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Physics and equipment
- Author: Ruth Dennis
- From: BSAVA Manual of Canine and Feline Radiography and Radiology
- Item: Chapter 1, pp 1 - 20
- DOI: 10.22233/9781910443187.1
- Copyright: © 2013 British Small Animal Veterinary Association
- Publication Date: January 2013
Abstract
X-rays are produced by X-ray machines when electricity from the mains is transformed into a high voltage current, following which some of the energy in the current is converted to X-ray energy. The intensity and penetrating power of the emergent X-ray beam varies with the size and complexity of the apparatus and the exposure settings used. Portable X-ray machines are capable only of a relatively low output, whereas larger machines are far more powerful. X-rays form part of the electromagnetic spectrum, which defines different types of radiation by wave-length and frequency. X-rays have some additional properties which mean that they can be used to create images of the internal structures of biological material. The chapter covers the Production of X-rays; Interaction of X-rays with tissues; Recording and displaying the image.
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