MRI questions

I have a question about my MRI findings. The summary states “solidary left periventricular focus of T2 prolongation in white matter anteriorly” with "second small lesion in left periatrial region’

I am wondering where the periatrial region is located and is this a common location for an ms lesion? I have read many articles stating the periventricular area is common but cannot seem to find anything about the periatrial region.

I have many neurological symptoms that could point to MS but am not close to a dx.