論文

国際誌
2021年10月22日

Separating spin compartments in arterial spin labeling using delays alternating with nutation for tailored excitation (DANTE) pulse: A validation study using T2 -relaxometry and application to arterial cerebral blood volume imaging.

Magnetic resonance in medicine
  • Shota Ishida
  • ,
  • Hirohiko Kimura
  • ,
  • Naoyuki Takei
  • ,
  • Yasuhiro Fujiwara
  • ,
  • Tsuyoshi Matsuda
  • ,
  • Masayuki Kanamoto
  • ,
  • Yuki Matta
  • ,
  • Nobuyuki Kosaka
  • ,
  • Eiji Kidoya

87
3
開始ページ
1329
終了ページ
1345
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/mrm.29052

PURPOSE: To clarify the type of spin compartment in arterial spin labeling (ASL) that is eliminated by delays alternating with nutation for tailored excitation (DANTE) pulse using T2 -relaxometry, and to demonstrate the feasibility of arterial cerebral blood volume (CBVa ) imaging using DANTE-ASL in combination with a simplified two-compartment model. METHOD: The DANTE and T2 -preparation modules were combined into a single ASL sequence. T2 values under the application of DANTE were determined to evaluate changes in T2 , along with the post-labeling delay (PLD) and the relationship between transit time without DANTE (TTnoVS ) and T2 . The reference tissue T2 (T2_ref ) was also obtained. Subsequently, the DANTE module was embedded into the Hadamard-encoded ASL. Cerebral blood flow (CBF) and CBVa were computed using two Hadamard-encoding datasets (with and without DANTE) in a rest and breath-holding (BH) task. RESULTS: While T2 without DANTE (T2_noVS ) decreased as the PLD increased, T2 with DANTE (T2_DANTE ) was equivalent to T2_ref and did not change with the PLD. Although there was a significant positive correlation between TTnoVS and T2_noVS with short PLD, T2_DANTE was not correlated with TTnoVS nor PLD. Baseline CBVa values obtained at rest were 0.64 ± 0.12, 0.64 ± 0.11, and 0.58 ± 0.15 mL/100 g for anterior, middle, and posterior cerebral arteries, respectively. Significant CBF and CBVa elevations were observed in the BH task. CONCLUSION: Microvascular compartment signals were eliminated from the total ASL signals by DANTE. CBVa can be measured using Hadamard-encoded DANTE-ASL in combination with a simplified two-compartment model.

リンク情報
DOI
https://doi.org/10.1002/mrm.29052
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/34687085
ID情報
  • DOI : 10.1002/mrm.29052
  • PubMed ID : 34687085

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