X-ray/CT Technique
The basic principles about the X-ray and CT technique.
X-ray Image
How is an X-ray image produced?
What happens when the X-rays pass through the body; how is an X-ray image actually created? Answer: the technology of an X-ray image is based on the attenuation that occurs when X-rays pass through matter, in this case the human body. This attenuation is caused by the absorption and scattering of photons. Depending on the type of tissue/matter, a certain amount of X-rays will pass through (= ‘transmission’) and a certain amount will be attenuated. Attenuation can be considered the opposite of transmission (HIGH attenuation results in LOW transmission and vice versa).
The property of X-ray attenuation (weakening) is used in the production of X-ray images and can be described in a formula; see Figure 7.
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Text & Illustrations
Drs. A. van der Plas, MSK radiologist Maastricht UMC+
With special thanks to:
Drs. S. Springer, Medical Physicist Assistant Maastricht UMC+
Sources:
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10/07/2023
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