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Related Experiment Videos

Comparison between conventional and fast spin-echo stir sequences

K Hittmair1, S Trattnig, C J Herold

  • 1Department of Radiology, University of Vienna, Austria.

Acta Radiologica (Stockholm, Sweden : 1987)
|November 1, 1996
PubMed
Summary
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Short inversion-time inversion-recovery (STIR) and TurboSTIR sequences offer similar fat suppression and lesion detection. TurboSTIR significantly reduces scan time and artifacts, making it preferable before contrast administration.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics

Background:

  • Short inversion-time inversion-recovery (STIR) is a widely used MRI sequence for fat suppression.
  • TurboSTIR is a faster variant of STIR, potentially offering improved efficiency.

Purpose of the Study:

  • To compare the contrast behavior and characteristics of STIR and TurboSTIR sequences.
  • To evaluate the impact of sequence parameters on fat suppression and signal characteristics.

Main Methods:

  • Phantom studies with varying Gd-DTPA concentrations and a fat phantom to assess T1 relaxation time dependence.
  • Clinical evaluation of TurboSTIR in 30 patients with musculoskeletal abnormalities, comparing with STIR and postcontrast TurboSTIR images.

Main Results:

Related Experiment Videos

  • TurboSTIR requires a shorter inversion time for fat suppression and may have lower contrast-to-noise ratios without optimization.
  • Optimized TurboSTIR (shorter TI, more averages) demonstrates identical contrast behavior and lesion sensitivity to STIR.
  • TurboSTIR significantly reduces scan time, minimizes artifacts, but contrast uptake can reduce lesion conspicuity.

    • Conclusions:

    • TurboSTIR sequences are a viable replacement for conventional STIR sequences.
    • Performing TurboSTIR before contrast administration is recommended for optimal imaging.