The following sequences are available for ODIN and can be used as a template for your own sequence(s):
Diffusion tensor sequence based on PROPELLER-EPI. A simple Stejskal-Tanner gradient pair around the refocusing pulse is used for diffusion weighting.
This is a feature-rich multislice EPI method. The template scan for phase correction is sampled before the repetitions. A field-map scan can be acquired prior to the actual scan for distortion correction.
Single-shot TrueFISP (balanced SSFP) sequence. See for example Scheffler et.al. Eur Radiol (2003) 13:2409-2418
This is a simple spoiled gradient echo sequence where each excitation is used to scan one line in k-space via a gradient echo with the apropriate phase encoding. The flip angle is the Ernst angle for the given T1 (to obtain maximum SNR).
Multi-slice MDEFT sequence for high-contrast T1-weighted images (DG Norris, J Magn Reson Imag 11:445-451 (2000)).
A simple onepulse experiment (non-selective RF pulse + acquisition).
Navigator which acquires three orthogonal sets of slices.
EPI-based Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction (PROPELLER) sequence. See for example J. G. Pipe, Magn. Reson. Med. 42:963-969 (1999)
A method to measure proton density, T1, T2, and frequency offset. T1 maps and proton density maps are acquired using a Look-Locher sequence. T2 maps are acquired using a CPMG sequence whereby each echo train acquires one line in k-space for all TEs. Field maps are acquired using a spoiled gradient-echo sequence with different TEs. B1 maps are acquired as described in Dowell et al., Magn Reson Med 58 (2007). Maps are generated automatically by the reco method in this sequence module.
Segmented 2D/3D RARE (Turbo SE) Sequence. Phase correction is possible by using a prescan with phase-encoding gradients switched off.
This method can be used to measure the spatial reference gain for the pulse power, i.e. the spatial distribution of B1 for a given setup. This is done by applying RF pulses with different field strength followed by an EPI readout. The oscilation of the image intensity due to the different flip angles is then used to calculate the reference gain.
A simple sequence with different spiral k-space trajectories. Optionally, a fieldmap can be acquired prior to the actual scan which will be used for conjugate-phase multi-frequency reconstruction.
Fully flow-compensated FLASH sequence for Susceptibility Weighted Imaging.
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if you need professional support with ODIN,
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please do not hesitate to contact me (Thies Jochimsen).
ODIN is published under the terms of the GNU General
ODIN is a framework for research purposes only.
It is not certified for clinical use.
Hence, it cannot replace approved solutions from commercial manufacturers.