imgFormatFromFName() identifies common microPET extensions

v2/libtpcimage/imageio.c

@@ -387,7 +387,7 @@ int imgWrite(
     separated by file naming.
 
    @returns enum imgformat (IMG_FORMAT_DICOM, ...), and IMG_FORMAT_UNKNOWN, when not certain.
-   @sa imgRead, imgWrite
+   @sa imgFormatIdentify, imgRead, imgWrite, micropetExists, niftiExists, anaExists
  */
 imgformat imgFormatFromFName(
   /** Name of file that is used to determine format. */
@@ -442,6 +442,11 @@ imgformat imgFormatFromFName(
 
   if(strcasecmp(exts, ".img")==0) return(IMG_FORMAT_E63);
 
+  if(strcasecmp(exts, ".pet.img")==0) return(IMG_FORMAT_MICROPET);
+  if(strcasecmp(exts, ".pet.img.hdr")==0) return(IMG_FORMAT_MICROPET);
+  if(strcasecmp(exts, ".ct.img")==0) return(IMG_FORMAT_MICROPET);
+  if(strcasecmp(exts, ".ct.img.hdr")==0) return(IMG_FORMAT_MICROPET);
+
   /* Check certain in-house extensions */
   if(strcasecmp(exts, ".bin")==0) return(IMG_FORMAT_FLAT);
   if(strcasecmp(exts, ".mif")==0) return(IMG_FORMAT_FLAT);
@@ -453,6 +458,7 @@ imgformat imgFormatFromFName(
 /*****************************************************************************/
 /** Identify the string representation of the IMG file format.
     @return enum imgformat, or 0 (enum IMG_FORMAT_UNKNOWN) if not identified.
+    @sa imgFormatFromFName
     @author Vesa Oikonen
  */
 imgformat imgFormatIdentify(