KomaMRI.jl: An open-source framework for general MRI simulations with GPU acceleration

KomaMRI v0.10.1

Diff since v0.10.0

More pre-ISMRM goodies!!😁

This release brings the new simulation, Pulseq, RF-frame, plotting, and documentation improvements. It includes Magnus-based Bloch solvers, stricter Pulseq timing checks, RF/ADC event deduplication fixes, RF frequency-modulation phase fixes, improved RF/FM plotting, clearer simulation block splitting for GPU memory control, and new documentation for the Magnus methods.

Compatibility

• Requires KomaMRICore 0.11.
• Requires KomaMRIPlots 0.11.
• Compatible with KomaMRIFiles 0.10 and KomaMRIBase 0.11 through dependencies.

Features and Fixes

• Adds access to BlochMagnus1, BlochMagnus2, and BlochMagnus4.
• Picks up RF rotating-frame simulation fixes for frequency-modulated RF pulses.
• Picks up stricter Pulseq check_timing validation for RF/ADC dead time, RF ringdown, extension durations, and duplicate TRIGGERS / ROTATIONS.
• Picks up stricter write_seq behavior: block durations are no longer silently stretched when timing checks are enabled.
• Picks up RF/ADC Pulseq event deduplication fixes, reducing repeated RF/ADC event rows in phase-cycled sequences.
• Picks up improved RF AM/FM plotting, including Δf_FM and ψ_FM.
• Keeps UI progress-window integration in KomaMRI through simulation callbacks.
• Adds documentation for Magnus Bloch methods and improves generated-docs hygiene.

Merged pull requests:

• Magnus-based methods, RF reference frame, and block splitting (#612) (@cncastillo)
• Fix ADC Pulseq raster timing (#756) (@cncastillo)
• Fix GPU signal sampling during excitaiton (KomaMRICore v0.11) (#757) (@cncastillo)
• Add start and end points to the sequence time points calculated by KomaMRIBase.get_variable_times (#759) (@JanWP)
• Pulseq deadtime and block timing checks + event dedup (#760) (@cncastillo)
• Document Magnus Bloch methods (#761) (@cncastillo)

Closed issues:

• Add 2nd-order Runge Kutta for RF excitation (#201)
• BlochDict simulation method not working with multiple threads (#204)
• Troubles at beginning of blocks in BlochDict simulations (#583)
• bSSFP signal is dependent on isochromats' position along the z axis even after having applied RF.freq_offset (#657)
• get_variable_times throws BoundsError for pure Delay sequences (#758)