Computed tomography is a useful diagnostic tool for detecting diseases and injuries. It uses a series of X-rays and a computer to generate 3D images of soft tissues and bones. Computed tomography is a painless and non-invasive diagnostic method. Different types of CT machines have different functions, like ct chest scan machine for chest checking, heart ct scan machine for heart checking, ct brain machine for brain checking and eye ct scan machine for eye checking, etc. that depends.