PulseDesigner submodule

[cncastillo]

Inspired on Pulseq we need to add a submodule with common pulse sequence blocks.

General

• [x] Read Pulseq.
• [ ] #152

PulseDesigner

:information_source: IMPORTANT

The main difference between these functions and the constructors is the use of the Scanner object. Examples: If $G_\max$ is too low it will make the block longer, Add a delay after the RF blocks to satisfy the ring-down time, etc.

RF

• [ ] makeBlockPulse (Hard pulse, partially implemented)
• [ ] makeSincPulse
• [ ] makeGaussPulse (for fat-sat)
• [ ] makeSLRPulse
• [ ] makeArbitraryRf

  Grad

• [ ] makeTrapezoid
• [ ] makeArbitraryGrad
• [ ] makeExtendedTrapezoid
• [ ] makeSpiral?

  ADC

• [ ] makeAdc

The submodule could be the same as the one for gradient optimization.

[cncastillo]

The functions to be implemented should be: Pulseq aux functions

A basic prototype is being made in the submodule PulseDesigner.

[cncastillo]

I think in particular I think it is very important to allow the use of

• 139

As a reminder of what we talked in an internal Koma meeting

The idea would be to have an equivalent of

seq.addBlock(rf,gx,gy,adc,delay)

but in a more Julian way

seq += [rf,gx,gy,adc,delay]

where rf::RF<:MRIEvent, g::Matrix{Grad}<:MRIEvent, adc::<:MRIEvent, and delay::Delay<:MRIEvent.

A simple example that could be helpful for this:

julia> struct MyType
           a
       end

julia> struct MyType2
           a
       end

julia> import Base.+

julia> x::MyType + ys::AbstractVector{MyType2} = MyType(x.a + sum([y.a for y in ys]))

julia> MyType(1) + [MyType2(1) for i = 1:3]