Artifacts

English translation: image misrepresentation

16:46 Jan 18, 2021
English language (monolingual) [PRO]
Medical - Medical: Instruments / MRI (Magnetic Resonance Imaging)
English term or phrase: Artifacts
Context: Instruction in the User Manual.

Instructions for use
Correct data acquisition is of crucial importance for a correct analysis.
Image artifacts can influence contour detection.
Make sure acquisitions are made by experts in cardiac MR and are performed according to the guidelines

What are "artifacts" as in above?

Thank you so much!
Anthony Indra
United States
Local time: 19:30
Selected answer:image misrepresentation
Explanation:
In signal processing in general, artifacts or artefacts are errors caused by the equipment or methodology used to process the signal.

In the context of MRI, it's any type of misrepresentation, caused by any source (including the patient, the signal processing, or the hardware, etc.), within the image that is not present within the original.
Selected response from:

Masoud Jamshidiha
Iran
Local time: 06:00
Grading comment
Thank you
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +1image defects
philgoddard
4 +1image misrepresentation
Masoud Jamshidiha
Summary of reference entries provided
MRI meaning
Yvonne Gallagher

  

Answers


7 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
artifacts
image defects


Explanation:
A defect in an image (such as a digital photograph) that appears as a result of the technology and methods used to create and process the image

… can produce a very good picture, but there will be some loss of detail and some color artifacts such as adjacent colors bleeding into each other.
— Consumer Reports
http://www.merriam-webster.com/dictionary/artifact

I do think you could have looked this up yourself.

philgoddard
United States
Native speaker of: English
PRO pts in category: 4
Notes to answerer
Asker: Thank you


Peer comments on this answer (and responses from the answerer)
agree  MPGS: :-)
40 mins

neutral  Yvonne Gallagher: "defect" is too simplistic. This is about MRI
21 hrs
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1 hr   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
artifacts
image misrepresentation


Explanation:
In signal processing in general, artifacts or artefacts are errors caused by the equipment or methodology used to process the signal.

In the context of MRI, it's any type of misrepresentation, caused by any source (including the patient, the signal processing, or the hardware, etc.), within the image that is not present within the original.



    Reference: http://en.wikipedia.org/wiki/Artifact_(error)
    Reference: http://en.wikipedia.org/wiki/MRI_artifact
Masoud Jamshidiha
Iran
Local time: 06:00
Native speaker of: Native in Persian (Farsi)Persian (Farsi)
PRO pts in category: 4
Grading comment
Thank you

Peer comments on this answer (and responses from the answerer)
agree  Tina Vonhof (X): Or inaccuracies, distortions.
22 hrs
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Reference comments


21 hrs
Reference: MRI meaning

Reference information:
https://radiopaedia.org/articles/radiological-image-artifact

Most artifacts in radiology refer to something seen on an image that are not present in reality but appear due to a quirk of the modality itself. Artifact is also used to describe findings that are due to things outside the patient that may obscure or distort the image, e.g. clothing, external cardiac monitor leads, body parts of carer, etc.

The commonest artifact seen in radiology is image noise, which is inherent to every modality and technique, and can be mitigated but never eliminated.

As an interpreter of imaging it is important to be aware of the main artifacts of the examination being reviewed to avoid issuing an erroneous report. However at times artifacts are welcome because they may be advantageous to the interpreter, making anatomy/pathology easier to appreciate, e.g. posterior acoustic shadowing of gallstones on ultrasound or susceptibility artifact of haemosiderin on MRI....


(takes 2 secs to find)

Yvonne Gallagher
Ireland
Native speaker of: Native in EnglishEnglish
PRO pts in category: 24
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