diff --git a/KomaMRIBase/src/KomaMRIBase.jl b/KomaMRIBase/src/KomaMRIBase.jl
index 739b7e44e..0eca34c48 100644
--- a/KomaMRIBase/src/KomaMRIBase.jl
+++ b/KomaMRIBase/src/KomaMRIBase.jl
@@ -45,8 +45,8 @@ export brain_phantom2D, brain_phantom3D, pelvis_phantom2D
 export get_dims
 # Motion
 export MotionModel
-export SimpleMotion, NoMotion, ArbitraryMotion
-export SimpleMotionType
+export NoMotion, SimpleMotion, ArbitraryMotion
+export SimpleMotionType, SimpleMotionTypes
 export Translation, Rotation, PeriodicTranslation, PeriodicRotation
 export get_spin_coords, get_times
 export LinearInterpolator
diff --git a/KomaMRIBase/src/datatypes/phantom/motion/SimpleMotion.jl b/KomaMRIBase/src/datatypes/phantom/motion/SimpleMotion.jl
index c2b4eab5e..13db2586b 100644
--- a/KomaMRIBase/src/datatypes/phantom/motion/SimpleMotion.jl
+++ b/KomaMRIBase/src/datatypes/phantom/motion/SimpleMotion.jl
@@ -1,4 +1,9 @@
-# ------ SimpleMotionType
+# ------ SimpleMotionTypes
+global SimpleMotionTypes = ["Translation", 
+                            "Rotation", 
+                            "PeriodicTranslation", 
+                            "PeriodicRotation"]
+                            
 abstract type SimpleMotionType{T<:Real} end
 
 """
diff --git a/KomaMRIFiles/src/Phantom/Phantom.jl b/KomaMRIFiles/src/Phantom/Phantom.jl
index e5334b880..8ef3bea31 100644
--- a/KomaMRIFiles/src/Phantom/Phantom.jl
+++ b/KomaMRIFiles/src/Phantom/Phantom.jl
@@ -79,9 +79,9 @@ function import_motion(Ns::Int, motion_group::HDF5.Group, precision::Type)
         for key in keys(types_group)
             type_group = types_group[key]
             type_str = match(r"^\d+_(\w+)", key).captures[1]
-            type = type_str == "Translation" ? Translation :
-                   type_str == "Rotation" ? Rotation : 
-                   nothing
+            if type_str in SimpleMotionTypes 
+                type = eval(Meta.parse(type_str)) # Use of eval is controlled
+            end
             args = []
             for key in fieldnames(type)
                 push!(args, read_attribute(type_group, string(key)))
@@ -178,10 +178,10 @@ function export_motion(motion_group::HDF5.Group, motion::SimpleMotion)
     types_group =  create_group(motion_group, "types")
     counter = 1
     for type in motion.types
-        type_group = create_group(types_group, string(counter)*"_"*match(r"^\w+", string(typeof(type))).match)
+        type_group = create_group(types_group, string(counter)*"_"*match(r"(?<=\.)[^\{\}]+", string(typeof(type))).match)
         fields = fieldnames(typeof(type))
         for field in fields
-            HDF5.attributes(type_group)[string(field)] = getfield(type, fieldcount)
+            HDF5.attributes(type_group)[string(field)] = getfield(type, field)
         end
         counter += 1
     end