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Magnetic Resonance Elastography using an air ball-actuator
http://hdl.handle.net/10748/5689
http://hdl.handle.net/10748/5689ceaf6f66-20e3-41a9-a145-c9b22f40a62c
名前 / ファイル | ライセンス | アクション |
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10676-001.pdf (4.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2013-08-23 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Magnetic Resonance Elastography using an air ball-actuator | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magnetic resonance elastography | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | pneumatic ball-vibrator | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | actuator | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | mechanical waves | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | propagating waves | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Numano, Tomokazu
× Numano, Tomokazu× Kawabata, Yoshihiko× Mizuhara, Kazuyuki× Washio, Toshikatsu× Nitta, Naotaka× Homma, Kazuhiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The purpose of this study was to develop a new technique for a powerful compact MR Elastography (MRE) actuator based on a pneumatic ball-vibrator. This is a compact actuator that generates powerful centrifugal force vibrations via high speed revolutions of an internal ball using compressed air. This equipment is easy to handle due to its simple principles and structure. Vibration frequency and centrifugal force are freely adjustable via air pressure changes (air flow volume), and replacement of the internal ball. In order to achieve MRI compatibility, all parts were constructed from non-ferromagnetic materials. Vibration amplitudes (displacements) were measured optically by a laser displacement sensor. From a bench test of displacement, even though the vibration frequency increased, the amount of displacement did not decrease. An essential step in MRE is the generation of mechanical waves within tissue via an actuator, and MRE sequences are synchronized to several phase offsets of vibration. In this system, the phase offset was detected by a four-channel optical-fiber sensor, and it was used as an MRI trigger signal. In an agarose gel phantom experiment, this actuator was used to make an MR elastogram. This study shows that the use of a ball actuator for MRE is feasible. |
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言語 | en | |||||
書誌情報 |
Magnetic resonance imaging 巻 31, 号 6, p. 939-946, 発行日 2013-06 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 0730725X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10628574 | |||||
PubMed番号 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | PMID | |||||
関連識別子 | 23602728 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.mri.2013.02.001 | |||||
権利 | ||||||
権利情報 | Pergamon Press | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
出版者 | ||||||
出版者 | Pergamon Press | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | postprint |