DP Physics (last assessment 2024)
Question 18M.3.HL.TZ2.b.iii
| Date | May 2018 | Marks available | [Maximum mark: 3] | Reference code | 18M.3.HL.TZ2.b.iii |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Compare | Question number | b.iii | Adapted from | N/A |
b.iii.
[Maximum mark: 3]
18M.3.HL.TZ2.b.iii
The attenuation values for fat and muscle at different X-ray energies are shown.
Compare the use of high and low energy X-rays for medical imaging.
[3]
Markscheme
«high energies factors:»
less attenuation/more penetration
more damage to the body
«so» stronger signal leaves the body
OR
«so» used in «most» medical imaging techniques
«low energy factors:»
must be used with enhancement techniques
greater attenuation/less penetration
«so» more damage to the body «on surface layers»
OR
«so» unwanted in «most» medical imaging techniques
[3 marks]
