論文

査読有り
2017年11月

Clinical evaluation of time-of-flight MR angiography with sparse undersampling and iterative reconstruction for cerebral aneurysms

NMR IN BIOMEDICINE
  • Yasutaka Fushimi
  • ,
  • Tomohisa Okada
  • ,
  • Takayuki Kikuchi
  • ,
  • Akira Yamamoto
  • ,
  • Tsutomu Okada
  • ,
  • Takayuki Yamamoto
  • ,
  • Michaela Schmidt
  • ,
  • Kazumichi Yoshida
  • ,
  • Susumu Miyamoto
  • ,
  • Kaori Togashi

30
11
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/nbm.3774
出版者・発行元
WILEY

Compressed sensing (CS) MRI has just been introduced to research areas as an innovative approach to accelerate MRI. CS is expected to achieve higher k-space undersampling by exploiting the underlying sparsity in an appropriate transform domain. MR angiography (MRA) provides high spatial resolution information on arteries; however, a relatively long acquisition time is necessary to cover a wide volume. Reduction of acquisition time by CS for time-of-flight (TOF) MR angiography (Sparse-TOF) is beneficial in clinical examinations; therefore, the clinical validity of Sparse-TOF needs to be investigated. The aim of this study was to compare the diagnostic capability of TOF MRA between parallel imaging (PI)-TOF with an acceleration factor of 3 (annotated as 3x) and Sparse-TOF (3x and 5x) in patients with cerebral aneurysms. PI-TOF (3x) and Sparse-TOF (3x and 5x) imaging were performed in 20 patients using a 3 T MRI system. Aneurysms in PI-TOF (3x) and Sparse-TOF (3x and 5x) were blindly rated as visible or scarcely visible by neuroradiologists. The neck, height and width of aneurysms were also measured. Twenty-six aneurysms were visualized and rated as visible in PI-TOF (3x) and Sparse-TOF (3x and 5x), with excellent agreement between two raters. No significant differences were found in measured neck, height or width of aneurysms among them. Sparse-TOF (3x and 5x) were acquired and reconstructed within 6 min, and cerebral aneurysms were visible in both of them with equivalent quality to PI-TOF (3x). Sparse-TOF (5x) is a good alternative to PI-TOF (3x) to visualize cerebral aneurysms.

リンク情報
DOI
https://doi.org/10.1002/nbm.3774
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28796397
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000417914100008&DestApp=WOS_CPL
ID情報
  • DOI : 10.1002/nbm.3774
  • ISSN : 0952-3480
  • eISSN : 1099-1492
  • PubMed ID : 28796397
  • Web of Science ID : WOS:000417914100008

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