2
Davies Ultrasound Physics Review questions with accurate
|| || || || || || ||
detailed answers ||
Where is the point of maximum intensity in a sound beam?
|| || || || || || || || || || ||
A: Curie point
|| || ||
B: Fresnel zone
|| || ||
C: Focal point
|| || ||
D: Fraunhofer zone
|| || ||
E: F number - ✔✔C: Focal point
|| || || || || ||
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 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. - ✔✔C.
|| || || || || || || || || || || || || ||
Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a
|| || || || || || || || || || || || || || || ||
quality image. ||
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
|| || ||
,2
D: Increase transmit power
|| || || ||
E: Increase frame averaging - ✔✔D: Increase transmit power
|| || || || || || || ||
To minimize the risk of biological effects of ultrasound to the fetus, which imaging mode
|| || || || || || || || || || || || || || ||
tradeoff 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. - ✔✔A. Use M-mode instead of pulsed-wave Doppler to measure the
|| || || || || || || || || || || || || || || ||
fetal heart rate.
|| ||
What potential bioeffect occurs through absorption of sound energy by tissue?
|| || || || || || || || || ||
A. Cavitation
||
B. Heating
|| ||
C. Attenuation
|| ||
D. Reflection
|| ||
E. Refraction - ✔✔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. - ✔✔E: Wash gloves
|| || || || || || || || || || || || || || || ||
between exams for re-use from one patient to another.
|| || || || || || || ||
,2
A nosocomial infection is defined as one that:
|| || || || || || || ||
A. Is resistant to antibiotics
|| || || ||
B. Is restricted to the respiratory system
|| || || || || || ||
C. Is hospital-acquired
|| ||
D. Is not contagious
|| || || ||
E. Requires patient isolation - ✔✔C. Is 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. - ✔✔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 || ||
E: These intensity descriptors are only used for continuous-wave ultrasound. - ✔✔A: SATA
|| || || || || || || || || || || ||
Increased tissue heating could occur when you:
|| || || || || || ||
A: Decrease frequency.
|| || ||
, 2
B: Increase transmit power.
|| || || ||
C: Decrease exposure time.
|| || || ||
D: Decrease pulse repetition frequency.
|| || || || ||
E: All of the above - ✔✔B: Increase transmit power.
|| || || || || || || || ||
A study designed to determine if there is an association between an adverse effect in a
|| || || || || || || || || || || || || || || ||
population and exposure to a particular agent is a(n): || || || || || || || || ||
A: Case report
|| || ||
B: Epidemiological study
|| || ||
C: In vitro study
|| || || ||
D: In vivo study
|| || || ||
E: Single-incident investigation - ✔✔B: Epidemiological study
|| || || || || ||
Which of the following actions is NOT compliant with HIPAA?
|| || || || || || || || ||
A. Cropping all patient identifiers from images used for teaching purposes.
|| || || || || || || || || || ||
B. Refraining from disclosing patient health information without proper authorization
|| || || || || || || || || ||
C. Reviewing your neighbor's medical studies on your hospital PACS system so you can
|| || || || || || || || || || || || || ||
giver her an opinion of her condition
|| || || || || || ||
D. Covering your daily requisition list so that the names are not visible to patients and
|| || || || || || || || || || || || || || || ||
visitors ||
E. All of these actions are compliant with HIPAA - ✔✔C. Reviewing your neighbor's
|| || || || || || || || || || || || || ||
medical studies on your hospital PACS system so you can giver her an opinion of her
|| || || || || || || || || || || || || || || ||
condition
What does the mechanical index indicate on an ultrasound system?
|| || || || || || || || ||
A. The maximum temperature increase in tissue
|| || || || || || ||
B. The minimum temperature increase in tissue
|| || || || || || ||
Davies Ultrasound Physics Review questions with accurate
|| || || || || || ||
detailed answers ||
Where is the point of maximum intensity in a sound beam?
|| || || || || || || || || || ||
A: Curie point
|| || ||
B: Fresnel zone
|| || ||
C: Focal point
|| || ||
D: Fraunhofer zone
|| || ||
E: F number - ✔✔C: Focal point
|| || || || || ||
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 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. - ✔✔C.
|| || || || || || || || || || || || || ||
Complete the diagnostic scan in a timely fashion at the lowest output power that achieves a
|| || || || || || || || || || || || || || || ||
quality image. ||
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
|| || ||
,2
D: Increase transmit power
|| || || ||
E: Increase frame averaging - ✔✔D: Increase transmit power
|| || || || || || || ||
To minimize the risk of biological effects of ultrasound to the fetus, which imaging mode
|| || || || || || || || || || || || || || ||
tradeoff 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. - ✔✔A. Use M-mode instead of pulsed-wave Doppler to measure the
|| || || || || || || || || || || || || || || ||
fetal heart rate.
|| ||
What potential bioeffect occurs through absorption of sound energy by tissue?
|| || || || || || || || || ||
A. Cavitation
||
B. Heating
|| ||
C. Attenuation
|| ||
D. Reflection
|| ||
E. Refraction - ✔✔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. - ✔✔E: Wash gloves
|| || || || || || || || || || || || || || || ||
between exams for re-use from one patient to another.
|| || || || || || || ||
,2
A nosocomial infection is defined as one that:
|| || || || || || || ||
A. Is resistant to antibiotics
|| || || ||
B. Is restricted to the respiratory system
|| || || || || || ||
C. Is hospital-acquired
|| ||
D. Is not contagious
|| || || ||
E. Requires patient isolation - ✔✔C. Is 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. - ✔✔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 || ||
E: These intensity descriptors are only used for continuous-wave ultrasound. - ✔✔A: SATA
|| || || || || || || || || || || ||
Increased tissue heating could occur when you:
|| || || || || || ||
A: Decrease frequency.
|| || ||
, 2
B: Increase transmit power.
|| || || ||
C: Decrease exposure time.
|| || || ||
D: Decrease pulse repetition frequency.
|| || || || ||
E: All of the above - ✔✔B: Increase transmit power.
|| || || || || || || || ||
A study designed to determine if there is an association between an adverse effect in a
|| || || || || || || || || || || || || || || ||
population and exposure to a particular agent is a(n): || || || || || || || || ||
A: Case report
|| || ||
B: Epidemiological study
|| || ||
C: In vitro study
|| || || ||
D: In vivo study
|| || || ||
E: Single-incident investigation - ✔✔B: Epidemiological study
|| || || || || ||
Which of the following actions is NOT compliant with HIPAA?
|| || || || || || || || ||
A. Cropping all patient identifiers from images used for teaching purposes.
|| || || || || || || || || || ||
B. Refraining from disclosing patient health information without proper authorization
|| || || || || || || || || ||
C. Reviewing your neighbor's medical studies on your hospital PACS system so you can
|| || || || || || || || || || || || || ||
giver her an opinion of her condition
|| || || || || || ||
D. Covering your daily requisition list so that the names are not visible to patients and
|| || || || || || || || || || || || || || || ||
visitors ||
E. All of these actions are compliant with HIPAA - ✔✔C. Reviewing your neighbor's
|| || || || || || || || || || || || || ||
medical studies on your hospital PACS system so you can giver her an opinion of her
|| || || || || || || || || || || || || || || ||
condition
What does the mechanical index indicate on an ultrasound system?
|| || || || || || || || ||
A. The maximum temperature increase in tissue
|| || || || || || ||
B. The minimum temperature increase in tissue
|| || || || || || ||
