From 559e2e4a96ce4e85bc0ad19159a2b16d98a16daa Mon Sep 17 00:00:00 2001
From: Michiel Cottaar <MichielCottaar@protonmail.com>
Date: Tue, 30 Jul 2024 16:07:08 +0100
Subject: [PATCH] Add empty block after gradient/spin echo to increase TR
---
src/sequences/gradient_echoes.jl | 1 +
src/sequences/spin_echoes.jl | 3 +++
2 files changed, 4 insertions(+)
diff --git a/src/sequences/gradient_echoes.jl b/src/sequences/gradient_echoes.jl
index ab9ec7e..a70fe11 100644
--- a/src/sequences/gradient_echoes.jl
+++ b/src/sequences/gradient_echoes.jl
@@ -34,6 +34,7 @@ function GradientEcho(; excitation=(), readout=(), optim=(), resolution=nothing,
:excitation => excitation_pulse(; slice_thickness=slice_thickness, excitation...),
nothing,
:readout => readout_event(; extra_readout_params..., readout...),
+ nothing
]; name=:GradientEcho, variables...)
end
end
diff --git a/src/sequences/spin_echoes.jl b/src/sequences/spin_echoes.jl
index 8ecdea4..0e4a7c7 100644
--- a/src/sequences/spin_echoes.jl
+++ b/src/sequences/spin_echoes.jl
@@ -38,6 +38,7 @@ function SpinEcho(; delay=0., excitation=(), refocus=(), readout=(), optim=(), s
:refocus => refocus_pulse(; slice_thickness=slice_thickness, refocus...),
nothing,
:readout => readout_event(; extra_readout_params..., readout...),
+ nothing
]; name=:SpinEcho, delay=delay, variables...)
end
end
@@ -56,6 +57,8 @@ end
echo_time(sequence)
Returns the echo time of a sequence in ms.
+
+This is typically defined as the time between the excitation pulse and the crossing of k=0 during the MRI readout.
"""
variables.echo_time
--
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