1
Q
What energy of photons are emitted by the radionuclide FDG?
A
511keV
2
Q
What energy of photons is emitted by technetium-99?
A
140keV
3
Q
What is the science name for the F-18 FDG radiotracer?
A
2-[fluorine-18]fluoro-2-deoxy-d-glucose
4
Q
What is the difference between a ‘voxel’ and a ‘pixel’?
A
Voxels are volume elements - small cubical segments of the body being imaged (aka the ‘imaged matrix’)
Pixels are picture elements - small squares of variable brightness on a flat monitor that correlate to a voxel
A voxel associated with greater signal intensity/x-ray attenuation will be displayed as a brighter/whiter pixel
Rad Onc
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