F222 - 2.1.2.2 detecting lung and breast cancer 3.0 / 5 based on 1 rating ? Human BiologyASOCR Created by: hayley taylorCreated on: 25-11-12 16:25 What do xrays give off? high energy photons 1 of 21 is it hard to for the photons to pass through softer parts of the body? no 2 of 21 What do denser parts of the body do to the photons? absorb them 3 of 21 what produces the x-ray? an electrode 4 of 21 what does the camera do in an x-ray? takes photographic film of the pattern of x-rays passing through the body 5 of 21 What two structures are dense and therefore appear white on the film? bones and tumors 6 of 21 Where is a mammography used? on a breast 7 of 21 What age do the NHS offer a free mammography? 50 years 8 of 21 What is a CT scan also known as? CAT scan (computerised axial tomography) 9 of 21 What shape is a CT scanner? circular 10 of 21 Does a CT scan produce 2D images or 3D images? 3D 11 of 21 What does thermography use? cameras sensitive to infrared radiation 12 of 21 do warmer parts of the body give off more or less infrared radiation? more 13 of 21 Why do cancer cells give off more heat than ordinary cells? because they are dividing more and therefore respiring more 14 of 21 What does ultrasound use to detect tumors? sound waves 15 of 21 What are two advantages of using ultrasounds to other methods? cheaper and more portable 16 of 21 what does MRI scan stand for? magnetic resonance imaging 17 of 21 What does an MRI scan do? measures the magnetic field in different parts of the body 18 of 21 Is this image 3D? yes 19 of 21 What does PET scan stand for? positron emission tomography 20 of 21 In a PET scan the patient is injected with a radioactive substance, what does this release? gamma rays 21 of 21
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