Dear Marc,

The interaural line is not readily visible in our MRI template, since the bony structures give no signal, so they are invisible unless there is some soft tissue directly attached.

In order to give you a good estimate for the position of the interaural line in Waxholm Space, we are working on aligning a CT (from another animal) to the atlas. I'll get back to you in a couple of days (hopefully) with the results.

Best regards,
Eszter