NDLI: Estimation of Viscoelastic Properties from Multiple Phase MR Elastography Using Elastic Wave Fitting Method

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Estimation of Viscoelastic Properties from Multiple Phase MR Elastography Using Elastic Wave Fitting Method

Content Provider	Semantic Scholar
Author	Oida, Takenori Ohno, Tomokazu Amano, Akira Kang, Yu-Bong Okamoto, Jun Azuma, Takashi Tsutsumi, Sadami Matsuda, Tetsuya
Copyright Year	2006
Abstract	あらまし医療分野において組織の硬さは,診断あるいは疾患の進行状況の把握に用いられる重要な情報の一つであり,客観的な診断のためには,硬さの定量的な計測法が重要である.硬さの指標である粘弾性定数を非侵襲的に計測する手法として,Magnetic Resonance Elastography(MRE)法が提案されている.MRE法では, 伝搬する波の局所波長と局所減衰率から粘弾性定数を求めるが,MRE 画像は S/N が低いため,ノイズの影響を低減させる目的で位相の異なる多重位相 MRE 画像を用いる手法が検討されている.本研究では,多重位相 MRE 画像に対する関数当てはめにより粘弾性定数を導出する弾性波当てはめ法を提案する.提案手法は,多重位相 MRE画像に対して粘弾性波を当てはめるが,粘弾性定数の空間方向への変化率や画像に含まれるノイズに応じて導出の空間分解能を任意に設定できるという特長がある.シミュレーション画像を用いた実験とシリコンゲルファントムを用いた実験により提案手法の有効性を確認した. キーワード MR Elastography,多重位相 MRE 画像,粘弾性定数,関数当てはめ
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ritsumei.ac.jp/~a-amano/publications/j89-d_10_2348.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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