Determination of a worker's insured status for social security benefits depends upon the? A. workers age
B. number of years worked
C. number of quarters worked
D. workers average annual earnings

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.