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Fast Three‐dimensional K ‐Space Trajectory Design Using Missile Guidance Ideas by Roberto Mir; Andres Guesalaga; Juan Spiniak; Marcelo Guarini; Pablo Irarrazaval is a Medicine article available to read on EtoBox.

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## Abstract Three‐dimensional (3D) __k__‐space trajectories are needed to acquire volumetric images in MRI. While scan time is determined by the trajectory efficiency, image quality and distortions depend on the shape of the trajectories. There are several 3D trajectory strategies for sampling the __k__‐space using rectilinear or curve schemes. Since there is no evidence about their optimality in terms of image quality and acquisition time, a new design method based on missile guidance ideas is explored. Since air‐to‐air missile guidance shares similar goals and constraints with the problem of __k__‐space trajectory design, a control approach for missiles is used to design a 3D trajectory. The __k__‐space is divided into small cubes, and each one is treated as a target to be sampled. The main goal is to cover the entire space as quickly and efficiently as possible, with good performance under different conditions. This novel design method is compared to other trajectories using simulated and real data. As an example, a trajectory that requires 0.11 times the number of shots needed by the cylindrical 3DFT acquisition was designed. This trajectory requires more shots (1.66 times) tha

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Author

Roberto Mir; Andres Guesalaga; Juan Spiniak; Marcelo Guarini; Pablo Irarrazaval

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0740-3194)

Published

2004

Language

EN

Field

Medicine (Health Sciences)