NMR phase encoding using twisted B1 fields
Mercredi 7 juin 2017 11:00
- Duree : 1 heure
Lieu : Seminar Room 7/8 - ILL 1, 71 avenue des Martyrs, Grenoble
Orateur : Christopher BIDINOSTI (Department of Physics, University of Winnipeg)
Phase encoding via applied spatial gradients in the magnitude of the B0 field is the standard technique for sensitizing NMR to spin distribution and diffusion. In this talk, I will introduce a new method for phase encoding that utilizes B1 phase-gradient fields only. These “twisted” fields are (ideally) uniform in magnitude with a linearly varying phase along one spatial direction. The traversal of k-space is achieved here through a succession of -pulses from alternate phase-gradient coils. This RF-only approach can eliminate some of the disadvantages associated with conventional phase encoding – such as equipment expense, power consumption, mechanical vibration, and acoustic noise – and could lead, for example, to a cheaper, quieter MRI scanner. This technique is still at an early stage in its development and will certainly benefit from further innovation in hardware and pulse design. I will discuss recent work from Winnipeg and Paris, in particular the application of B1 phase encoding to very low field magnetic resonance.
Contact : tellier@ill.fr
Discipline évènement : (Physique)
Entité organisatrice : (ILL)
Nature évènement : (Séminaire)
Evènement répétitif : (General ILL Seminar - College 3)
Site de l'évènement : Polygone scientifique
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