Table 2 Inter- and intra-observer variation in centreline length annotation (mm and %, provided as median [IQR])

HATS-1 2D (ED)

Intra-observer

2.3 [1.0–3.3], 1.8 [0.8–2.7]%

1.1 [0.4–1.6], 1.0 [0.3–1.5]%

2.6 [1.5–4.5], 1.1 [0.6–1.9]%

Inter-observer

5.2 [3.4–7.9], 4.1 [2.7–5.8]%

0.7 [0.4–2.0], 0.7 [0.4–1.8]%

5.8 [3.1–8.0], 2.5 [1.5–3.5]%

CoA 2D

Intra-observer

2.7 [1.2–4.8], 2.4 [0.9–4.4]%

1.1 [0.5–1.7], 1.1 [0.4–1.7]%

2.8 [1.7–3.9], 1.2 [0.7–1.9]%

Inter-observer

5.6 [3.7–7.7], 5.2 [3.4–6.9]%

2.1 [0.8–4.1], 1.6 [0.7–3.1]%

4.8 [2.8–6.9], 2.1 [1.2–3.2]%

HATS-1 3D

Intra-observer

0.9 [0.4–1.5], 0.8 [0.3–1.2]%

0.2 [0.1–0.4], 0.2 [0.1–0.3]%

0.9 [0.5–1.5], 0.4 [0.2–0.7]%

Inter-observer

0.8 [0.4–2.1], 0.7 [0.3–1.7]%

0.4 [0.2–0.5], 0.4 [0.2–0.5]%

1.3 [0.5–2.5], 0.6 [0.2–1.2]%

bSSFP CoA 3D

Intra-observer

1.2 [0.5–2.1], 1.0 [0.5–1.7]%

0.2 [0.1–0.5], 0.2 [0.1–0.4]%

1.3 [0.6–2.5], 0.6 [0.3–1.0]%

Inter-observer

2.3 [1.5–3.9], 2.0 [1.3–3.2]%

0.7 [0.3–0.9], 0.7 [0.2–1.1]%

2.8 [1.6–4.7], 1.4 [0.7–1.8]%

CE-MRA CoA 3D

Intra-observer

0.9 [0.3–1.7], 0.8 [0.3–1.8]%

0.3 [0.1–0.7], 0.3 [0.1–0.6]%

1.0 [0.5–1.9], 0.4 [0.2–0.7]%

Inter-observer

2.9 [1.7–5.6], 2.5 [1.5–4.6]%

0.8 [0.3–1.5], 0.6 [0.2–1.2]%

3.0 [0.8–6.5], 1.4 [0.4–2.8]%