PulseDesigner submodule

[cncastillo]

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

General

• Read Pulseq.
• Write Pulseq files  #152

PulseDesigner

ℹ️ 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

• Unitful.jl to create Sequences, Phantoms, and Scanner types. #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]