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Flashcards in imaging in inflammatory disorders Deck (9)
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1

how PET scans work

patient is given a radioactive tracer ( eg. FDG ) this is metabolised by the body, structures in the body that have the highest rate of metabolism will show up brightest on the scan.

2

Ideal isotope for labelling

-half-life similar to length of examination
-gamma emitter
-easy to bind to pharmaceutical component
-easily accessable

3

detection of gamma radiation i gamma camera

gamma radiation is emitted from the body and hits a scintillator, a computer then converts the information from the scintillator into a digital image

4

detection of gamma rays in PET scan

detectors on opposite sides of a ring around the patient, rotates and detects gamma emmission, this info is converted to an image by a computer.

5

detection of gamma rays in SPECT

CT version of nuclear medicine, gamma cameras rotate around patient, converted to image by computer.

6

equivalent period of background radiation for head CT

1 year

7

equivalent period of background radiation for chest CT

3.6 years

8

equivalent period of background radiation for barium enema

3.2 years

9

examples of where imaging used

imaging is used in the diagnosis and monitory of progression and treatment of conditions such as:
-rheumatoid arthritis ( inflammation of joints caused by autoimmunity)
- aortitis
-ulcerative colitis (inflammation of inner lining of colon causing ulcers)