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Related Experiment Videos

Coronary MRA with 3D undersampled projection reconstruction TrueFISP.

Andrew C Larson¹, Orlando P Simonetti, Debiao Li

¹Department of Biomedical Engineering, Northwestern University, Chicago, Illinois, USA.

Magnetic Resonance in Medicine

|September 28, 2002

Summary

Undersampled projection reconstruction (PR) enables faster, high-resolution coronary artery imaging. This technique, using TrueFISP, achieves isotropic in-plane voxel size within a single breathhold, improving cardiac imaging efficiency.

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Area of Science:

Medical Imaging
Cardiovascular Imaging
Magnetic Resonance Imaging

Background:

Undersampled projection reconstruction (PR) offers imaging efficiency by trading signal-to-noise ratio (SNR) or streak artifacts for fewer k-space views.
Fourier imaging techniques face tradeoffs between resolution/aliasing and acquired k-space lines.
TrueFISP (true fast imaging with steady state precession) is well-suited for undersampled PR due to its high SNR.

Purpose of the Study:

To evaluate the feasibility of using undersampled 3D PR TrueFISP for breathhold coronary artery imaging.
To compare the spatial resolution of PR TrueFISP with Fourier TrueFISP within the same imaging time.

Main Methods:

Utilized segmented 3D PR TrueFISP for coronary artery imaging within a 24-heartbeat scheme.

Related Experiment Videos

Acquired 93 to 153 views per partition for 3D PR TrueFISP.

Conducted phantom studies and preliminary in vivo comparisons.

Main Results:

Demonstrated improved spatial resolution of PR over Fourier TrueFISP for the same imaging duration.
Achieved a 1.0 x 1.0 mm² isotropic in-plane voxel size with 3D PR TrueFISP.
Observed streak artifacts in some images, but these did not hinder coronary artery visualization.

Conclusions:

3D undersampled PR TrueFISP enables isotropic in-plane voxel size acquisition within a single breathhold.
This technique shows promise for efficient and high-resolution coronary artery imaging.
PR TrueFISP offers an improved approach compared to conventional Fourier methods for cardiac applications.