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T(1) quantification with inversion recovery TrueFISP.

K Scheffler1, J Hennig

  • 1Section of Medical Physics, Department of Diagnostic Radiology, University of Freiburg, Germany. ksch@ukl.uni-freiburg.de

Magnetic Resonance in Medicine
|April 3, 2001
PubMed
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The TrueFISP sequence accurately measures T(1) recovery, outperforming conventional snapshot FLASH methods for quantitative T(1) imaging. This technique offers improved accuracy and signal-to-noise ratio in MRI scans.

Area of Science:

  • Magnetic Resonance Imaging
  • Quantitative MRI Techniques
  • Biomedical Engineering

Background:

  • Conventional snapshot FLASH sequences for longitudinal magnetization recovery can be affected by excitation pulses, leading to T(1) estimation errors.
  • Accurate T(1) measurements are crucial for various MRI applications, including tissue characterization and contrast agent monitoring.

Purpose of the Study:

  • To evaluate the TrueFISP sequence for quantitative T(1) measurements by assessing longitudinal magnetization recovery.
  • To compare the performance of TrueFISP-based T(1) estimation with conventional methods.

Main Methods:

  • Experiments were conducted using Gd-doped water phantoms and human subjects.
  • The TrueFISP sequence was employed for inversion recovery to monitor longitudinal magnetization.

Related Experiment Videos

  • T(1) values were derived and compared against a single-point method.

    • Main Results:

    • T(1) values obtained using inversion recovery TrueFISP showed excellent agreement with the single-point method, even at flip angles up to 50 degrees.
    • The TrueFISP method demonstrated superior T(1) accuracy and signal-to-noise ratio (SNR) compared to the conventional inversion recovery snapshot FLASH technique.

    Conclusions:

    • The TrueFISP sequence is a viable and effective method for quantitative T(1) measurements.
    • This technique offers advantages in accuracy and SNR over traditional snapshot FLASH methods for T(1) estimation.