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Related Experiment Videos

Time-resolved MR angiography: optimal parallel imaging method.

J-Y Gauvrit1, M Law, J Xu

  • 1Department of Neuroradiology, EA 2691, Salengro Hospital, University Hospital of Lille, Lille, France. jygauvrit@chru.lille.fr

AJNR. American Journal of Neuroradiology
|May 15, 2007
PubMed
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Time-resolved MR angiography (MRA) with an integrated parallel acquisition technique (IPAT) factor of 2 offers optimal intracranial vessel visualization. This method balances speed and image quality for clinical use.

Area of Science:

  • Radiology
  • Medical Imaging
  • Neuroimaging

Background:

  • Time-resolved MR angiography (TR MRA) enhances spatial and temporal resolution.
  • Parallel imaging techniques improve MRA by separating arterial and venous anatomy.

Purpose of the Study:

  • To evaluate the performance of TR MRA for intracranial vessels.
  • To assess the impact of different integrated parallel acquisition technique (IPAT) factors on TR MRA.

Main Methods:

  • 3D TR MRA was performed at 1.5 T using IPAT factors of 0, 2, and 3.
  • Temporal resolutions ranged from 4.0 to 1.3 seconds.
  • Image quality metrics including SNR, CNR, and artifact presence were analyzed in 14 subjects.

Main Results:

Related Experiment Videos

  • Signal-to-noise ratio (SNR) decreased significantly at IPAT factor 3.
  • Smaller intracranial vessels showed inferior conspicuity with IPAT factors 2 and 3.
  • Larger proximal vessels demonstrated comparable quality between IPAT factors 0 and 2.

Conclusions:

  • An IPAT factor of 2 is recommended for intracranial TR MRA in clinical settings.
  • Adequate contrast administration (at least 5 mL) is crucial for optimal results.
  • TR MRA with IPAT factor 2 effectively provides arterial and venous phase information.