Apr 9, 2019

Active head motion reduction in Magnetic Resonance Imaging using tactile feedback

BioRxiv : the Preprint Server for Biology
Florian KrauseRainer Goebel

Abstract

Head motion is a common problem in clinical as well as empirical (functional) Magnetic Resonance Imaging applications, as it can lead to severe artefacts that reduce image quality. The scanned individuals themselves, however, are often not aware of their head motion. The current study explored whether providing subjects with this information using tactile feedback would reduce their head motion and consequently improve image quality. In a single session that included six runs, 24 participants performed three different cognitive tasks: (1) passive viewing, (2) mental imagery, and (3) speeded responses. These tasks occurred in two different conditions: (a) with a strip of medical tape applied from one side of the MR head-coil, via the participant's forehead, to the other side, and (b) without the medical tape being applied. Results revealed that application of medical tape to the forehead of subjects to provide tactile feedback significantly reduced both translational as well as rotational head motion. While this effect did not differ between the three cognitive tasks, there was a negative quadratic relationship between head motion with and without feedback. That is, the more head motion a subject produced without feedback, the s...Continue Reading

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Mentioned in this Paper

Coil Device Component
Study
Magnetic Resonance Imaging
Research Subject
Medicated Tape
Participant
Head Neoplasms
Side
Medicated Pad or Tape
Cognition

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