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Quiet MR sequences in clinical routine: initial experience in abdominal imaging

Sebastian Fischer1, David M Grodzki2, Markus Domschke3

  • 1Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor Stern Kai 7, 60590, Frankfurt, Germany. sebastian.fischer@kgu.de.

La Radiologia Medica
|November 30, 2016
PubMed
Abstract

Insights

Acoustic noise reduction in MRI is feasible for T2 TSE and T2 HASTE sequences, maintaining diagnostic image quality. However, limitations exist for T1 FLASH and DIXON sequences.

Area of Science:

  • Medical Imaging
  • Acoustics
  • Radiology

Background:

  • Acoustic noise in Magnetic Resonance Imaging (MRI) can impact patient comfort and image quality.
  • Optimizing MRI protocols to reduce noise is crucial for clinical applications.

Purpose of the Study:

  • To assess the feasibility and limitations of acoustic noise reduction in a standard clinical MRI protocol for abdominal imaging.
  • To evaluate the impact of noise reduction on image quality and diagnostic confidence.

Main Methods:

  • Acoustic noise and image quality were evaluated in 17 patients using a standard liver MRI protocol.
  • T2 TSE (T2-weighted Turbo Spin Echo) and GRE (Gradient-Recalled Echo) sequences were compared with quiet optimizations.
  • Two blinded readers assessed artifacts, organ delineation, and diagnostic confidence. Signal-to-Noise Ratio (SNR) and Contrast-to-Noise Ratio (CNR) were measured.

Main Results:

  • Significant acoustic noise reduction was observed in T2 TSE (-30.7%) and T2 HASTE (-22.6%) sequences.
  • SNR and CNR decreased for quiet T2 TSE and T2 HASTE sequences but increased for T1 DIXON and T1 FLASH sequences.
  • Inter-rater reliability for image quality assessment was high (k=0.987).

Conclusions:

  • Sequence-based acoustic noise optimization offers significant benefits for T2 TSE and T2 HASTE abdominal MRI.
  • Image quality and diagnostic confidence were maintained in T2 TSE and T2 HASTE sequences despite noise reduction.
  • Challenges remain for noise reduction in T1 FLASH and DIXON sequences.
Keywords:
Acoustic noise reductionImage qualityPatient comfortQuiet MRI

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