DAVIES ULTRASOUND PHYSICS REVIEW
EXAM WITH CORRECT ACTUAL QUESTIONS
AND CORRECTLY WELL DEFINED ANSWERS
LATEST 2025 - 2026 ALREADY GRADED A+
***Which control optimization should you make to improve color doppler
sensitivity to slow flow? - ANSWERS-Lower the wall filter setting
To improve sensitivity to slow flow, the wall filter should be lowered. Increasing
packet size may slightly improve sensitivity since it affects the signal to noise
ratio. Increasing the doppler freq will increase the freq shift and thus improves
sensitivity to slow flow. Threshold controls the gray level that color is allowed to
over write and does not affect low flow sensitivity
***This doppler waveform is displayed below the zero baseline. Given the
settings displayed in this image, which of the following is true? - ANSWERS-The
direction of flow is toward the beam
,The color box and spectral doppler cursor are steered toward the patient head.
The doppler has been inverted. Therefore, flow toward the beam is indicated by
the color blue and displayed below the zero baseline
What statement is correct regarding the comparison of these two waveforms? -
ANSWERS-Waveform A indicates a low resistance state compared to waveform
B
The amount of diastolic flow in the two waveforms differs, and resistance is
best described thru the amount of flow during diastole. When there is
continuous forward flow thru out diastole, a low resistance state is indicated. If
the flow is coursing to an area of high resistance, the diastolic flow maybe
reversed or absent. Waveform A is a low resistance waveform B is a high
resistance waveform w flow reversal during early diastole and low flow in end
diastole
In this image, the red color indicated by the arrow represents: - ANSWERS-Flow
toward the ultrasound txd
4. What potential bioeffect occurs through absorption of sound energy by
tissue? - ANSWERS-Heating
Sound attenuation in tissue is primarily due to absorption (conversion of
ultrasound to heat).
,5. When practicing universal precautions, you should do all the following
EXCEPT: - ANSWERS-Wash gloves between exams for reuse from one patient to
another. (It is recommended that gloves be worn during every ultrasound
examination. They should be discarded after use).
-wear gloves when there is a potential for contract with patient body fluid
-change gloves when moving from one patient to another
-Wash hands immediately after gloves are removed
- Wear face masks or eye protection whenever there is a possibility of blood
splashing in your face
6. A nosocomial infection is defined as one that: - ANSWERS-Is hospital-acquired
7. Thermally induced biologic effects should be preventable by avoiding a local
tissue temperature increase exceeding: - ANSWERS-1°C
8. Which intensity descriptor has the lowest numeric value for the
characterization of a pulsed-wave ultrasonic field? - ANSWERS-SATA
SATA, a term that is infrequently used, means spatial average, time average.
Note: I(SPTA) is the spatial peak, time average intensity; I(SPTP) is the spatial
peak, temporal peak.
9* Increased tissue heating could occur when you: - ANSWERS-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 an: - ANSWERS-
Epidemiological study
Which of the following actions is NOT compliant w HIPPA? - ANSWERS-
Reviewing your neighbors medical studies on your hospital PACS system so you
can give her your opinion of her condition
The Health Insurance Portability and Accountability Act (HIPPA) includes rules to
protect the privacy of the individuals health information. This answer would
violate HIPPA
What does the mechanical index indicate on an ultrasound system? - ANSWERS-
The likelihood of cavitation during an ultrasound exam
Mechanical index is derived from the peak rarefaction pressure and the
ultrasound freq, parameters shown to be associated w onset of cavitation
In medicine, what do the initials PHI indicate? - ANSWERS-Protected health
information
14*What should you limit when the thermal index exceeds 1? - ANSWERS-
Exposure time
EXAM WITH CORRECT ACTUAL QUESTIONS
AND CORRECTLY WELL DEFINED ANSWERS
LATEST 2025 - 2026 ALREADY GRADED A+
***Which control optimization should you make to improve color doppler
sensitivity to slow flow? - ANSWERS-Lower the wall filter setting
To improve sensitivity to slow flow, the wall filter should be lowered. Increasing
packet size may slightly improve sensitivity since it affects the signal to noise
ratio. Increasing the doppler freq will increase the freq shift and thus improves
sensitivity to slow flow. Threshold controls the gray level that color is allowed to
over write and does not affect low flow sensitivity
***This doppler waveform is displayed below the zero baseline. Given the
settings displayed in this image, which of the following is true? - ANSWERS-The
direction of flow is toward the beam
,The color box and spectral doppler cursor are steered toward the patient head.
The doppler has been inverted. Therefore, flow toward the beam is indicated by
the color blue and displayed below the zero baseline
What statement is correct regarding the comparison of these two waveforms? -
ANSWERS-Waveform A indicates a low resistance state compared to waveform
B
The amount of diastolic flow in the two waveforms differs, and resistance is
best described thru the amount of flow during diastole. When there is
continuous forward flow thru out diastole, a low resistance state is indicated. If
the flow is coursing to an area of high resistance, the diastolic flow maybe
reversed or absent. Waveform A is a low resistance waveform B is a high
resistance waveform w flow reversal during early diastole and low flow in end
diastole
In this image, the red color indicated by the arrow represents: - ANSWERS-Flow
toward the ultrasound txd
4. What potential bioeffect occurs through absorption of sound energy by
tissue? - ANSWERS-Heating
Sound attenuation in tissue is primarily due to absorption (conversion of
ultrasound to heat).
,5. When practicing universal precautions, you should do all the following
EXCEPT: - ANSWERS-Wash gloves between exams for reuse from one patient to
another. (It is recommended that gloves be worn during every ultrasound
examination. They should be discarded after use).
-wear gloves when there is a potential for contract with patient body fluid
-change gloves when moving from one patient to another
-Wash hands immediately after gloves are removed
- Wear face masks or eye protection whenever there is a possibility of blood
splashing in your face
6. A nosocomial infection is defined as one that: - ANSWERS-Is hospital-acquired
7. Thermally induced biologic effects should be preventable by avoiding a local
tissue temperature increase exceeding: - ANSWERS-1°C
8. Which intensity descriptor has the lowest numeric value for the
characterization of a pulsed-wave ultrasonic field? - ANSWERS-SATA
SATA, a term that is infrequently used, means spatial average, time average.
Note: I(SPTA) is the spatial peak, time average intensity; I(SPTP) is the spatial
peak, temporal peak.
9* Increased tissue heating could occur when you: - ANSWERS-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 an: - ANSWERS-
Epidemiological study
Which of the following actions is NOT compliant w HIPPA? - ANSWERS-
Reviewing your neighbors medical studies on your hospital PACS system so you
can give her your opinion of her condition
The Health Insurance Portability and Accountability Act (HIPPA) includes rules to
protect the privacy of the individuals health information. This answer would
violate HIPPA
What does the mechanical index indicate on an ultrasound system? - ANSWERS-
The likelihood of cavitation during an ultrasound exam
Mechanical index is derived from the peak rarefaction pressure and the
ultrasound freq, parameters shown to be associated w onset of cavitation
In medicine, what do the initials PHI indicate? - ANSWERS-Protected health
information
14*What should you limit when the thermal index exceeds 1? - ANSWERS-
Exposure time
