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Respiratory Ordered Phase Encoding (ROPE)
312
Citations
0
References
1985
Year
Nuclear ImagingEngineeringAdvanced ImagingMagnetic Particle ImagingBiomedical EngineeringDiagnostic ImagingMagnetic Resonance ImagingImaging AgentsBiomechanicsMolecular ImagingBiophysicsRadiologyRelaxometryHealth SciencesPhysiological PrincipleMedical ImagingRespiratory SignalRespiration (Physiology)Measurement ImagingSpin Warp TechniquePattern FormationMagnetic Resonance SpectroscopyBiomedical ImagingResonanceFunctional X-ray ImagingOperating Room ImagingElectrophysiology
The study proposes a method to reduce respiratory artefact in spin‑warp MRI. Rows are ordered according to the respiratory signal so that the phase‑encoding gradient timing varies smoothly with row number. Data are acquired each respiratory cycle, keeping overall scan time unchanged. Index terms include artifacts, physics, and techniques in nuclear magnetic resonance.
A method of reducing respiratory artefact when using the spin warp technique of magnetic resonance imaging is described. A respiratory signal is used to determine the order in which the rows of the data matrix are measured. The aim is to make the respiratory signal at the time of each phase encoding gradient a slowly varying function of the time integral of the gradient and hence of the row number. Data are collected during each cycle of the imaging sequence; thus the scanning time is not increased. Index Terms: Artifacts— Nuclear magnetic resonance, physics—Nuclear magnetic resonance, techniques—Nuclear magnetic resonance.