inconspicuous hypersignal edgings
French translation: bordures ou marges d'hypersignaux discrets
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| 16:47 May 20, 2021 |
| English to French translations [PRO] Medical - Medical: Instruments / Raisonance magnétique / | |||||||
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|  Selected response from: Drmanu49 France Local time: 09:20 | ||||||
Grading comment
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| 4 +1 | bordures ou marges d'hypersignaux discrets |
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| Artéfact métallique |
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Answers
2 hrs confidence: 
peer agreement (net): +1
peer agreement (net): +1bordures ou marges d'hypersignaux discrets Explanation: Artéfacts | Manualzz https://manualzz.com › doc › artéfacts Toutefois, des hypersignaux discrets sont souvent visibles dans le bras postérieur des capsules internes, le long des faisceaux cortico-spinaux, et au niveau de ... |
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Reference comments
2 hrs |
| Reference: Artéfact métallique Reference information: Diapo 9 Artéfact métallique Il se présente sous la forme d’un vide de signal, entouré d’un arc en hypersignal http://www.sfrnet.org/Data/upload/files/ARTEFACTS en IRM_10 ... Black boundary artifact, also known as India ink artifact or ***type 2 chemical shift artifact***... This artifact occurs in gradient echo (GE) sequences as a result of selecting an echo time (TE) in which the fat and water spins (located in the same voxel at an interface) are out of phase, cancelling each other. At 1.5 T, the 3.5 ppm difference in frequency between water and saturated fat results in cancellation of spins at 4.5 ms multiples, starting at about 2.3 ms; for example at 6.8 ms, 11.3 ms, and 15.9 ms. This artifact does not occur with spin echo (SE) sequences as the spins are rephased by the 180o refocusing gradient. https://radiopaedia.org/articles/black-boundary-artifact?lan... |
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