recovering an overwritten ntfs partition with dd command

I accidentally overwrote an NTFS partition with an iso image with the dd command. I am trying to recover NTFS partition with testdisk, but after disk selection (1.8TB), partition table type selection (intel) and analysis, I get the following current partition structure: At this point I don't know what to do to go on and recover the NTFS partition that I don't see. Should I choose the HFS line? Please help me.