@misc{oai:repo.qst.go.jp:00071040,
 author = {Suga, Mikio and Obata, Takayuki and Ikeda, Hajime and Ozawa, Shinya and Koyama, Atsuhisa and Kishimoto, Riwa and et.al and 小畠 隆行 and 池田 啓 and 小澤 慎也 and 岸本 理和},
 month = {May},
 note = {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., ISMRM 2012},
 title = {Brain MR Elastography using Optimized Mechanical Vibration of the Patient Table},
 year = {2012}
}