+// Image Position (Patient) (0020,0032) VM=3
+// -->
+// The attribute Patient Orientation (0020,0020) from the General Image Module
+// is of type 2C and has the condition Required if image does not require
+// Image Orientation (0020,0037) and Image Position (0020,0032).
+// However, if the image does require the attributes
+// - Image Orientation (Patient) (0020,0037), VM=6
+// - Image Position (Patient) (0020,0032), VM=3
+// then attribute Patient Orientation (0020,0020) should not be present
+// in the images.
+//
+// Remember also :
+// Patient Position (0018,5100) values :
+
+// HFS = Head First-Supine, where increasing (positive axis direction) :
+// X -> to the direction pointed to by the patient's oustretched left arm
+// Y -> to the anterior-to-posterior direction in the patient's body
+// Z -> to the feet-to-head direction in the patient's body
+
+// HFP = Head First-Prone, where increasing (positive axis direction) :
+// X -> to the direction pointed to by the patient's oustretched left arm
+// Y -> to the anterior-to-posterior direction in the patient's body
+// Z -> to the feet-to-head direction in the patient's body
+
+// FFS = Feet First-Supine, where increasing (positive axis direction) :
+// X -> to the direction pointed to by the patient's oustretched left arm
+// Y -> to the anterior-to-posterion direction in the patient's body
+// Z -> to the feet-to-head direction in the patient's body
+
+// FFP = Feet First-Prone, where increasing (positive axis direction) :
+// X -> to the direction pointed to by the patient's oustretched left arm
+// Y -> to the posterior-to-anterior direction in the patient's body
+// Z -> to the feet-to-head direction in the patient's body
+
+// HFDR = Head First-Decubitus Right
+// HFDL = Head First-Decubitus Left
+// FFDR = Feet First-Decubitus Right
+// FFDL = Feet First-Decubitus Left
+
+// we can also find (non standard!)
+
+// SEMIERECT
+// SUPINE
+
+// CS 2 Patient Orientation (0020 0020)
+// When the coordinates of the image
+// are always present, this field is almost never used.
+// Better we don't trust it too much ...
+// Found Values are :
+// L\P
+// L\FP
+// P\F
+// L\F
+// P\FR
+// R\F
+//
+// (0020|0037) [Image Orientation (Patient)] [1\0\0\0\1\0 ]
+
+