Thank you for the response! When I try the solution above using the expression example given, none of my pictures are showing up. I currently have the following in the value field and the pictures will show that are available:

="file:\ocvm-webext\Pictures\"&Fields!STF_ID.Value & ".jpg"

I tried using your example and changed it to:

=System.Convert.FromBase64String(Mid(System.Convert.ToBase64String("file:\ocvm-webext\Pictures\"&Fields!STF_ID.Value & ".jpg"),105))

With this example none of my pictures show up.