Acoustic noise concerns in functional magnetic resonance imaging

Moelker, Adriaan; Pattynama, Peter M. T.

doi:10.1002/hbm.10134

Cited by 89 publications

(75 citation statements)

References 131 publications

(354 reference statements)

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“…The educational orientation of the research, and the potential influence of a stressful environment upon creativity [44], made it advisable to check that the rated creativity of outcomes from the chosen task was not severely influenced by the unusual conditions associated with being scanned. Concerns have been raised that the perception and processing of stimuli can be influenced by the distractions of the scanning environment [30].…”

Section: Experiments 1: Effect Of the Environment On Creativitymentioning

confidence: 99%

Semantic divergence and creative story generation: An fMRI investigation

Howard-Jones

Blakemore

Samuel

et al. 2005

Cognitive Brain Research

223

151

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Section: Experiments 1: Effect Of the Environment On Creativitymentioning

confidence: 99%

Semantic divergence and creative story generation: An fMRI investigation

Howard-Jones

Blakemore

Samuel

et al. 2005

Cognitive Brain Research

223

151

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“…However, customary functional magnetic resonance imaging (fMRI) is hampered by acoustic noise produced during operation of the MR system, which affects the experimental integrity of auditory fMRI studies [Amaro et al, 2002;Haller et al, 2005;McJury and Shellock, 2000;Moelker and Pattynama, 2003]. In particuConny Schmidt and Tino Zaehle equally contributed to this work.…”

Section: Introductionmentioning

confidence: 98%

Silent and continuous fMRI scanning differentially modulate activation in an auditory language comprehension task

Schmidt

Zaehle

Meyer

et al. 2007

Human Brain Mapping

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Sparse temporal acquisition schemes have been adopted to investigate the neural correlates of human audition using blood-oxygen-level dependent (BOLD) based functional magnetic resonance imaging (fMRI) devoid of ambient confounding acoustic scanner noise. These schemes have previously been extended to clustered-sparse temporal acquisition designs which record several subsequent BOLD contrast images in rapid succession in order to enhance temporal sampling efficiency. In the present study we demonstrate that an event-related task design can effectively be combined with a clustered temporal acquisition technique in an auditory language comprehension task. The same fifteen volunteers performed two separate auditory runs which either applied customary fMRI acquisition (CA) composed of continuous scanner noise or "silent" fMRI built on a clustered temporal acquisition (CTA) protocol. In accord with our hypothesis, the CTA scheme relative to the CA protocol is accompanied by significantly stronger functional responses along the entire superior temporal plane. By contrast, the bilateral insulae engage more strongly during continuous scanning. A post-hoc region-of-interest analysis reveals cortical activation in subportions of the supratemporal plane which varies as a function of acquisition protocol. The middle part of the supratemporal plane shows a rightward asymmetry only for the CTA scheme while the posterior supratemporal plane exposes a significantly stronger leftward asymmetry during the CTA. Our findings implicate that silent fMRI is advantageous when it comes to the exploration of auditory and speech functions residing in the supratemporal plane.

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“…Indeed, it is known that acoustic scanner noise can indirectly confound fMRI results even in experiments within the visual modality. The scanning-related noise during continuous fMRI may distract subjects and require them to enhance their mental effort to handle the experimental demands [Mazard et al, 2002;Moelker and Pattynama, 2003]. This effect is likely to increase with task difficulty .…”

Section: Introductionmentioning

confidence: 99%

Sparse imaging and continuous event‐related fMRI in the visual domain: A systematic comparison

Nebel

Stude

Wiese

et al. 2004

Human Brain Mapping

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Continuous image acquisition as used in most functional magnetic resonance imaging (fMRI) designs may conflict with specific experimental settings due to attendant, noisy gradient switching. In sparse fMRI, single images are recorded with a delay that allows the registration of the predicted peak of an evoked hemodynamic response (HDR). The aim of this study was to assess validity and sensitivity of single-trial sparse imaging within the visual domain. Thirteen subjects were scanned twice. Either continuous or sparse image acquisition was applied while participants viewed single trains of flashlights. Sparse fMRI results were compared to continuous event-related fMRI results on single- and multisubject level regarding spatial extent, overlap, and intensity of activation. In continuously recorded data, the variability of the HDR peak latency was examined because this measure determined the timing of sparse image acquisition. In sparse fMRI, the sensitivity was analyzed considering different numbers of averaged trials. Sparse imaging detected the core activity revealed using continuous fMRI. The intensity of signal changes detected by continuous or sparse fMRI was comparable. The HDR peak latency was stable across sessions, but intersubject and regional variability might have affected the power of sparse fMRI. In sparse imaging, adding trials resulted in extension of activation and improvement in statistical power. The comparison with established continuous fMRI confirms the validity of sparse imaging. Conventional event-related data acquisition and analysis provided more comprehensive results. However, only sparse fMRI offers the opportunity to apply stimuli and record further biosignals free of scanner-related artifacts during intervals without image acquisition.

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Acoustic noise concerns in functional magnetic resonance imaging

Cited by 89 publications

References 131 publications

Semantic divergence and creative story generation: An fMRI investigation

Semantic divergence and creative story generation: An fMRI investigation

Silent and continuous fMRI scanning differentially modulate activation in an auditory language comprehension task

Sparse imaging and continuous event‐related fMRI in the visual domain: A systematic comparison

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