Simple as that, ntfs-3g does the magic:
root@ubuntu:/home/partimag/2015-10-22-15-img# ntfs-3g sda4.iso /dir-to-mount-location/
This example is somehow correlated with http://cybersec-linuxhorizon.blogspot.ro/2015/10/partclone-v0273-bug.html
Do not try to mount as loop (mount -o loop) because is not working...