+
+/// \brief We have to deal with 4 *very* different cases :
+/// -1) user created ex nihilo his own image and wants to write it as a Dicom image.
+/// USER_OWN_IMAGE
+/// -2) user modified the pixels of an existing image.
+/// FILTERED_IMAGE
+/// -3) user created a new image, using existing images (eg MIP, MPR, cartography image)
+/// CREATED_IMAGE
+/// -4) user modified/added some tags *without processing* the pixels (anonymization...
+/// UNMODIFIED_PIXELS_IMAGE
+
+ void SetContentType (ImageContentType c) { ContentType = c; }
+ // no GetContentType() method, on purpose!
+
+ void CallStartMethod();
+ void CallProgressMethod();
+ void CallEndMethod();
+