Are trueFISP images T2/T1-weighted?

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

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)684-688
Number of pages5
JournalMagnetic Resonance in Medicine
Volume48
Issue number4
DOIs
Publication statusPublished - Oct 1 2002
Externally publishedYes

Keywords

  • Gray/white matter contrast
  • Steady-state free precession
  • Transient state
  • TrueFISP

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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  • Cite this

    Huang, T. Y., Huang, I. J., Chen, C. Y., Scheffler, K., Chung, H. W., & Cheng, H. C. (2002). Are trueFISP images T2/T1-weighted? Magnetic Resonance in Medicine, 48(4), 684-688. https://doi.org/10.1002/mrm.10260