Are trueFISP images T2/T1-weighted?

Teng Yi Huang, Ing Jye Huang, Cheng Yu Chen, Klaus Scheffler, Hsiao Wen Chung, Hui Cheng Cheng

研究成果: 雜誌貢獻文章同行評審

42 引文 斯高帕斯(Scopus)

摘要

Images acquired using the TrueFISP technique (true fast imaging with steady-state precession) are generally believed to exhibit T2/T1-weighting. In this study, it is demonstrated that with the widely used half-flip-angle preparation scheme, approaching the steady state requires a time length comparable to the scan time such that the transient-state response may dominate the TrueFISP image contrast. Two-dimensional images of the human brain were obtained using various phase-encoding matrices to investigate the transient-state signal behavior. Contrast between gray and white matter was found to change significantly from proton-density- to T2/T1-weighted as the phase-encoding matrix size increased, which was in good agreement with theoretical predictions. It is concluded that TrueFISP images in general exhibit T2/T1-contrast, but should be more appropriately regarded as exhibiting a transient-state combination of proton-density and T2/T1 contrast under particular imaging conditions. Interpretation of tissue characteristics from TrueFISP images in clinical practice thus needs to be exercised with caution.
原文英語
頁(從 - 到)684-688
頁數5
期刊Magnetic Resonance in Medicine
48
發行號4
DOIs
出版狀態已發佈 - 十月 1 2002
對外發佈Yes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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