Free Sonography Principles and Instrumentation Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Sonography Principles and Instrumentation practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1During a sonographic examination, the patient says that pain makes the planned position intolerable. What should the sonographer evaluate and document?

   1. A. Only whether the acquired images are technically adequate
   2. B. The patient's inability to tolerate the examination
   3. C. Only whether the appointment can be rescheduled
   4. D. The interpreting physician's final diagnosis

   Answer: B

   Explanation: The SDMS standard says to "Evaluates and documents any contraindications, insufficient patient preparation, and the patient’s inability or unwillingness to tolerate the examination or procedure." Pain that prevents the planned position is an inability to tolerate the examination, so it belongs in this assessment.

   Reference: Scope of Practice and Clinical Standards for the Diagnostic Medical Sonographer — Section 1, Standard 1.1.4, p. 3

2. 2For a point-of-care adult abdominal examination, which transducer types does the AIUM parameter prefer?

   1. A. Phased array or curvilinear transducers
   2. B. Only a nonimaging continuous-wave probe
   3. C. Only a transcranial Doppler probe
   4. D. Only an endocavitary volume probe

   Answer: A

   Explanation: The AIUM parameter states, "For abdominal studies, phased array or curvilinear transducers are preferred" while allowing a higher frequency linear probe when appropriate. The preferred choices answer the specified abdominal use.

   Reference: AIUM Practice Parameter for the Performance of Point-of-Care Ultrasound Examinations — Equipment Specifications, p. 846

3. 3Which pair of targets is separated by axial resolution in ultrasound?

   1. A. Two targets at different depths along the beam
   2. B. Two targets side by side across the beam
   3. C. Two targets separated only in the elevation plane
   4. D. Two events separated only in time

   Answer: A

   Explanation: GE defines axial resolution as the dimension "parallel to the direction of sound travel" for structures one in front of another. This is separation along the beam.

   Reference: US: Physics Revisited — Spatial Resolution, Axial Resolution, p. 9

4. 4For a spectral Doppler velocity measurement, how should the flow-direction cursor be oriented?

   1. A. Aligned with the direction of blood flow
   2. B. Perpendicular to the direction of blood flow
   3. C. Parallel to the screen's depth scale
   4. D. Fixed at the transducer-face angle

   Answer: A

   Explanation: Philips instructs that the flow-direction cursor "should be aligned to the blood flow direction when measuring the flow velocity." This sets the direction used for angle correction.

   Reference: InnoSight Diagnostic Ultrasound System User Manual — Spectral Doppler Mode Image Controls, Overview, p. 87

5. 5For an external ultrasound transducer used only on clean, intact skin, what level of disinfection is recommended between patients?

   1. A. Low-level disinfection after cleaning
   2. B. High-level disinfection after cleaning
   3. C. Sterilization after cleaning
   4. D. Cleaning alone without disinfection

   Answer: A

   Explanation: AIUM states that "Preparation of external transducers between patients requires a low-level disinfection (LLD) process." This applies to the intact-skin external examination; higher levels concern different contact categories, and cleaning alone omits disinfection.

   Reference: AIUM Guidelines for Cleaning and Preparing Ultrasound Transducers, 2025 Revision — Summary; Section I, Introduction

6. 6A patient's clinical status changes during an ultrasound examination. Which response matches the sonographer's patient care role?

   1. A. Continue the preset protocol without reconsidering it
   2. B. Delay all assessment until the final report is issued
   3. C. Adapt the protocol to the change in clinical status
   4. D. Treat the imaging protocol as fixed by the referral

   Answer: C

   Explanation: The standard instructs the sonographer to "Adapts the protocol according to images obtained or changes in the patient’s clinical status during the examination or procedure." The changed status therefore calls for an appropriate protocol adaptation.

   Reference: Scope of Practice and Clinical Standards for the Diagnostic Medical Sonographer — Section 1, Standard 1.4.4, p. 4

7. 7Which transducer type is preferred for point-of-care cardiac imaging in the AIUM parameter?

   1. A. A phased array transducer
   2. B. A nonimaging transcranial probe
   3. C. An endovaginal volume transducer
   4. D. A high-frequency superficial-only probe

   Answer: A

   Explanation: The AIUM parameter says, "For cardiac studies, phased array transducers are preferred." This selection fits the stated cardiac application.

   Reference: AIUM Practice Parameter for the Performance of Point-of-Care Ultrasound Examinations — Equipment Specifications, p. 846

8. 8When optimizing axial resolution, what change to the transmitted pulse length helps distinguish closely spaced reflectors along the beam?

   1. A. Use a shorter spatial pulse
   2. B. Use a longer spatial pulse
   3. C. Widen the lateral beam
   4. D. Increase image persistence

   Answer: A

   Explanation: GE explains that "Short pulses are produced and received in a wide bandwidth (or range of frequencies) increasing axial resolution." A shorter pulse reduces overlap of echoes from adjacent depths.

   Reference: US: Physics Revisited — Spatial Resolution, Axial Resolution, p. 9

9. 9According to the cited system manual, why is a correction angle greater than 70 degrees generally unsuitable for velocity calculation?

   1. A. Velocity calculation error is usually too large
   2. B. The sample gate always becomes too wide
   3. C. The beam always becomes continuous wave
   4. D. The color map always reverses direction

   Answer: A

   Explanation: The manual states, "At angles greater than 70°, the error in the velocity calculation is usually too large to use." The boundary concerns velocity accuracy in this system, not gate width or color assignment.

   Reference: InnoSight Diagnostic Ultrasound System User Manual — Spectral Doppler Mode Image Controls, Adjusting Correction Angle, p. 87

10. 10What preparation is recommended before reusing an internal transducer for another patient?

    1. A. Clean it and perform high-level disinfection
    2. B. Clean it and perform low-level disinfection
    3. C. Replace its cover without disinfecting it
    4. D. Wipe off gel and apply a new sterile cover

    Answer: A

    Explanation: AIUM specifies that "Disinfection of all internal transducers (e.g., transvaginal, transrectal, and transesophageal transducers), as well as intraoperative transducers, require HLD before they can be used on another patient." Cleaning precedes disinfection; a cover does not replace this step.

    Reference: AIUM Guidelines for Cleaning and Preparing Ultrasound Transducers, 2025 Revision — Section I, Ultrasound Transducer Cleaning and Preparation, 2.b