Because the adolescent feels like they can do whatever they want so they get into bad situations, which can cause a strain in the family.
"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 MRIimage than a CT."
A. Produces better images of soft tissues