I have encountered a similar problem about iPhone backup before.
1.Copy all pictures from your current NTFS formatted drive C:\Documents\Pictures to F:\Pictures (or to a directory of your choice)
2.Open iTunes and select the new folder that you want to use to sync photos to your iPhone – F:\Pictures
3.Sync your iPhone and everything should work smoothly.
Besides what mentioned above, i like to share you a iPhone column about iPhone Transfer Backup Reviews, which included transferring iPhone contents to computer/iTunes.
Hopefully this works for all of you like it just worked for me!