論文

査読有り 国際誌
2019年10月17日

Intravascular signal suppression and microvascular signal mapping using delays alternating with nutation for tailored excitation (DANTE) pulse for arterial spin labeling perfusion imaging.

Magma (New York, N.Y.)
  • Yasuhiro Fujiwara
  • ,
  • Hirohiko Kimura
  • ,
  • Shota Ishida
  • ,
  • Masayuki Kanamoto
  • ,
  • Naoyuki Takei
  • ,
  • Tsuyoshi Matsuda
  • ,
  • Nobuyuki Kosaka
  • ,
  • Toshiki Adachi

33
3
開始ページ
367
終了ページ
376
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s10334-019-00785-9

OBJECTIVE: To optimize the delays alternating with nutation for tailored excitation (DANTE) pulse as a vascular crushing gradient to eliminate macro-and micro-vascular signals and to generate a macrovascular space-related map by applying DANTE with multiple conditions. MATERIALS AND METHODS: Numerical simulation was performed to estimate the optimal flip angle (FA) of the DANTE. A phantom study was conducted to evaluate the impact of the FA and gradient area (GA) of the DANTE with three flow velocities and various parameters of the DANTE. Finally, an in vivo study was performed to assess the optimal DANTE parameters and to map the estimated macrovascular signal of the arterial spin labeling (ASL) signal. RESULTS: Numerical simulation revealed that the decrease of magnetization plateaued at 12.5° of FA. The phantom study showed that the setting of larger FA or GA decreased the ASL signals. The decrease of the ASL signal depended on the flow velocity, and the dependence increased with decreasing GA. The in vivo study revealed that larger FA and GA decreased the perfusion signal. DISCUSSION: An optimized DANTE makes it possible to efficiently suppress the macro-and-micro vascular signals depending on the flow velocity. Moreover, macrovascular signal mapping may be useful to assess altered hemodynamic states.

リンク情報
DOI
https://doi.org/10.1007/s10334-019-00785-9
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/31625029
ID情報
  • DOI : 10.1007/s10334-019-00785-9
  • PubMed ID : 31625029

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