Introduction

odinepi
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.

odinfisp
Single-shot TrueFISP (balanced SSFP) sequence. See for example Scheffler et.al. Eur Radiol (2003) 13:2409-2418

odingrech
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).

odinmdeft
Multi-slice MDEFT sequence, c.f. DG Norris, J Magn Reson Imag 11:445-451 (2000). The sequence can be operated in two modes: In Anatomy mode, parallel slices are imaged. In Pilot mode, three orthogonal slices are imaged in an interleaved fashion.

odinonep
A simple onepulse experiment (non-selective RF pulse + acquisition).

odinquant
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.

odinrare
Segmented 2D/3D RARE (Turbo SE) Sequence. Phase encoding is performed in a center-out scheme. Phase correction is possible by using a prescan with phase-encoding gradients switched off.

odinrefg
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.

odinspir
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.

odinswi
Sequence for Susceptibility Weighted Imaging.

Feedback

If you have any questions, bug-reports or improvements, if you need professional support with ODIN, or if you know how to make a better web page than this, please do not hesitate to contact me (Thies Jochimsen) or post your request on the mailing list.

Licensing

ODIN is published under the terms of the GNU General Public License.