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Scan attestant calculated

computed tomography more commonly known as ct is a diagnostic procedure that plays a vital role in medicine it provides a crystal clear view and answers many clinical questions often within seconds ct picks up even the slightest pathological changes and helps characterize soft tissue how does it work let's take a closer look [Music] unlike conventional x-rays ct scans take multiple images in succession each time of a different layer of the body these are used to create two-dimensional sectional images in various shades of grey bones appear bright because they transmit very little x-ray radiation the procedure is painless and usually takes just a few minutes ct scans are taken after an accident a heart attack or a stroke for example to clarify exactly what happened and what has to be done first they also determine the size and location of a tumor and the probable success or failure of a treatment ct scans can also visualize very clearly the blood vessels in the brain and heart and indicate where deposits have made these dangerously narrow during a ct scan the patient lies on a table that then slides into the scanner as the patient enters the scanner the integrated x-ray source rotates continuously emitting x-rays that penetrate a given part of the body from every angle organs and tissues in the body attenuate the x-rays to different degrees the rays that pass through the body hit detectors and are converted into electronic signals these signals allow the computer to calculate an image two x-ray tubes make the sectional images in half the time so it's even possible to get a clear image of a rapidly beating heart on the basis of the 2d or 3d images the radiologists reach a diagnosis they then discuss the findings and therapy recommendations with their medical colleagues before the scan it may be necessary to administer an agent that increases contrast in the images a so-called contrast medium this makes it easier to differentiate between different tissue structures blood vessels tumors and inflammations are imaged more precisely and diseases are detected earlier and more reliably nowadays almost all patients can be examined using ct that includes those who find it difficult to lie still during a scan age height and weight are no longer a factor however because of radiation exposure pregnant women should only be examined with a ct scan if the diagnosis cannot be made any other way today the average radiation dose from a ct scan is low on average it equals the amount of natural radiation from the environment that a person is exposed to in a year this low dose has been achieved through various technological advances nowadays it's even possible to take ct scans with the radiation dose of a single conventional x-ray image ct scans not only visualize the body's anatomy they also increasingly inform the doctor about the characteristics of the tissue this additional information is important for deciding on the therapy but...