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An MRI artifact is a visual artifact (an anomaly seen during visual representation) in magnetic resonance imaging (MRI). It is a feature appearing in an image that is not present in the original object. [1] Many different artifacts can occur during MRI, some affecting the diagnostic quality, while others may be confused with pathology.
Sonic artifact, in sound and music production, sonic material that is accidental or unwanted, resulting from the editing of another sound. Visual artifact, in imaging, any unwanted visual alteration introduced by the imaging equipment. Compression artifact, in computer graphics, distortion of media by the data compression.
Artifacts are structures or features in tissue that interfere with normal histological examination. Artifacts interfere with histology by changing the tissues appearance and hiding structures. Tissue processing artifacts can include pigments formed by fixatives, [ 12 ] shrinkage, washing out of cellular components, color changes in different ...
Artifact Creek, a stream in British Columbia, Canada; Artifact Ridge, a mountain ridge in British Columbia, Canada; Artifacting, a technique used on some older computers to generate color in monochrome modes by exploiting artifacts of analog television systems; Learning artifact (education), an object created by students during the course of ...
Ghosting is a multidimensional artifact that occurs in the MRI in the phase-encoded direction (short axis of the image) after applying the Fourier transform. When the phase of the magnetic resonance signal is being encoded into the 2D or 3D Fourier image, a mild deviation from the actual phase and amplitude may occur.
Second, medical roots generally go together according to language, i.e., Greek prefixes occur with Greek suffixes and Latin prefixes with Latin suffixes. Although international scientific vocabulary is not stringent about segregating combining forms of different languages, it is advisable when coining new words not to mix different lingual roots.
Even the most careful fixation does alter the sample and introduce artifacts that can interfere with interpretation of cellular ultrastructure. A prominent example is the bacterial mesosome , which was thought to be an organelle in gram-positive bacteria in the 1970s, but was later shown by new techniques developed for electron microscopy to be ...
Compression artifact, freezing artifact, cautery artifact, tissue folds, crush artifact from forceps, relaxing incision artifact, cartilage dropping out, fat compression, poor staining, dropping of tumor, etc. [6]: 149–62 These can be introduced as the tumor is "flattened". Stain can run from the surgical edge, and stain the surgical margin ...