Sequence Design

This script construct a MRF sequence using Pulseq framework.

Method

To run gen_MRF_sequence_pulseq.m, Pulseq [1] is required. In the script, a MRF sequence based on Jiang's paper [2] is implemented. The flip angles and TR used are shown below:

After running the script, a sequence plot as well as a spiral trajectory plot shown below will be displayed.

A **.seq** file will also be generated in the same folder which has the name as shown below.

This .seq file has been verified on a scanner. User should be able to test the sequence on any scanner with the latest version of pulseq interpreter.

Demo

To test this module, please run Sequence_Design/sequence_design_demo.m. The script calls gen_MRF_sequence_pulseq.m and returns the .seq file and related parameters.

Reference

[1] Layton K, Kroboth S, Jia F et al. Pulseq: A rapid and hardware-independent pulse sequence prototyping framework. Magn Reson Med. 2016;77(4):1544-1552. doi:10.1002/mrm.26235

[2] Jiang Y, Ma D, Seiberlich N, Gulani V, Griswold M. MR fingerprinting using fast imaging with steady state precession (FISP) with spiral readout. Magn Reson Med. 2015;74(6):spcone-spcone. doi:10.1002/mrm.26048