No there is no MRI scan that says "you have schizophrenia." But there are a lot of thoughts about the relationship between trauma and the experiences that people diagnosed with schizophrenia have, and but this is often ignored for any neurological or scientific 'evidence.'
There's research apparently showing grey matter loss in some people diagnosed with schizophrenia. I got a lot of thoughts about what I've just read, but I won't go into it. You could use google and see what you think.