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The production, properties and interaction of X- rays Dr. D. Mladenova Maxillo Facial & Radiology Div. WITS DENTAL SCHOOL X-rays and their ability to.

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Presentation on theme: "The production, properties and interaction of X- rays Dr. D. Mladenova Maxillo Facial & Radiology Div. WITS DENTAL SCHOOL X-rays and their ability to."— Presentation transcript:

1 The production, properties and interaction of X- rays Dr. D. Mladenova Maxillo Facial & Radiology Div. WITS DENTAL SCHOOL X-rays and their ability to

2 Properties of X-rays

3 X-Rays were discovered by Roentgen in 1895 X-Rays were discovered by Roentgen in 1895 They are part of electromagnetic spectrum and are invisibleThey are part of electromagnetic spectrum and are invisible X- rays are described as consisting of wave packets of energy. Each packet is called a photon and is equivalent to one quantum of energy. X- rays are described as consisting of wave packets of energy. Each packet is called a photon and is equivalent to one quantum of energy.

4 Longer X-rays have less penetrating power The energy carried by x-rays can be attenuated by matter i.e absorbed or scattered

5 An X-ray beam is made up of millions of photons of different energies The diagnostic X-ray beam varies in its intensity and guantity The factors affecting the intensity and/or the quantity of the beam are kV, mA, distance from the target, length of exposure, filtration

6 Dental X-ray generating equipment A tubehead A tubehead Positioning arm Positioning arm A control panel and circuitry A control panel and circuitry

7 Ideal requirements Safe and accurate Capable of generating X-rays in the desired range Small Easy to manoeuvre and position Stable Easily folded and stored Simple to operate Robust

8

9 Production of x-rays on atomic level

10 Main features and requirements of an x-ray tube

11 Heat producing collisions

12 X-Ray producing collision

13 Heat producing collisions

14 Interactions of X-Rays with matter

15 Scattering Absorption Attenuation Ionization

16 Photo electric effect

17 Compton effect


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