Reducing sensitivity losses due to respiration and motion in accelerated echo planar imaging by reordering the autocalibration data acquisition

• Published in: Magnetic resonance in medicine Vol. 75; no. 2; pp. 665 - 679
• Main Authors: Polimeni, Jonathan R., Bhat, Himanshu, Witzel, Thomas, Benner, Thomas, Feiweier, Thorsten, Inati, Souheil J., Renvall, Ville, Heberlein, Keith, Wald, Lawrence L.
• Format: Journal Article
• Language: English
• Published: United States Blackwell Publishing Ltd 01.02.2016; Wiley Subscription Services, Inc
• Subjects: Adult; Brain - anatomy & histology; Calibration; Data acquisition; Echo-Planar Imaging - methods; Female; GRAPPA; Healthy Volunteers; high-field fMRI; high-resolution fMRI; Humans; Image Enhancement - methods; Image processing; Image Processing, Computer-Assisted - methods; Image quality; image reconstruction; Male; Middle Aged; Motion; parallel imaging; Phantoms, Imaging; Respiration; Segments; Sensitivity; Signal quality; Signal-To-Noise Ratio; GRAPPA; high-resolution fMRI; parallel imaging; high-field fMRI; image reconstruction

Purpose To reduce the sensitivity of echo‐planar imaging (EPI) auto‐calibration signal (ACS) data to patient respiration and motion to improve the image quality and temporal signal‐to‐noise ratio (tSNR) of accelerated EPI time‐series data. Methods ACS data for accelerated EPI are generally acquired...