Explain inverse_slice_thickness is pulse variable

src/parts/trapezoids.jl

@@ -182,7 +182,7 @@ end
 Base.keys(::SliceSelect) = (Val(:rise), Val(:flat), Val(:pulse), Val(:fall))
 Base.getindex(pg::SliceSelect, ::Val{:pulse}) = (0., pg.pulse)
 
-@defvar inverse_slice_thickness(ss::SliceSelect) = 1e3 * variables.gradient_strength(ss.trapezoid) .* variables.inverse_bandwidth(ss.pulse)
+@defvar pulse inverse_slice_thickness(ss::SliceSelect) = 1e3 * variables.gradient_strength_norm(ss.trapezoid) .* variables.inverse_bandwidth(ss.pulse)
 
 get_pulse(ss::SliceSelect) = ss.pulse
 get_gradient(ss::SliceSelect) = ss.trapezoid