Flashcards in Imaging in inflammatory disorders and infection Deck (11)
Loading flashcards...
1
Molecular imaging
Radionuclide imaging eg PET
Radioactive element and pharmaceutical element
2
PET
Cyclotron produced isotopes with extremely short half lives and emit positrons
Bump particles with oxygen rich water and combine with ligand
3
What does PET show?
Physiological function of organs
4
PET tracer
Gamma emitted by positron - emitting radionuclide
5
FDG
Radiotracer used to show tissues that use glucose
6
Ideal isotope for labelling (5)
- Half life similar to length of examination
- Gamma emitter
- Energy 50-300keV
- Readily available radionuclide
- Easily bound to pharmaceutical component
7
Gamma radiation
Occurs due to radioactive decay of unstable isotope and has a high frequency and energy
8
Gamma camera ENERGY
Nuclear => Gamma => light EM => electrical
(nucleus from patient image crystal to display)
9
SPECT
CT version of nuclear medicine ( tracer used)
10
What does SPECT look at?
Brain and cardiac studies using roatating gamma cameras
11
