![]() Overall, some ultrasound artifacts may be avoidable with proper scanning techniques along with the knowledge that other artifacts are generated by the physical properties of the ultrasonic waves and the tissue through which those waves pass. A mismatch in the speed of the sound waves through the edges of a fluid filled structure exhibit narrow, hypoechoic shadow lines extending a distance from the lateral edges of that fluid filled structure. Occurs when ultrasonic wave encounter a fluid filled structure (gallbladder, cyst). Useful in the exam in that if there are comet tails visible there cannot be a pneumothorax (air within the pleural space hinders the sound waves preventing the comet tails). Each subsequent reflection isĬomet tails, “search lights” or “B-lines” are present when there is an increase fluid or consolidation in lung fields during the ultrasound lung exam. Ladder like or venetian blind like echo return. These two highly reflective surfaces and bounce back and forth producing a Surfaces (viceral parietal plural interface). Reverberation artifact this occurs when there are two highly reflective Most often occurs in the RUQ where you will see a mirror image of the liver on the far side of the diaphragm. The ultrasonic waves pass through this surface and then are reflected back to that surface producing a mirror image of the structure that is nearest to the probe…on the far side of that reflective surface. Occurs when there is a highly reflective surface (think diaphragm). When an ultrasound wave travels through a structure with low resistance (think fluid filled) the tissue at the far side of the structure appears brighter than the tissue beside it. Appear as multiple duplicated images of these surfaces. Ultrasound waves reflect back multiple times after hitting a highly reflective surfaces. Reflective structure(s) cause posterior shadowing behind the structure(s).Ī weaker signal (shadow) returns from behind a strong reflector (air) or sound absorbing structures like gallstones, kidney stones or bone. ![]() Helpful when trying to understand an image. Problematic in image interpretation and some that will be utilized as being The returning echoesĪre created into an image on the ultrasound monitor.Īrtifacts that the ultra-sonographer will likely encounter that could be It is said that 99% of the time the probe is in the “listening” modeĪnd this is occurring several million times per second. Out” mode to the “listening” mode and waits for the returning ultrasoundĮchoes. Is generated and travels through tissue, the probe switches from the “sending Some sound waves are absorbed by the material (tissue) it meets, some are reflected, some scattered and others refracted. ABSORPTION, REFLECTION, SCATTERING AND REFRACTION: It is about utilizing some elementary understanding of what the ultrasonic waves create when passing through different tissues in the body and what and how those waves are processed and reflected as images on the screen of your machine. Propagation or image processing of the ultrasound wave (comet tails, ring downĪ good understanding of the physics of ultrasound would be ideal but that is not what this blog is about. Penetration of sound waves through tissue and the image processing by theĪrtifacts are diagnostic themselves despite it being an error in the Result of the basic physical properties of the ultrasound beam, the spread and It could be an image that is not properly visualized thus creating a falseĪrtifacts can be the result of improper scanning technique and some are the Or it could be an image that appears that hides the real anatomy. It could be something that appears that is not really thereĪnatomically. The artifact is a false image of theĪnatomy. Artifacts are simply an error in imaging.
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