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Brain MR Elastography using Optimized Mechanical Vibration of the Patient Table
https://repo.qst.go.jp/records/71040
https://repo.qst.go.jp/records/7104090fffac4-642f-4c25-babd-75d2e0cc5a43
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-02-01 | |||||
| タイトル | ||||||
| タイトル | Brain MR Elastography using Optimized Mechanical Vibration of the Patient Table | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Suga, Mikio
× Suga, Mikio× Obata, Takayuki× Ikeda, Hajime× Ozawa, Shinya× Koyama, Atsuhisa× Kishimoto, Riwa× et.al× 小畠 隆行× 池田 啓× 小澤 慎也× 岸本 理和 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Magnetic resonance elastography (MRE) is a noninvasive technique for measuring tissue elasticity [1]. In order to generate waves within the tissue, various external drivers have been proposed [2]. Alternatively, Gallichan et al. [3] suggested that the vibrations of the patient table that result from the impulse of an imaging gradient lobe could be used as a mechanical driving mechanism for MRE. The advantage of this approach is that it can be easily adapted for clinical application. However, the vibration frequency must be optimized so that high spatial resolution and accurate storage-modulus maps (elastogram) can be obtained. In this study, we add sinusoidally switching gradients before a conventional MRE pulse sequence and measure the amplitude of the patient table as it vibrates during acquisition. To evaluate the elasticity of the brain using the specific mechanical resonance frequencies of the patient table, heterogeneous phantom and in-vivo brain experiments are performed. The results suggest that the proposed method will enable accurate measurement of the brain elasticity. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ISMRM 2012 | |||||
| 発表年月日 | ||||||
| 日付 | 2012-05-11 | |||||
| 日付タイプ | Issued | |||||
