DAVIS EDGE CARDIAC PART 1 EXAM
SCRIPT 2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS GRADED A+
⩥ ***During performance of an obstetric ultrasound exam, you adjust
the system parameters to improve the image. Which of the following
parameters would increase acoustic exposure? Answer: Increase transmit
power
The transmit power is the only control listed that will affect the exposure
of the patient to acoustic power. Gain, TGC and frame averaging
(persistence) do not affect sound transmission and therefore do not affect
exposure. Increasing freq will not increase exposure
⩥ ***To minimize the risk of biologic effects of ultrasound to the fetus,
which imaging mode tradeoff would be most applicable? Answer: Use
M-mode instead of pulsed wave doppler to measure the fetal heart rate.
Pulsed wave doppler increases the time average intensity compared to
M-mode
⩥ What potential bio effect occurs thru absorption of sound energy by
tissue? Answer: Heating
,Sound attenuation in tissue is primarily due to absorption (conversion of
ultrasound to heat)
⩥ When practicing universal precautions, you should do all the
following EXCEPT: Answer: Wash gloves between exams for reuse
from on
-wear gloves when there is a potential for contract w 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
⩥ A nosocomial infection is defined as one that: Answer: Is hospital
acquired
⩥ Thermally induced biologic effects should be preventable by avoiding
a local tissue temperature increase exceeding: Answer: 1°C
⩥ Which intensity descriptor has the lowest numeric value for the
characterization of a pulse wave ultrasonic field: Answer: SATA
,SATA, a term that is infreq used, means spatial average, time average.
Note: I(SPTA) is the spatial peak, time average intensity; I(SPTA) is the
spatial peak, temporal peak
⩥ ***Increased tissue heating could occur when you: Answer: 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:
Answer: Epidemiological study
⩥ Which of the following actions is NOT compliant w HIPPA? Answer:
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?
Answer: 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? Answer: Protected
health information
⩥ ***What should you limit when the thermal index exceeds 1?
Answer: Exposure time
⩥ ***To practice the ALARA principle, which of the following
techniques should you employ? Answer: Use the lowest transmit power
that allows adequate tissue visualization
Use a high gain and low transmit power
⩥ The thermal index indicates: Answer: Estimated temperature increase
in tissue
Temperature increase is calculated assuming certain values for the
absorption and thermal properties of tissues and taking into account
factors such as beam geometry, freq and power. Technically, it is the
ratio of the power being produced to the power needed for a 1° C
temperature increase if tissues have the assumed properties
⩥ ***The operator control most directly adjusts the intensity of the
transmitted pulse? Answer: Acoustic output (transmit) power
SCRIPT 2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS GRADED A+
⩥ ***During performance of an obstetric ultrasound exam, you adjust
the system parameters to improve the image. Which of the following
parameters would increase acoustic exposure? Answer: Increase transmit
power
The transmit power is the only control listed that will affect the exposure
of the patient to acoustic power. Gain, TGC and frame averaging
(persistence) do not affect sound transmission and therefore do not affect
exposure. Increasing freq will not increase exposure
⩥ ***To minimize the risk of biologic effects of ultrasound to the fetus,
which imaging mode tradeoff would be most applicable? Answer: Use
M-mode instead of pulsed wave doppler to measure the fetal heart rate.
Pulsed wave doppler increases the time average intensity compared to
M-mode
⩥ What potential bio effect occurs thru absorption of sound energy by
tissue? Answer: Heating
,Sound attenuation in tissue is primarily due to absorption (conversion of
ultrasound to heat)
⩥ When practicing universal precautions, you should do all the
following EXCEPT: Answer: Wash gloves between exams for reuse
from on
-wear gloves when there is a potential for contract w 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
⩥ A nosocomial infection is defined as one that: Answer: Is hospital
acquired
⩥ Thermally induced biologic effects should be preventable by avoiding
a local tissue temperature increase exceeding: Answer: 1°C
⩥ Which intensity descriptor has the lowest numeric value for the
characterization of a pulse wave ultrasonic field: Answer: SATA
,SATA, a term that is infreq used, means spatial average, time average.
Note: I(SPTA) is the spatial peak, time average intensity; I(SPTA) is the
spatial peak, temporal peak
⩥ ***Increased tissue heating could occur when you: Answer: 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:
Answer: Epidemiological study
⩥ Which of the following actions is NOT compliant w HIPPA? Answer:
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?
Answer: 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? Answer: Protected
health information
⩥ ***What should you limit when the thermal index exceeds 1?
Answer: Exposure time
⩥ ***To practice the ALARA principle, which of the following
techniques should you employ? Answer: Use the lowest transmit power
that allows adequate tissue visualization
Use a high gain and low transmit power
⩥ The thermal index indicates: Answer: Estimated temperature increase
in tissue
Temperature increase is calculated assuming certain values for the
absorption and thermal properties of tissues and taking into account
factors such as beam geometry, freq and power. Technically, it is the
ratio of the power being produced to the power needed for a 1° C
temperature increase if tissues have the assumed properties
⩥ ***The operator control most directly adjusts the intensity of the
transmitted pulse? Answer: Acoustic output (transmit) power
