Work

A fast method for designing time-optimal gradient waveforms for arbitrary k-space trajectories

Year: 2008

Type: article

Abstract: A fast and simple algorithm for designing time-optimal waveforms is presented. The algorithm accepts a given arbitrary multidimensional k-space trajectory as the input and outputs the time-optimal gradient waveform that traverses k-space along that path in minimum time. The algorithm is noniterative, and its run time is independent of the complexity of the curve, i.e., the number of switches between slew-rate limited acceleration, slew-rate limited deceleration, and gradient amplitude limited regions. The key in the method is that the gradient amplitude is designed as a function of arc length along the k-space trajectory, rather than as a function of time. Several trajectory design examples are presented.

Source: IEEE Transactions on Medical Imaging

DOI: 10.1109/tmi.2008.922699

Authors: Michael Lustig, Seung-Jean Kim, John M. Pauly

Institution: Stanford University

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: green

Funders: National Heart, Lung, and Blood Institute, National Institute of Biomedical Imaging and Bioengineering

Awards: G228044869, G2814766015, G3485089748