Design and construction of a gradient coil for high resolution marmoset imaging
| Autor: | Ryan Chaddock, L. Martyn Klassen, Blaine A. Chronik, Brian Dalrymple, Justin Peterson, William B. Handler, Joseph S. Gati, Geron Andre Bindseil, Chad T. Harris, Kyle M. Gilbert, Frank Van Sas |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
030218 nuclear medicine & medical imaging law.invention 03 medical and health sciences Magnetics 0302 clinical medicine Optics law Region of interest Shielded cable Animals Boundary element method General Nursing business.industry White matter Temperature Brain Callithrix Equipment Design Magnetic Resonance Imaging Power (physics) Marmoset Inductance Third order Electromagnetic coil Gradient coil Current (fluid) business 030217 neurology & neurosurgery Algorithms |
| Zdroj: | Brain and Mind Institute Researchers' Publications |
| Popis: | A gradient coil with integrated second and third order shims has been designed and constructed for use inside an actively shielded 310 mm horizontal bore 9.4 T small animal MRI. An extension of the boundary element method, to minimise the power deposited in conducting surfaces, was used to design the gradients, and a boundary element method with a constraint on mutual inductance was used to design the shims. The gradient coil allows for improved imaging performance and was optimized for an imaging region appropriate for marmoset imaging studies. Efficiencies of 1.5 mT m-1 A-1 were achieved in a 15 cm wide bore while maintaining gradient uniformity ≤5% over the 8 cm region of interest. Two new cooling methods were implemented which allowed the gradient coil to operate at 100 A RMS, 25 % of max current with a temperature rise below 30 C. |
| Databáze: | OpenAIRE |
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