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 journalArticlepeer-review

47 Citations (Scopus)


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
Issue number4
Publication statusPublished - Oct 1 2002
Externally publishedYes


  • 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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