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INRT: guidelines 2008

• FDG-PET scans have to be meticulously analysed to detect lymph nodes that

were overlooked on CT imaging (CT assessment can be extremely difficult)

• Any morphological and/or functional asymmetry has to be taken into account

• A decrease in size or the disappearance of initially visible lymph nodes on the

pre-CT scan as compared to the POST-CT scan should be considered as surrogate

proof of initial involvement

• All the radiological procedures should be performed on patients in the treatment

position for proper coregistration

• It is highly advisable that all CT and/or CT/PET scans should be performed

with IV contrast

Girinsky T, R&O 2008