A15-year-old girl tells the school nurse that all of her friends have started their periods and she feels abnormal because she has not. which response is best for the nurse provide

It is normal to start anywhere between 11 and 17 years old.

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.