title: Self-gated PROPELLER-encoded cine cardiac imaging.
abstract: This study uses the k-space center over-sampling property of PROPELLER encoding to detect cardiac and respiratory motion using raw k-space data. Using the motion information, cine cardiac imaging is self-gated. The data acquisition process requires neither electrocardiography triggering nor patient breath-holding. Using physiology motion information, this post-processing method rearranges the k-space data into groups corresponding to cardiac and respiratory phases. The PROPELLER blades of the same groups are combined to produce cine high-resolution images. This approach reduces the potential discrepancy of the k-space data and the motion-related artifacts in the reconstructed image because all blades in a group are acquired at consistent cardiac and respiratory phases. The study concludes that self-gated cine cardiac imaging is feasible using PROPELLER encoding. It is a potentially practical tool for cine cardiac imaging.
authors: Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, ROC.
authors: Chi-Chung
authors: CC
authors: Wang
authors: Teng-Yi
authors: TY
authors: Huang
mesh_terms: D000465:Algorithms; D016477:Artifacts; D001696:Biomechanical Phenomena; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D003971:Diastole; D005240:Feasibility Studies; D006331:Heart Diseases / Q000175:diagnosis* / Q000473:pathology / Q000503:physiopathology; D006339:Heart Rate; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D011237:Predictive Value of Tests; D012119:Respiration; D012984:Software; D013599:Systole; D013997:Time Factors; D055815:Young Adult