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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%)