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Nonsubtractive spiral phase contrast velocity imaging
L C Man1, J M Pauly, D G Nishimura
1Magnetic Resonance Systems Research Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA 94305-4055, USA. lcman@isl.stanford.edu
Magnetic Resonance in Medicine
|September 30, 1999
Summary
This study introduces a new phase contrast velocity imaging method. It reduces scan time by 50% and accurately measures blood flow using only one image acquisition.
Area of Science:
- Medical Imaging
- Biophysics
- Cardiovascular Science
Background:
- Phase contrast velocity imaging is crucial for in vivo blood flow measurement.
- Conventional methods require multiple image acquisitions, increasing scan time and reducing temporal resolution.
- Non-flow-related phase variations lead to inaccurate background velocity measurements.
Purpose of the Study:
- To develop a novel phase contrast velocity imaging technique.
- To reduce scan time and improve efficiency in flow measurement.
- To enable accurate in vivo flow quantification with a single image acquisition.
Main Methods:
- A new phase contrast velocity imaging technique was developed.
- Background phase variations are estimated and removed from a single flow-encoded image.
- The method was validated using phantom and in vivo studies.
Main Results:
- The novel technique requires only a single image acquisition.
- Scan time is reduced by 50% compared to conventional methods.
- Effective and accurate flow measurements were demonstrated in various body vessels.
Conclusions:
- The introduced single-image phase contrast velocity imaging method is effective.
- This technique offers a significant reduction in scan time for accurate in vivo flow measurement.
- It provides a promising alternative for cardiovascular flow imaging.