| dbo:abstract |
Ghosting is a visual artifact that occurs in magnetic resonance imaging(MRI) scans. These artifact are a consequence of environmental factors or the human body (such as blood flow, implants etc.). 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 2-D or 3-D Fourier image, a mild deviation from the actual phase and amplitude may occur. This incompatibility of parameters is the cause of ghosting. The reasons for ghosting could be physical factors such as temperature or humidity of the environment and movement caused by the patient or in the patient’s body.There are two types of movement that could result in ghosting: * Physical movement of the patient (i.e. the inability of the person to stay still when the scan is being taken). This kind of motion causes a blur in the phase-encoded direction of the image. * Periodic motion such as arterial pulsations, swallowing, breathing and peristalsis results in discrete and well-defined ghosts. These movements, when reflected over the anatomy may result in improper diagnosis of the disease and hence have to be identified and suppressed. (en) |
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dbc:Medical_imaging |
| rdfs:comment |
Ghosting is a visual artifact that occurs in magnetic resonance imaging(MRI) scans. These artifact are a consequence of environmental factors or the human body (such as blood flow, implants etc.). 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. These movements, when reflected over the anatomy may result in improper diagnosis of the disease and hence have to be identified and suppressed. (en) |
| rdfs:label |
Ghosting (medical imaging) (en) |
| owl:sameAs |
wikidata:Ghosting (medical imaging) https://global.dbpedia.org/id/2ePo6 |
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wikipedia-en:Ghosting_(medical_imaging)?oldid=1092119514&ns=0 |
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