Wavelet-encoding gradient-echo imaging sequence using real-time de-noising method for acquisition time reduction.
OBJECTIVE
To reduce acquisition time and increase signal-to-noise ratio (SNR) of the wavelet-encoding gradient-echo (GE-WE) sequence used in small field of view dynamic magnetic resonance imaging.


METHODS
A GE-WE imaging sequence acquires wavelet lines from a 3-Tesla scanner. Those with intensity below a given threshold are skipped in real time, improving SNR and reducing acquisition time.


RESULTS
The SNR of GE-WE images increases by approximately three times in simulation, while the acquisition time reduction ranges from 5 to 10% on phantom tests.


CONCLUSIONS
This technique improves the SNR of GE-WE images, while reducing acquisition time.
Serrai
Hacene
H
National Research Council of Canada, Institute for Biodiagnostics, Winnipeg, Canada. Hacene.Serrai@cnrc-nrc.gc.ca
Young
Richard
R
D016477:Artifacts; D017352:Echo-Planar Imaging / Q000295:instrumentation / Q000379:methods*; D009716:Numerical Analysis, Computer-Assisted; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013997:Time Factors