Measurement of masticatory activity by application of PET-MRI registration technique

S. Yamaguchi, H. Rikimaru, K. Yamaguchi, M. Itoh, M. Watanabe

Research output: Contribution to journalReview articlepeer-review


Positron emission tomography and 18F-fluoro-deoxy-glucose (FDG-PET) can be used to quantify the masticatory activity. We tested whether application of PET-magnetic resonance image (MRI) registration would enable more exact quantification. The mean distance between the left sublingual gland on PET and registered MR images was less than the spatial resolution of PET. A standardized uptake ratio of the contralateral lateral pterygoid muscle was the highest among all masticatory muscles during lateral excursions. These results suggest that PET-MRI registration technique is useful in assessing masticatory activity.

Original languageEnglish
Pages (from-to)61-62
Number of pages2
JournalInternational Congress Series
Publication statusPublished - 2005 Sept


  • Image registration
  • Magnetic resonance image
  • Masticatory muscle
  • Positron emission tomography


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