Table 4 Area at risk (AAR) by field strength and quantification method and corresponding reproducibilities

Mean value (AAR [% LVM])

34.8 ± 9.8

38.1 ± 13.0

35.4 ± 11.2

35.2 ± 14.4

38.9 ± 9.9^a

30.0 ± 8.2

ICC v Manual

0.865

0.920

0.649

0.465

Mean bias v Manual (±1.96SD LoA)

+0.31 (+12.20, −11.57)

+3.62 (+11.24, −4.00)

+5.13 (+22.76, −12.50)

+8.92 (+23.15, −5.31)

Interobserver ICC

0.908

0.976

0.825

0.869

0.981

0.716

Interobserver mean bias (±1.96SD LoA)

+3.38 (+9.12, −2.37)

+1.26 (+7.20, −4.68)

+1.31 (+17.11, −14.49)

−0.34 (+15.36, −16.03)

−1.35 (+1.64, −4.33)

−5.20 (+9.54, −19.95)

Intraobserver ICC

0.948

0.995

0.977

0.987

0.990

0.826

Intraobserver mean bias (±1.96SD LoA)

+2.80 (+7.28, −1.68)

+0.58 (+3.31, −2.16)

−0.01 (+5.62, −5.64)

+1.00 (+5.50, −3.51)

+0.04 (+2.82, −2.74)

+1.46 (+14.84, −11.93)