Characterization of Noise Produced During Continuous and Sparse Sampling Functional Magnetic Resonance Imaging

Auteurs-es

  • Olivier Robin Centre de Recherche Acoustique-Signal-Humain, Université de Sherbrooke, CA
  • Félix Le Moigne-Le Dem Centre de Recherche Acoustique-Signal-Humain, Université de Sherbrooke,
  • Pascal Tétreault Départementsd’anesthésiologie et médecine nucléaire et radiobiologie, Faculté de Médecine etdes Sciences de la Santé, Université de Sherbrooke, CA
  • Domnique Lorrain Départements de psychologie, Faculté de Lettres et Science Humaine, Université de Sherbrooke,
  • Vivien Staehle Phonoptics, FR

Résumé

Noise is generated during magnetic resonance imaging (MRI) and comes from the gradient magnetic field (Lorentz forces acting on the gradient coils) and radiofrequency pulses used to generate sequences for scanning. Characterizing this noise is complicated by the fact that sensors without any metal parts must be used, given the intense magnetic fields present in MRI. Also, the typical continuous acquisition scheme that generates continuous noise is hardly compatible with auditory-related experiments. To avoid noise during stimulus presentation, sparse samplingfunctional MRI has been suggested and involve theacquisition of imaging volumes interspersed with silent periods (i.e. no acquisition periods).This communication describes the use of optical fiber microphones to characterize the noise produced during continuous and sparse sampling functional magnetic resonance imaging sequences. The whole instrumentation chain is described, along with the results obtained in terms of overall sound pressure level and time-frequency content.

Fichiers supplémentaires

Publié-e

2023-10-09

Comment citer

1.
Robin O, Le Moigne-Le Dem F, Tétreault P, Lorrain D, Staehle V. Characterization of Noise Produced During Continuous and Sparse Sampling Functional Magnetic Resonance Imaging. Canadian Acoustics [Internet]. 9 oct. 2023 [cité 30 mai 2024];51(3):82-3. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/4081

Numéro

Vol. 51 No. 3 (2023): Actes de la conférence Semaine canadienne de l'acoustique 2023

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

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