Medical Application of Physics
- Created by: Ruby
- Created on: 24-04-13 20:07
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- Medical Application of Physics
- X-Rays
- Part of the Electromagnetic Spectrum
- Short wavelength
- Cause ionisation
- Affect a photographic film in the same way as light
- Absorbed by Metal and Bone
- High doses can kill living cells. Low doses can cause cell mutation and cancerous growth.
- Transmitted by a healthy tissue
- Wavelength is of the same order of magnitude as the diameter of an atom
- Used for Medical Purposes
- CT Scans, Bone Fractures, Dental Problems and killing Cancer Cells
- The use of charge-coupled devices (CCDs) allow images to be formed electronically
- Precautions should be taken when X-ray Machines and CT scanners are in use
- Ultrasound
- The range of human hearing is about 20hz-20,000hz
- Electronic systems can be used to produce ultrasound waves which have a frequency higher than the upper limit of hearing for humans
- Partially reflected when they meet a boundary between two different media
- The time taken for the reflections to reach a detector can be used to determine how far away such a boundary is
- Distance between interfaces in various media: s = v x t
- Can be used for medical purposes
- Prenatal scanning
- Removal of Kidney Stones
- X-Rays
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