What is the definition of artifact?

1a : a usually simple object (such as a tool or ornament) showing human workmanship or modification as distinguished from a natural object especially : an object remaining from a particular period caves containing prehistoric artifacts.

Can a person be an artifact?

If humans are the products of deliberate design, either humans are artifacts or (if we’re sufficiently uncomfortable with that classification) the definition of artifacts needs to be revisited/revised. If humans are not designed, we cannot be artifacts.

What is the purpose of your artifact?

During an archaeological dig, any man-made object that’s dug up is an artifact. These artifacts help us determine what civilization may have been like and help us paint a picture of their society.

What is artifact in the brain?

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.

What causes artifact on MRI?

Artifacts in magnetic resonance imaging (MRI) may be caused by the MR scanner hardware itself or by the interaction of the patient with the hardware [1]. Artifacts and foreign bodies within the patient’s body may be confused with a pathology or just reduce the quality of examinations.

What causes muscle artifacts?

Forehead, jaw, and eyelid muscle movements can cause artifacts by moving the electrodes. Movements in the surroundings produce disturbances by altering the ambient electrical fields. Moreover, the tongue and eyes have their own dipole electric charge. Therefore, their movement can get recorded by the electrodes.

What is flow artifact?

Flow artifacts are caused by flowing blood or fluids in the body. A liquid flowing through a slice can experience an RF pulse and then flow out of the slice by the time the signal is recorded. Picture the following example. We are using a spin-echo sequence to image a slice.

What does artifact mean on CT scan?

Physics-based artifacts result from the physical processes involved in the acquisition of CT data. Patient-based artifacts are caused by such factors as patient movement or the presence of metallic materials in or on the patient. Scanner-based artifacts result from imperfections in scanner function.

What are audio artifacts?

In sound and music production, sonic artifact, or simply artifact, refers to sonic material that is accidental or unwanted, resulting from the editing or manipulation of a sound.

What causes beam hardening artifact?

Beam hardening is the phenomenon that occurs when an x-ray beam comprised of polychromatic energies passes through an object, resulting in selective attenuation of lower energy photons. In CT, beam hardening from a very dense target (e.g. bone or iodinated contrast) may result in characteristic artifacts.