From 4857d8646a8897f4792a208cf2d13e62ae9ef6c2 Mon Sep 17 00:00:00 2001
From: Michiel Cottaar <michiel.cottaar@ndcn.ox.ac.uk>
Date: Thu, 11 Apr 2024 14:49:16 +0100
Subject: [PATCH] Fix docs and enable gradient interface
---
src/sequences/diffusion_spin_echoes.jl | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/src/sequences/diffusion_spin_echoes.jl b/src/sequences/diffusion_spin_echoes.jl
index bc09c6b..aa25866 100644
--- a/src/sequences/diffusion_spin_echoes.jl
+++ b/src/sequences/diffusion_spin_echoes.jl
@@ -2,7 +2,7 @@ module DiffusionSpinEchoes
import ...Containers: Sequence
import ...Parts: excitation_pulse, readout_event, interpret_image_size, Trapezoid, gradient_spoiler, refocus_pulse, dwi_gradients
import ...Containers: start_time
-import ...Variables: get_pulse, get_readout, echo_time, duration_transverse, delay, effective_time, diffusion_time, Δ, TR, TE, repetition_time
+import ...Variables: get_pulse, get_readout, echo_time, duration_transverse, delay, effective_time, diffusion_time, Δ, TR, TE, repetition_time, get_gradient
import ...Pathways: Pathway, get_pathway
import ...BuildSequences: build_sequence
import ...Scanners: Default_Scanner
@@ -14,7 +14,7 @@ const DWI = DiffusionSpinEcho
"""
DiffusionSpinEcho(; echo_time, delay=0., excitation=(), gradient=(), refocus=(), readout=(), optim=(), resolution/fov/voxel_size/slice_thickness, scanner)
-Defines a gradient echo sequence with a single readout event.
+Defines a diffusion-weighted spin echo (Stejskal-Tanner) sequence.
`DWI`, `DW_SE`, and `DiffusionSpinEcho` are all synonyms.
@@ -61,6 +61,7 @@ end
get_pulse(ge::DiffusionSpinEcho) = (excitation=ge.excitation, refocus=ge.refocus)
+get_gradient(ge::DiffusionSpinEcho) = (gradient=ge.gradient, gradient2=ge.gradient2)
get_readout(ge::DiffusionSpinEcho) = ge.readout
get_pathway(ge::DiffusionSpinEcho) = Pathway(ge, [90, 180], 1, group=:DWI)
echo_time(ge::DiffusionSpinEcho) = 2 * (effective_time(ge, :refocus) - effective_time(ge, :excitation))
--
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