EACVI/AEPC Congenital Heart Disease Echocardiography
Practice Examination 2026–2027 | 190 Questions & Answers
| Professional Echo CHD Certification Exam Prep,
Congenital Heart Disease Echocardiography Study Guide,
Detailed Rationales, Comprehensive Practice Test, Cardiac
Imaging Review & Certification Preparation
Question 1
Which phenomenon describes the interaction of ultrasound with small blood cells that
produces echoes returning to the transducer from multiple directions?
A. Specular reflection
B. Backscatter
C. Refraction
D. Attenuation
Correct Answer: B
Explanation: Backscatter occurs when ultrasound encounters small, irregular
interfaces comparable to wavelength, such as red blood cells, producing echoes
scattered in multiple directions. Specular reflection occurs at large, smooth interfaces
like valve surfaces.
Question 2
A sonographer increases the transmitted ultrasound frequency from 3 MHz to 7 MHz for
a pediatric cardiac examination. What is the primary effect of this change?
,A. Increased tissue penetration with improved resolution
B. Decreased tissue penetration with improved axial resolution
C. Increased tissue penetration with decreased axial resolution
D. No change in penetration with improved temporal resolution
Correct Answer: B
Explanation: Higher frequencies provide better axial resolution but suffer greater
attenuation and reduced penetration. This trade-off is fundamental in pediatric imaging
where higher frequencies are feasible due to smaller body size.
Question 3
In an adult patient with a difficult acoustic window, the sonographer reduces the sector
width from 90° to 45°. What is the primary benefit of this adjustment?
A. Increased penetration depth
B. Improved lateral resolution
C. Increased frame rate
D. Decreased aliasing in color Doppler
Correct Answer: C
Explanation: Reducing sector width decreases the number of scan lines per frame,
increasing frame rate. This improves temporal resolution without affecting penetration
or axial resolution. Frame rate is proportional to lines per frame and inversely related to
sector width.
Question 4
What is the primary effect of increasing packet size in color Doppler imaging?
,A. Improved frame rate
B. Improved velocity accuracy
C. Reduced aliasing
D. Increased penetration
Correct Answer: B
Explanation: Larger packet size increases the number of pulses per scan line,
improving velocity estimation accuracy but reducing frame rate. This trade-off must be
balanced against temporal resolution requirements.
Question 5
Which Doppler modality is most appropriate for measuring a very high-velocity jet in
aortic stenosis?
A. Pulsed wave Doppler
B. Continuous wave Doppler
C. Color flow Doppler
D. Tissue Doppler imaging
Correct Answer: B
Explanation: Continuous wave Doppler has no Nyquist limit and can measure unlimited
velocities, making it ideal for high-velocity stenotic jets. Pulsed wave Doppler aliases at
high velocities.
Question 6
, A 5-year-old child has a heart rate of 120 bpm. What is the maximum velocity that can be
accurately measured by pulsed wave Doppler with a 5 MHz transducer at a depth of 8
cm?
A. 1.0 m/s
B. 1.5 m/s
C. 2.0 m/s
D. 3.0 m/s
Correct Answer: B
Explanation: The Nyquist limit equals PRF/2. At 8 cm depth with 5 MHz, PRF is
approximately 9.6 kHz, giving Nyquist of 4.8 kHz or approximately 1.5 m/s. Velocities
above this will alias.
Question 7
Which artifact is characterized by echoes appearing at multiples of the true depth?
A. Grating lobe
B. Reverberation
C. Side lobe
D. Mirror image
Correct Answer: B
Explanation: Reverberation artifacts occur when ultrasound reflects back and forth
between two strong reflectors, creating false echoes at multiples of the true depth.
These are common at the interface of strong reflectors like prosthetic materials.
Question 8
Practice Examination 2026–2027 | 190 Questions & Answers
| Professional Echo CHD Certification Exam Prep,
Congenital Heart Disease Echocardiography Study Guide,
Detailed Rationales, Comprehensive Practice Test, Cardiac
Imaging Review & Certification Preparation
Question 1
Which phenomenon describes the interaction of ultrasound with small blood cells that
produces echoes returning to the transducer from multiple directions?
A. Specular reflection
B. Backscatter
C. Refraction
D. Attenuation
Correct Answer: B
Explanation: Backscatter occurs when ultrasound encounters small, irregular
interfaces comparable to wavelength, such as red blood cells, producing echoes
scattered in multiple directions. Specular reflection occurs at large, smooth interfaces
like valve surfaces.
Question 2
A sonographer increases the transmitted ultrasound frequency from 3 MHz to 7 MHz for
a pediatric cardiac examination. What is the primary effect of this change?
,A. Increased tissue penetration with improved resolution
B. Decreased tissue penetration with improved axial resolution
C. Increased tissue penetration with decreased axial resolution
D. No change in penetration with improved temporal resolution
Correct Answer: B
Explanation: Higher frequencies provide better axial resolution but suffer greater
attenuation and reduced penetration. This trade-off is fundamental in pediatric imaging
where higher frequencies are feasible due to smaller body size.
Question 3
In an adult patient with a difficult acoustic window, the sonographer reduces the sector
width from 90° to 45°. What is the primary benefit of this adjustment?
A. Increased penetration depth
B. Improved lateral resolution
C. Increased frame rate
D. Decreased aliasing in color Doppler
Correct Answer: C
Explanation: Reducing sector width decreases the number of scan lines per frame,
increasing frame rate. This improves temporal resolution without affecting penetration
or axial resolution. Frame rate is proportional to lines per frame and inversely related to
sector width.
Question 4
What is the primary effect of increasing packet size in color Doppler imaging?
,A. Improved frame rate
B. Improved velocity accuracy
C. Reduced aliasing
D. Increased penetration
Correct Answer: B
Explanation: Larger packet size increases the number of pulses per scan line,
improving velocity estimation accuracy but reducing frame rate. This trade-off must be
balanced against temporal resolution requirements.
Question 5
Which Doppler modality is most appropriate for measuring a very high-velocity jet in
aortic stenosis?
A. Pulsed wave Doppler
B. Continuous wave Doppler
C. Color flow Doppler
D. Tissue Doppler imaging
Correct Answer: B
Explanation: Continuous wave Doppler has no Nyquist limit and can measure unlimited
velocities, making it ideal for high-velocity stenotic jets. Pulsed wave Doppler aliases at
high velocities.
Question 6
, A 5-year-old child has a heart rate of 120 bpm. What is the maximum velocity that can be
accurately measured by pulsed wave Doppler with a 5 MHz transducer at a depth of 8
cm?
A. 1.0 m/s
B. 1.5 m/s
C. 2.0 m/s
D. 3.0 m/s
Correct Answer: B
Explanation: The Nyquist limit equals PRF/2. At 8 cm depth with 5 MHz, PRF is
approximately 9.6 kHz, giving Nyquist of 4.8 kHz or approximately 1.5 m/s. Velocities
above this will alias.
Question 7
Which artifact is characterized by echoes appearing at multiples of the true depth?
A. Grating lobe
B. Reverberation
C. Side lobe
D. Mirror image
Correct Answer: B
Explanation: Reverberation artifacts occur when ultrasound reflects back and forth
between two strong reflectors, creating false echoes at multiples of the true depth.
These are common at the interface of strong reflectors like prosthetic materials.
Question 8
