Final answer:
MRI is less effective than x rays for detecting breaks in bone and imaging breast tissue, so the two diagnostic tools complement each other.
Step-by-step explanation:
MRI is less effective than x rays for detecting breaks in bone and imaging breast tissue, so the two diagnostic tools complement each other. While MRI images are superior to x rays for certain types of tissue and have none of the hazards of x rays, they do not completely supplant x-ray images. MRI images are also expensive compared to simple x-ray images and tend to be used most often where they supply information not readily obtained from x rays.