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Table 2 Intra- and inter-reader coefficients of variation using the guided VOI [median (range)]

From: Towards standardization of 18F-FET PET imaging: do we need a consistent method of background activity assessment?

Intra-reader variabilities

 Overall group

1.10% (0.52–2.36%)

 Reader #1

1.06% (0.74–1.77%)

 Reader #2

0.81% (0.66–0.99%)

 Reader #3

1.06% (0.74–1.31%)

 Reader #4

1.73% (1.13–2.36%)

 Reader #5

1.00% (0.70–1.75%)

 Reader #6

0.93% (0.52–1.57%)

Inter-reader variabilities

 Overall group

1.19% (0.84–1.89%)