A one step more advanced machine than x-ray is CT scanner machine. This machine takes cross-sectional images of body organs making use of rotating X-ray machines and computers. The bones, blood vessels and tissues of different body organs can be imaged by this machine. The diagnostic centers use this scanning machine to scan head, abdomen, chest, spine, etc. This scanning is necessary prior to surgeries. It can also be used to diagnose fractures in bones and disorders in muscle. The models of the CT scanner machine are Toshiba Aquilion 64, Philips Brilliance 64, Toshiba Alexion 16 Slice and Ge Lightspeed Qxi - 4 Slice.