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Updated: Jul 15, 2026
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Phase Contrast Magnetic Resonance Imaging in the Rat Common Carotid Artery
Published on: September 5, 2018
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
Summary
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:
- 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.
