Whether it is a CT scan or an MRI bone scan, it is important to note that there should be no metal in the body because metal will produce artifacts in the local scan location, especially the closer the scan location, the more the metal will affect the results of the specific scan because it is affecting the imaging imaging. It is also important to note that when doing an MRI scan, there should be no pacemakers or dentures or metal rings in the body. Having a pacemaker can cause damage to the pacemaker and lead to corresponding problems in the human heart, while having contraceptive rings or dentures in the body can have a certain impact on imaging. When doing bone scans, especially MRI scans, patients with high blood pressure and heart disease are avoided as much as possible because the MRI produces a relatively loud noise during the scanning process, which makes people have a feeling of depression, and patients with heart disease can’t stand being in this environment for a long time.