Photoelectric vs Compton effect | Visual Explanation

This video contains a simplified, visual explanation of the differences and clinical applications of the Photoelectric and Compton effect.

Summary:
There are two major ways in which diagnostic x-rays interact with tissue.
In the photoelectric effect, a single electron absorbs all the energy of an incident photon, while in the Compton effect, the incident photon only transfers a portion of its energy to an electron.
The photoelectric effect is the dominant type of interaction in materials with higher atomic numbers, such as contrast agents, bone and lead.
Compton scattering is the dominant type of interaction in material with lower atomic numbers, such as human tissue and air.

#Photoelectric #Compton #Xray

Timecodes:
0:00 Introduction
0:19 What is the photo-electric effect?
1:10 What is the compton effect?
1:30 Compton scattering in X-ray imaging (Image quality, dose, background radiation)
1:47 Summary 1
2:03 Photo-electric effect - When?
2:16 Why lead as shielding material?
2:23 Photoelectric vs. Compton vs. Pair production
2:33 Photoelectric effect in X-ray imaging (contrast)
3:05 K-edge
4:11 Summary 2
4:40 The end