Year 12s: what will be the first way you research your future options? >>

MRI scans

could someone explain how resonance is used in MRI scans please? the book says it uses resonance but doesnt actualy explain how!

thanks

Reply 1

g33k b0y

The radio waves that are sent into the sample placed in the magnetic field, are of the resonance frequency (also called teh lamour frequency) of the hydrogen nuclei, this forces some of them to achieve the higher energy state ("flip")

wat board is this?

mackin boi

wat board is this?

looks like OCR forces fields and energy or OCR Health Physics to me.

Reply 4

g33k b0y

its OCR health physics, i did it in january

Reply 5

sarah12345

im doin FFE it just mentions it in the book n i think u have to know it as an example of use of resonance

Reply 6

sena168

MRI uses the frequency that matches the natural frequency of the Hydrogen atom to excite it to higher energy state. And they will align to the magnetic field (or sth) When the scanner is turned off, the excited hydrogen atom will re-radiate out the excess energy in the form of radiation (scanners picks it up) to fall back to it's original level.