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 Index of Pictures
Index of Pictures / ..

  Axial MR image Sagittal MR image Claustrophobia A schematic of an MRI scanner. The magnet fields that are generated by the gradient coils in order to produce images. Representation of the triangular boundary element method. A current density flows on the blue surface and generates a magnetic field in the red region.  

  Result of the inverse boundary element method for an X gradient coil incorporating shoulder cut-outs. Building the shoulder-slotted gradient coil 1: Winding the Z0 shim. Building the shoulder-slotted gradient coil 1: The X gradient layer. Building the shoulder-slotted gradient coil 1: The Y gradient layer. Building the shoulder-slotted gradient coil 1: The X2-Y2 shim. Building the shoulder-slotted gradient coil 1: The XY shim.  

  Building the shoulder-slotted gradient coil 1: The Z2 shim. Building the shoulder-slotted gradient coil 1: Almost ready for potting. Building the shoulder-slotted gradient coil 1: Finished gradient and shim set in from of the Nottingham 3T (fire extinguisher at the ready!) Cross-section of the combined PET-MRI system. Results of the inverse boundary element method coil design of the split X and Z gradient coils and their field plots on the right. Part way through construction (left) and pre-potting tests of the split gradient coil for combined PET-MRI.  

  Close up of the soldering on the split X gradient coil. The finished split gradient set for combined PET-MRI. Scan of a large bottle using split gradient coils. Simultaneous, composite PET-MRI image. Very strong head X gradient coil designed using the inverse boundary element method. rapid prototyped, half-scale head X gradient coil and measured magnetic field  

  A very short whole-body gradient coil (after Shvartsman) designed with an inverse axisymmetric boundary element method. It's time for tea! It's time for a non-branded cola drink! Susceptibility-indced magnetic field measured in the human head. The improvement of a custom field-map-based shimming routine over FASTMAP at 7T (after Sanchez-Panchuelo). Demonstration of the method of parcellated dynamic shimming.  

  Simulated improvement of parcellated dynamic shimming over conventional and slice-by-slice dynamic shimming for 11 subjects. Simulated improvement of parcellated dynamic shimming over conventional and slice-by-slice dynamic shimming for a sinlge subject. Wire-pattern for a one quadrant of a very short, power-minimised X gradient coil. Wire-pattern for a one quadrant of a very short, X gradient coil designed with minimum maximum current density, minimax|j|. Thermal image of a small-scale prototype X gradient designed with minimum power. Thermal image of a small-scale prototype X gradient designed with minimum maximum current density.  

  Thermal image of my laptop. Thermal image of me. Early prototypes of minimax|j| coil construction. Demonstration of the minimax|j| coil design method for shoulder-slotted X gradient coils with approximately double the efficiency. Wire tracks for a shielded, asymmetric head X gradient coil. Top is the top layer of a double layer production method. Wires and magnetic field plot of a shielded, asymmetric head gradient coil using minimax|j| to evenly spread the wires.  

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Last Updated: 20 August, 2010, 5:36pm