X-rays were discovered in 1895 by Roentgen. They are generated when electrons are bombarded onto a metal anode target inside an x-ray tube, producing electromagnetic radiation with characteristic wavelengths depending on the metal. The x-ray tube converts electrical energy into x-ray photons and heat, and the output can be controlled by adjusting voltage and current. X-rays can pass through, scatter from, or be absorbed by the body, and are used in medical imaging due to being quick, painless, and able to diagnose diseases and injuries.

1. Introduction to x-rays and
x-ray tube
Engr Khaleeque Ahmed
Sir syed university of engineering &
technology Karachi

2. 700 to 104 nm
400 to 700 nm
10 to 400 nm
10-1 to 10 nm
10-4 to 10 -1 nm
X-ray radiation was discovered by
Roentgen in 1895.
X-rays are generated by bombarding
electrons on an metallic anode
Emitted X-ray has a characteristic
wavelength depending upon which
metal is present.
NMR
10 um - 10 mm

3.  X-rays: a form of electromagnetic energy
 Travel at the speed of light
 Electromagnetic spectrum
 Gamma Rays X-rays
 Visible light Infrared light
 Microwaves Radar
 Radio waves

4.  X-rays radiations are created by taking energy from
electrons & converting into photons
 This energy conversion takes place within the x ray
tube
The x-radiation produced can be controlled by
adjusting the electrical quantity(KV,mA)

5.  X-rays can:
 Pass all the way through the body
 Be deflected or scattered
 Be absorbed
Where on this image
have x-rays passed
through the body
to the greatest degree?

6.  This is a modern rotating anode x-ray
tube. It is encased completely
in a metal protective housing.
There are two principle parts:
• The rotating anode
• The cathode

7.  It’s a energy converter
 Receive energy and converted into
two other form that is heat and x
radiations
 These are designed because of
massive prodution of x rays

8. Quick and painless
Can help diagnose
various diseases and
injuries, including
broken bones, cancer
and infections
Very small increased risk
of cancer in future from
exposure to ionising
radiation(x-rays).
Risk is greater for
children