I'm excited to see these responses. New to the forum minutes ago, and I know this is an old thread, but I came here with the same question (I am lay-person with this technology, but deepening my knowledge). Storz shows a regular radial ESWT handle and impact head being used to treat mid-upper back in this video (at 1:35):
I'd reached out to Storz for discussion, but I think you answered here when explaining the use of radial as opposed to focused. THANK YOU!!!