title: Motion correction using coil arrays (MOCCA) for free-breathing cardiac cine MRI.
abstract: In this study, we present a motion correction technique using coil arrays (MOCCA) and evaluate its application in free-breathing respiratory self-gated cine MRI. Motion correction technique using coil arrays takes advantages of the fact that motion-induced changes in k-space signal are modulated by individual coil sensitivity profiles. In the proposed implementation of motion correction technique using coil arrays self-gating for free-breathing cine MRI, the k-space center line is acquired at the beginning of each k-space segment for each cardiac cycle with 4 repetitions. For each k-space segment, the k-space center line acquired immediately before was used to select one of the 4 acquired repetitions to be included in the final self-gated cine image by calculating the cross correlation between the k-space center line with a reference line. The proposed method was tested on a cohort of healthy adult subjects for subjective image quality and objective blood-myocardium border sharpness. The method was also tested on a cohort of patients to compare the left and right ventricular volumes and ejection fraction measurements with that of standard breath-hold cine MRI. Our data indicate that the proposed motion correction technique using coil arrays method provides significantly improved image quality and sharpness compared with free-breathing cine without respiratory self-gating and provides similar volume measurements compared with breath-hold cine MRI.
authors.affiliation: Division of Cardiovascular, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.
authors.forename: Peng
authors.initials: P
authors.lastname: Hu
authors.forename: Susie
authors.initials: S
authors.lastname: Hong
authors.forename: Mehdi H
authors.initials: MH
authors.lastname: Moghari
authors.forename: Beth
authors.initials: B
authors.lastname: Goddu
authors.forename: Lois
authors.initials: L
authors.lastname: Goepfert
authors.forename: Kraig V
authors.initials: KV
authors.lastname: Kissinger
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Hauser
authors.forename: Warren J
authors.initials: WJ
authors.lastname: Manning
authors.forename: Reza
authors.initials: R
authors.lastname: Nezafat
mesh_terms: D000328:Adult; D016477:Artifacts; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006321:Heart / Q000033:anatomy & histology*; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008280:Magnetics / Q000295:instrumentation*; D009038:Motion; D009068:Movement; D012016:Reference Values; D015203:Reproducibility of Results; D015656:Respiratory Mechanics; D012680:Sensitivity and Specificity