Ultrasound Artifacts – Part 1

Bönhof, J. A.

doi:10.1055/s-0041-107766

Cited by 7 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Doppler signal strength of the blood stream can be displayed using so-called "power Doppler" or "color Doppler energy" [11,16].…”

Section: Color Doppler Imaging Definitionmentioning

confidence: 99%

“…Reduced depth penetration or low resolution in the near filed may be improved by changes of the transducer frequency, persistence and other maneuvers. Attenuation of sound propagation is per se also an artefact as it can be compensed for by depth gain adjustment [11,16].…”

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

“…Several important assumptions occur within the ultrasound machine processing including; a straight line of a constant sound propagation speed of 1540 m/s without any interactions or deviation in both directions, a valid assumption only before and after reflection; that image reconstruction time is continuous and negligible (without any interruptions); that sound attenuation is equal at every image depth over the entire ultrasound image; that a one-dimensional sound lobe line with a defined and limited length has no other dimension (no thickness or width); and that echo amplitude and intensity (strength) depend only upon the anatomical structures from which they are reflected (back scatter). Artefacts caused by the assumptions and discrepancies of the true dimensions of sound lobes are called slice-thickness artefacts, e.g., in the case of width bow artefacts [11,16].…”

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

“…In the case of very small and strong echogenic structures (e.g., air, metal, calcifications or cholesterol particles) reverberation results in comet-tail or ring down artefacts depending on the size of the particle [17]. Ring down artefacts are explained by resonance ("vibration" with signal extension) due to fluid between gas bubbles, metal and other structures [11,16].…”

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

See 3 more Smart Citations

Lung artefacts and their use

Dietrich

Mathis²,

Blaivas

et al. 2016

Med Ultrason

View full text Add to dashboard Cite

IntroductionIn years gone by examination of patients with pulmonary disorders rested essentially on a clinician's bedside physical examination, of auscultation and percussion, complimented with blood gas analysis and X-ray imaging. Lung ultrasound has emerged into this context as a real-time bedside procedure, delivering information relevant to the clinician's differential diagnosis. A large part of sonographic lung examination involves the interpretation of artefacts, thus knowledge of the origin of typical artefacts is important. Although indirect sonographic signs, nonetheless reliable conclusions on the condition of the lung can be inferred. Particularly the of quantity and distribution of B-lines can establish important assessment of the cause and degree of fluid load within the interstitium.All focused ultrasound investigations, including bedside lung ultrasound, allow symptom evaluation considering multiple organ-systems yet with minimal time delay. Such integration of imaging with clinical assessment and treatment is called Point-of-Care Ultrasound (POCUS) and should be understood as an extension of the physical examination. POCUS offers a unique but crucial role, integrating clinical and other imaging findings, including cardiac ultrasound (echocardiography), chest radiography, and computed tomography (CT) scans is crucial, which alone may lack the required accuracy.The emergence of differences in approach to lung sonography, technique and nomenclature, provided the AbstractThe science of lung ultrasound has grown tremendously over the last two decades and lung ultrasound has not only entered the mainstream of point of care ultrasound but has become a dominant topic. Understanding lung ultrasound signs and artifacts is critical to being able to correlate findings with actual pathology and normal anatomy and physiology. Investigators have described multiple lung ultrasound artifacts and findings and it is important to understand both the physics and anatomic basis behind them. Additionally, ultrasound machine use and transducer selection can significantly affect results obtained on patient during an examination and the provider must carefully choose the correct settings. This manuscript describes the state of the art in ultrasound artifact recognition and correlation as well as management of ultrasound technology to optimize diagnostic success.Keywords: ultrasound, lung, artifacts, pathology, guidelines [2,[11][12][13][14][15] we discuss the prominent role of the particular artefacts of lung sonography answering differential-diagnostic questions in patients with cardio-pulmonary diseases. Lung artefacts

show abstract

“…The Doppler signal strength of the blood stream can be displayed using so-called "power Doppler" or "color Doppler energy" [11,16].…”

Section: Color Doppler Imaging Definitionmentioning

confidence: 99%

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

Section: Introduction Into Artefacts B-mode Ultrasound (Grey Scale) Dmentioning

confidence: 99%

See 2 more Smart Citations

Lung artefacts and their use

Dietrich

Mathis²,

Blaivas

et al. 2016

Med Ultrason

View full text Add to dashboard Cite

show abstract

“…The ultrasound beam reverberates back and forth between the reflectors. Since it takes the sound waves longer to return to the transducer, the sound waves returning from the reverberation are interpreted as deeper situated structures …”

mentioning

confidence: 99%

Economical Sponge Phantom for Teaching, Understanding, and Researching A‐ and B‐Line Reverberation Artifacts in Lung Ultrasound

Blüthgen

Sanabria

Frauenfelder

et al. 2017

J of Ultrasound Medicine

View full text Add to dashboard Cite

This project evaluated a low-cost sponge phantom setup for its capability to teach and study A- and B-line reverberation artifacts known from lung ultrasound and to numerically simulate sound wave interaction with the phantom using a finite-difference time-domain (FDTD) model. Both A- and B-line artifacts were reproducible on B-mode ultrasound imaging as well as in the FDTD-based simulation. The phantom was found to be an easy-to-set up and economical tool for understanding, teaching, and researching A- and B-line artifacts occurring in lung ultrasound. The FDTD method-based simulation was able to reproduce the artifacts and provides intuitive insight into the underlying physics.

show abstract

Artifacts in Sonography – Part 3

Bönhof¹,

McLaughlin

2018

Ultraschall in Med

View full text Add to dashboard Cite

As a continuation of parts 1 1 and 2 2, this article discusses artifacts as caused by insufficient temporal resolution, artifacts in color and spectral Doppler sonography, and information regarding artifacts in sonography with contrast agents. There are artifacts that occur in B-mode sonography as well as in Doppler imaging methods and sonography with contrast agents, such as slice thickness artifacts and bow artifacts, shadows, mirroring, and artifacts due to refraction that appear, for example, as double images, because they are based on the same formation mechanisms. In addition, there are artifacts specific to Doppler sonography, such as the twinkling artifact, and method-based motion artifacts, such as aliasing, the ureteric jet, and due to tissue vibration. The artifacts specific to contrast mode include echoes from usually highly reflective structures that are not contrast bubbles ("leakage"). Contrast agent can also change the transmitting signal so that even structures not containing contrast agent are echogenic ("pseudoenhancement"). While artifacts can cause problems regarding differential diagnosis, they can also be useful for determining the diagnosis. Therefore, effective use of sonography requires both profound knowledge and skilled interpretation of artifacts.

show abstract

Ultrasound Artifacts – Part 1

Cited by 7 publications

References 16 publications

Lung artefacts and their use

Lung artefacts and their use

Economical Sponge Phantom for Teaching, Understanding, and Researching A‐ and B‐Line Reverberation Artifacts in Lung Ultrasound

Artifacts in Sonography – Part 3

Contact Info

Product

Resources

About