your best friend refuses to go out because she is afraid that she will say or do the wrong thing. social situations make her heart rate accelerate and she tends to avoid shopping malls, public transportation, tunnels, and restaurants. your friend may be suffering from:

Your friend may be suffering from social anxiety

Your friend may be suffering from panic disorder

Agonist is the answer i believe

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.