View
54
Download
0
Category
Tags:
Preview:
DESCRIPTION
X-rays and their ability to. The production, properties and interaction of X- rays Dr. D. Mladenova Maxillo Facial & Radiology Div. WITS DENTAL SCHOOL. Properties of X-rays. X-Rays were discovered by Roentgen in 1895 They are part of electromagnetic spectrum and are invisible - PowerPoint PPT Presentation
Citation preview
The production, properties and interaction of X- rays
Dr. D. MladenovaMaxillo Facial & Radiology Div.WITS DENTAL SCHOOL
Properties of X-rays
• X-Rays were discovered by Roentgen in 1895X-Rays were discovered by Roentgen in 1895
•They are part of electromagnetic spectrum and They are part of electromagnetic spectrum and are invisibleare invisible
• X- rays are described as consisting of wave X- rays are described as consisting of wave packets of energy.packets of energy.
Each packet is called a photon and is equivalent Each packet is called a photon and is equivalent to one quantum of energy.to one quantum of energy.
• Longer X-rays have less penetrating power
• The energy carried by x-rays can be attenuated by matter i.e absorbed or scattered
• 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
Dental X-ray generating Dental X-ray generating equipmentequipment
• A tubeheadA tubehead• Positioning armPositioning arm• A control panel and circuitryA control panel and circuitry
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
Production of x-rays on atomic level
Main features and requirements of an x-ray tube
Heat producing collisions
X-Ray producing collision
Heat producing collisions
Interactions of X-Rays with matter
Scattering
Absorption
Attenuation
Ionization
Photo electric effect
Compton effect
Recommended