X-Ray tube in CT

1. 1
Moving Forward with Tradition
Kristjan Qarri, MSE, Introduction into Medical Imaging

2. 2
Modern X-Ray tube In CT
Contents
• CT Scan
• X-Ray tube: Components
• X-Ray tube: How it works
• X-Ray radiation
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE

3. 3
Modern X-Ray tube In CT
• CT Scan
1- Lying bed
2- X-Ray tube
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE
Figure 1. CT Scan for medical diagnosis
daveynin from United States (https://commons.wikimedia.org/wiki/File:UPMCEast_CTscan.jpg) , „UPMCEast CTscan“,
https://creativecommons.org/licenses/by/2.0/legalcode

4. 4
Modern X-Ray tube In CT
• X-Ray tube
1- Electrical Device used for the generation of X-Rays
2- Acceleration and deceleration of the electrons
3- Energy of the X-Rays depend on the Energy of the electrons:
Acceleration voltage < = 120 KV for medial use
4- Anode: Tungsten( Target material, high melting point, high atomic number)
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE

5. 5
Modern X-Ray tube In CT
• X-Ray tube: Components
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE
TheFreeDictionary.com. (2017). X-rays. [online] Available at: http://medical-dictionary.thefreedictionary.com/X-rays [Accessed 28 Jun.
2017].
Figure 2. Standard stationary anode x-
ray tube; diagram in longitudinal section. Fr
omDorland's, 2000.:

6. 6
Modern X-Ray tube In CT
• X-Ray radiation
1- Collision
2- Not enough energy
3- Scattering
(Most of the Kinetic energy is
lost)
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE
Sprawls.org. (2017). [online] Available at: http://www.sprawls.org/ppmi2/XRAYPRO/ [Accessed 28 Jun. 2017].
Figure 3. Energy Exchange within an
X-Ray Tube

7. 7
Modern X-Ray tube In CT
• X-Ray radiation
1- Characteristic photon
2- Bremsstrahlung photon
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE
Sprawls.org. (2017). [online] Available at: http://www.sprawls.org/ppmi2/XRAYPRO/ [Accessed 28 Jun. 2017].
Figure 3. Energy Exchange within an
X-Ray Tube

8. 8
Modern X-Ray tube In CT
• X-Ray Spectrum
E=hf
I=Io exp(-μx)
I~V
Introduction into Medical Imaging 2017-06-28
Kristjan Qarri MSE
Anon, (2017). [online] Available at: http://the spectrum of an X-ray tube with two different voltages - 60 kVp and 100 kVp [Accessed 28
Jun. 2017].
Figure 4. The spectrum of an X-ray tube
with two different voltages - 60 kV and
100 kV

9. 9
Moving forward with tradition
Thank you very much for your attention!

10. 10
Moving forward with tradition
Questions!