustic impedance mismatch B. Refraction C. Perpendicular incidence D. Low attenuation -answer- Small acoustic impedance mismatch What control improved the effects of attenuation? A. Dynamic range B. Pulse Inversion C. Multiple focal zones D. TGC -answer- TGC What is the potential effect of increasing the PRF? A. Depth ambiguity B. Decreased frame rate C. Poor spatial resolution D. Decreased penetration -answer- Decreased penetration How is lateral resolution determined for a pulse-echo system using a tissue-mimicking test object? A. By observing spaces between reflectors perpendicular to the beam B. By observing spaces between reflectors along the beam path C. By observing position of deepest visible reflector along the beam path D. By observing position of deepest visible reflector perpendicular to the beam path -answer- By observing spaces between reflectors perpendicular to the beam According to ALARA guidelines, which parameter should be minimized? A. Transmit power B. Frequency C. TGC D. Overall gain -answer- Transmit power Which statement is most acurate regarding surface rendering 3D ultrasound imaging? A. Improves accuracy of volume measurement B. Minimizes effect of attenuation artifacts C. Spatial resolution improve when using high resolution mesh D. Feature-based reconstruction store full 3D volume acquired -answer- Minimizes effect of attenuation artifacts Which artifact is indicated by the arrows in this image? A. Shadow produced by the diaphragm B. Acoustic enhancement C. Comet tail D. Mirror image -answer- Comet tail Which imaging modality can provide the most accurate measurement of tumor volume? A. Color Doppler B. B-mode C. A - mode D. M-mode -answer- B-mode