Davies Ultrasound Physics Review
2025/2026 Exam Questions with 100%
Correct Answers | Latest Update
1. What action would be most in keeping w the ALARA principle while
performing a diagnostic ultrasound exam? - 🧠 ANSWER ✔✔Complete the
diagnostic scan in a timely fashion at the lowest output power that achieves
a quality image
Advocating use of the ALARA principle (as low as reasonably achievable)
prudently minimizes the risk of bio effects (even tho epidemiological studies
have revealed no known risk associated with the use of diagnostic
ultrasound).
2. 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 frequency will not increase exposure.
3. 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.
4. What potential bioeffect occurs through absorption of sound energy by
tissue? - 🧠 ANSWER ✔✔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: - 🧠 ANSWER ✔✔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: - 🧠 ANSWER ✔✔Is
hospital-acquired
7. Thermally induced biologic effects should be preventable by avoiding a
local tissue temperature increase exceeding: - 🧠 ANSWER ✔✔1°C
8. Which intensity descriptor has the lowest numeric value for the
characterization of a pulsed-wave ultrasonic field? - 🧠 ANSWER ✔✔SATA
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, 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: - 🧠 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
2025/2026 Exam Questions with 100%
Correct Answers | Latest Update
1. What action would be most in keeping w the ALARA principle while
performing a diagnostic ultrasound exam? - 🧠 ANSWER ✔✔Complete the
diagnostic scan in a timely fashion at the lowest output power that achieves
a quality image
Advocating use of the ALARA principle (as low as reasonably achievable)
prudently minimizes the risk of bio effects (even tho epidemiological studies
have revealed no known risk associated with the use of diagnostic
ultrasound).
2. 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 frequency will not increase exposure.
3. 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.
4. What potential bioeffect occurs through absorption of sound energy by
tissue? - 🧠 ANSWER ✔✔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: - 🧠 ANSWER ✔✔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: - 🧠 ANSWER ✔✔Is
hospital-acquired
7. Thermally induced biologic effects should be preventable by avoiding a
local tissue temperature increase exceeding: - 🧠 ANSWER ✔✔1°C
8. Which intensity descriptor has the lowest numeric value for the
characterization of a pulsed-wave ultrasonic field? - 🧠 ANSWER ✔✔SATA
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, 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: - 🧠 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
