SPI Radiology Mock Exam Questions & Answers, Rated 100%

SPI Radiology Mock Exam Questions & Answers, Rated 100%-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 - D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium - B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Operating frequency D. Velocity of the reflector E. Propagation speed if the medium - D. Velocity of the reflector In the Fraunhofer zone, the beam: A. Width diverges B. Is conical in shape C. Intensity is greatest D. Intensity is inconsistent E. Widens towards the focal zone - A. Width diverges Artifacts consisting of parallel equally spaced lines are characteristic of: A. Multipath B. Grating lobes C. Reverberation D. Range ambiguity E. Acoustic shadowing - C. Reverberation An increase in reflection amplitudes from reflectors that lie behind a weakly attenuating structure is called: A. Comet tail artifact B. Shadowing C. Slice thickness artifact D. Acoustic enhancement E. Propagation speed error - D. Acoustic enhancement The ratio of the largest power to the smallest power the ultrasound system can handle describes: A. Amplitude B. Bandwidth C. Compensation D. Dynamic range E. Contrast resolution - D. Dynamic range Axial resolution directly related to the: A. Penetrating depth B. SPL C. Temporal resolution D. Tx diameter E. Operating frequency - E. Operating frequency When voltage is applied to the piezoelectric crystal, the crystal will: A. Vibrate B. Increase in size C. Decrease in size D. Remain unchanged E. Increase or decrease according to the polarity - E. Increase or decrease according to the polarity