Davies SPI REVIEW| 1704 QUESTIONS| TEST BANK WITH COMPLETE SOLUTION

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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 i... s in a good position for imaging. B: Prolong the sonogram to make videos of the fetus for each family member. C: Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a quality image. D: Maximize the acoustic output to brighten the overall image. E: Extend the sonogram beyond the intended scope of the exam requisition. Correct Answer: C: Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a quality image. What does the ALARA principle stand for? Correct Answer: As Low As Reasonable Achievable During performance of an obstetrical ultrasound exam you adjust the system parameters to improve the image. Which of the following parameters would increase acoustic exposure? A: Increase gain B: Increase TGC C: Increase frequency D: Increase transmit power E: Increase frame averaging Correct Answer: D: Increase transmit power While performing a sonogram to minimize risk to the fetus which imaging mode trade off would be most applicable? A: Use M-mode instead of pulsed-wave Doppler to measure the fetal heart rate. B: Use color Doppler instead of power Doppler to image the umbilical cord. C: Use pulsed-wave Doppler instead of power Doppler to evaluate the fetal heart. D: Use harmonics instead of fundamental to image the fetal spine. E: All of the above. Correct Answer: A: Use M-mode instead of pulsed-wave Doppler to measure the fetal heart rate. Gain, TGC, and frame averaging do not affect _______ and therefore do not affect _______. Correct Answer: -Sound transmission -Exposure T or F: Increasing frequency does not increase exposure. Correct Answer: True What potential bioeffect occurs through absorption of sound energy by tissue? A: Cavitation B: Heating C: Attenuation D: Reflection E: Refraction Correct Answer: B: Heating When practicing universal precautions you should do all of the following EXCEPT: A: Wear gloves when there is a potential for contact with patient bodily fluids. B: Change gloves when moving from one patient to another. C: Wash hands immediately after gloves are removed. D: Wear face masks or eye protection whenever there is a possibility of blood splashing into your face. E: Wash gloves between exams for re-use from one patient to another. Correct Answer: E: Wash gloves between exams for RE-use from one patient to another. A nosocomial infection is defined as one that is: A: Resistant to antibiotics B: Restricted to the respiratory system C: Hospital-acquired D: Not contagious E: Requires isolation Correct Answer: C: Hospital-acquired Thermally induced biological effects should be preventable by avoiding a local tissue temperature increase exceeding: A: 1 degree C B: 4 degrees C C: 10 degrees C D: 95 degrees F E: None; thermal effects have no threshold. Correct Answer: A: 1 degree C Which intensity descriptor has the lowest numerical value for the characterization of a pulsed-wave ultrasonic field? A: SATA B: SPTA C: SATP D: SPTP [Show More]

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