title: Prospective self-gated nonenhanced magnetic resonance angiography of the peripheral arteries.
abstract: Most nonenhanced MRA techniques for evaluating peripheral artery disease (PAD) require cardiac synchronization through physiological gating. Electrocardiographic gating is the most popular method for cardiac synchronization; however, it is subject to interference from switching magnetic field gradients and radiofrequency pulses. A method is described for self-gated nonenhanced MRA that does not require the use of electrocardiographic gating. Imaging was prospectively triggered by detecting the acceleration of blood flow during systole with a reference-less phase contrast navigator. The technique was implemented for nonsubtractive nonenhanced MRA using quiescent-interval single-shot MRA. The lower extremity peripheral arteries of eight healthy subjects were imaged using electrocardiographic-, pulse-, and self-gated quiescent-interval single-shot. Self-gated quiescent-interval single-shot triggered with 99% accuracy. There were no significant differences in relative contrast, contrast-to-noise ratio, or image quality between self-gated and electrocardiographic-gated quiescent-interval single-shot MRA (P > 0.05). Image quality with pulse gating was inferior.
authors.affiliation: Department of Radiology, NorthShore University HealthSystem, Evanston, Illinois, USA. erikofferman@gmail.com
authors.forename: Erik J
authors.initials: EJ
authors.lastname: Offerman
authors.forename: Ioannis
authors.initials: I
authors.lastname: Koktzoglou
authors.forename: Christopher
authors.initials: C
authors.lastname: Glielmi
authors.forename: Anindya
authors.initials: A
authors.lastname: Sen
authors.forename: Robert R
authors.initials: RR
authors.lastname: Edelman
mesh_terms: D004562:Electrocardiography; D006801:Humans; D007866:Leg / Q000098:blood supply*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D058729:Peripheral Arterial Disease / Q000175:diagnosis*