Visual artifact

In light microscopy, artifacts may be produced by air bubbles trapped under the slide's cover slip.

Different techniques including freeze-fracturing and cell fractionation may be used to overcome the problems of artifacts.

[1] A crush artifact is an artificial elongation and distortion seen in histopathology and cytopathology studies, presumably because of iatrogenic compression of tissues.

[4] In projectional radiography, visual artifacts that can constitute disease mimics include jewelry, clothes and skin folds.

[7] In Magnetic resonance imaging, artifacts can be classified as patient-related, signal processing-dependent or hardware (machine)-related.

A screenshot of a Microsoft Windows XP application displaying a visual artifact with repeated frames
A retinography . The gray spot in the center is a shadow artifact.
Circular artifacts caused by backscatter from raindrops
Confocal laser scanning fluorescence micrograph of thale cress anther (part of stamen ). The picture shows among other things a nice red flowing collar-like structure just below the anther. However, an intact thale cress stamen does not have such collar, this is a fixation artifact: the stamen has been cut below the picture frame, and epidermis (upper layer of cells) of stamen stalk has peeled off, forming a non-characteristic structure. Photo: Heiti Paves from Tallinn University of Technology .