Magnetic field properties in a birdcage coil

Patrice Boissoles (1) , Gabriel Caloz (1)

1 IRMAR - Institut de Recherche Mathématique de Rennes

Radiofrequency magnetic fields used in MRI experiments have to satisfy specific properties. First, they need to be as homogeneous as possible to excite uniformly the nuclei. Secondly, as the nuclei, these fields need to have a precession movement at Larmor frequency. In this paper we present a numerical study of these properties in the case of the birdcage coil. We derive analytic expression of the RF field through an equivalent circuit model. Properties are validated through numerical simulations.

Mots clés: Birdcage coil; Numerical simulation; Radiofrequency field; Resonant mode

Domaines: Analyse numérique [math.NA]; Ingénierie biomédicale

Patrice Boissoles, Gabriel Caloz. Magnetic field properties in a birdcage coil. 2006. ⟨hal-00020757⟩