Wrapped Edge Gradient Coil for Mri-pet Animal Imaging

Introduction: The medical imaging methods of Computed Tomography (CT), Magnetic Resonance Imaging (MRI) and Positron Emission Tomography (PET) are well established, each with their own advantages and disadvantages. There appears to be an ever increasing need to combine these modes of imaging, with the view of providing earlier diagnosis of disease, improved treatment planning and better patient care. Moreover, the concepts of MRI-PET and CT-PET are well established, but in the case of MRI-PET many challenges persist. Nevertheless, our work is aimed at MRI-PET scanners and primarily on the improvement of magnets and gradients [1]. Here we propose an open transverse gradient coil arrangement, which is suitable for small animal imaging. The z-gradient coil is known to be simpler to design; therefore main challenges are concerned with the design of xand y-gradient coil windings, whereby the x-gradient coil is the same as a y-gradient when a 90 rotation is applied.