If there is MRI, why not eliminate CT and do it all for economic benefits?

Although the difference of human soft tissue density is small, although the absorption coefficient is mostly close to water, it can also form contrast and image. This is the outstanding advantage of CT. Therefore, CT can better display the organs composed of soft tissues, such as brain, spinal cord, mediastinum, lung, liver, gallbladder, pancreas and pelvic organs, and display the images of lesions on a good anatomical image background.