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  3. Medical: Cardiology

Kringelartefakte

English translation: wrap-around o. aliasing artifact

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
German term or phrase:Kringelartefakte
English translation:wrap-around o. aliasing artifact
Entered by: elizabeth_med

14:32 Dec 6, 2019
German to English translations [PRO]
Medical - Medical: Cardiology / imaging
German term or phrase: Kringelartefakte
"Zusätzlich im Zweikammerblick "Kringelartefakte" an der LV-Spitze."
elizabeth_med
France
Local time: 16:20
wrap-around o. aliasing artifact
Explanation:
perhaps, judging by the sound of it.

https://en.wikipedia.org/wiki/MRI_artifact
A wrap-around artifact also known as an aliasing artifact, is a result of mismapping of anatomy that lies outside the field of view but within the slice volume.[4] The selected field of view is smaller than the size of the imaged object. The anatomy is usually displaced to the opposite side of the image (Figs 6 and 7). It can be caused by non-linear gradients or by undersampling of the frequencies contained within the return signal.[1]

The sampling rate must be twice the maximal frequency that occurs in the object (Nyquist sampling limit). If not, the Fourier transform will assign very low values to the frequency signals greater than the Nyquist limit. These frequencies will then ‘wrap around’ to the opposite side of the image, masquerading as low-frequency signals.
Selected response from:

Cilian O'Tuama
Germany
Local time: 16:20
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4 KudoZ points were awarded for this answer



Summary of answers provided
2wrap-around o. aliasing artifact
Cilian O'Tuama


  

Answers


1 hr   confidence: Answerer confidence 2/5Answerer confidence 2/5
wrap-around o. aliasing artifact


Explanation:
perhaps, judging by the sound of it.

https://en.wikipedia.org/wiki/MRI_artifact
A wrap-around artifact also known as an aliasing artifact, is a result of mismapping of anatomy that lies outside the field of view but within the slice volume.[4] The selected field of view is smaller than the size of the imaged object. The anatomy is usually displaced to the opposite side of the image (Figs 6 and 7). It can be caused by non-linear gradients or by undersampling of the frequencies contained within the return signal.[1]

The sampling rate must be twice the maximal frequency that occurs in the object (Nyquist sampling limit). If not, the Fourier transform will assign very low values to the frequency signals greater than the Nyquist limit. These frequencies will then ‘wrap around’ to the opposite side of the image, masquerading as low-frequency signals.

Cilian O'Tuama
Germany
Local time: 16:20
Native speaker of: English
PRO pts in category: 78
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