Descriptions: this sequence combines pseudo continuous arterial spin labeling and 3D fast spin echo encoding and spiral trajectory acquisition techniques.

Main features: 1) scalable for either single shot or multi-shot. In single shot (RF excitation) mode, you can choose different number of spiral trajectories. In multi-shot, you can choose different number of within-plane or partition-wise segments.

2) variable sampling density.

3) variable ratio of kspace to be fully sampled in multi-shot or multi-spiral mode.

4) M0 acquisition is embedded in the same sequence in the very beginning.

5) ICE-based online image reconstruction with multi-threads.

To be added:

6) online CBF quantification.

7) parallel imaging.

Reference.

For the sequence:

Marta Vidorreta*, Ze Wang*, Ignacio Rodríguez, María A. Pastor, John A. Detre and María A. Fernández-Seara, Comparison of 2D and 3D single-shot ASL perfusion fMRI sequences, NeuroImage, 2012, 66C:662-671. (*contributed equally)

Right now, there is no paper reference for the ICE recon, but appropriate acknowledgement to Ze Wang will be appreciated.

To get the sequence and recon, please contact your Siemens support to initiate a C2P. For anybody in Europe, please contact our colleague Dr. Maria Fernandez-Seara.