Principles of the magnetic resonance imaging movie method for articulatory movement
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Magnetic resonance imaging (MRI) has become a critical tool for dental examination. MRI has many advantages over radiographic examination methods, including the lack of a requirement for patient exposure and the ability to capture high-contrast images of various tissue and organ types. However, MRI also has several limitations, including long examination times and the existence of metallic or motion artifacts. A cardiac imaging method using cine sequences was developed in the 1990s. This technique allows for analysis of heart movement and functional blood flow. Moreover, this method has been applied in dentistry. Recent research involving 3 T MRI has led to the achievement of a temporal resolution of < 10 ms, surpassing the frame rate of typical video recording. The current review introduces the history and principles of the cine sequence method and its application to the oral and maxillofacial regions.
KeywordsSegmented k-space cine sequence Artifact Pronunciation Teeth
This study was supported by JSPS KAKENHI Grant Number JP16K1150800.
Compliance with ethical standards
Conflict of interest
Midori Yoshida, Eiichi Honda, Erika Ozawa, Maristela Sayuri Inoue-Arai, Hiroko Ohmori, Keiji Moriyama, Takashi Ono, Tohru Kurabayashi, Hozumi Yoshihara, and Kulthida Nunthayanon Parakonthun declare that they have no conflict of interest.
Research involving human and/or animal rights
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.
Informed consent was obtained from all patients for being included in the study.
The research was approved by the Institutional Ethical Review Board of the Tokyo Medical and Dental University (Number 1282).
- 23.Siemens Healthcare. Bandwidth in MRI? http://dev.clinical-mri.com.s166757.gridserver.com/wp-content/uploads/software_hardware_updates/Flash_52_HIDI_Bandwidth_13_03_19.pdf. Accessed May 2018.
- 33.Nunthayanon K, Honda E, Ohmori H, Inoue-Araie MS, Shimazaki K, Kurabayashi T, et al. A pilot study on characterization of articulatory movements during fricative /s/ sound in an anterior open bite subject: a tooth-visualized 3-T MRI movie evaluation. J World Feder Orthod. 2015;4:71–7.CrossRefGoogle Scholar
- 38.Siemens Healthineers. Compressed sensing cardiac cine. https://www.healthcare.siemens.com/magnetic-resonance-imaging/options-and-upgrades/clinical-applications/compressed-sensing-cardiac-cine#. Accessed Aug 2018.