Table 1 Population median DSC (A), MSD (B) and HD (C) for all patients of the 4 CT-MR propagations, 3 MR-MR propagations, intra-observer variations (IOV) and their differences (Δ) are shown for each structure

A

CT-MR

MR-MR

IOV

Δ

p-value

Δ

p-value

Δ

p-value

Prostate

0.84

0.90

0.92

−0.07

<  0.001

− 0.08

<  0.001

− 0.02

0.01

SV

0.68

0.76

0.81

−0.08

0.001

−0.3

<  0.001

−0.05

0.05

CTV56

0.84

0.84

0.87

0.0

0.73

−0.03

0.02

−0.03

0.23

Rectum

0.77

0.87

0.95

−0.10

<  0.001

−0.18

<  0.001

− 0.08

0.003

Bladder

0.87

0.92

0.97

−0.05

0.15

−0.10

<  0.001

−0.05

<  0.001

R fem. Head

0.93

0.95

0.95

−0.02

<  0.001

−0.02

0.005

−0.00

0.18

L fem. Head

0.91

0.94

0.94

−0.03

0.007

−0.03

0.002

0.00

0.20

Penile Bulb

0.64

0.79

0.85

−0.15

<  0.001

− 0.21

<  0.001

− 0.06

0.08

B

CT-MR

MR-MR

IOV

Δ

p-value

Δ

p-value

Δ

p-value

Prostate

1.60

1.00

0.88

0.60

<  0.001

0.72

<  0.001

0.12

0.15

SV

1.48

1.17

0.86

0.31

0.002

0.62

0.005

0.31

0.13

CTV56

1.99

1.82

1.58

0.17

0.30

0.41

<  0.001

0.24

0.13

Rectum

2.41

1.25

0.65

1.16

0.007

1.76

<  0.001

0.6

0.001

Bladder

1.96

1.11

0.55

0.85

0.03

1.41

<  0.001

0.56

<  0.001

R fem. Head

1.09

0.81

0.75

0.28

0.002

0.34

0.005

0.06

0.34

L fem. Head

1.37

0.81

1.05

0.56

0.03

0.32

0.03

−0.24

0.42

Penile Bulb

1.61

0.89

0.74

0.72

<  0.001

0.87

0.002

0.15

0.13

C

CT-MR

MR-MR

IOV

Δ

p-value

Δ

p-value

Δ

p-value

Prostate

7.16

5.10

4.89

2.16

0.005

2.06

<  0.001

2.27

0.42

SV

6.55

5.54

5.31

1.01

0.18

1.01

0.04

1.24

0.42

CTV56

14.92

12.77

11.55

2.15

0.34

2.15

0.03

3.37

0.42

Rectum

12.36

8.89

7.65

3.47

0.38

3.47

0.06

4.71

0.47

Bladder

10.88

5.71

4.05

5.17

0.38

5.17

<  0.001

6.83

0.01

R fem. Head

4.96

4.77

4.41

0.13

0.38

0.19

0.42

0.55

0.62

L fem. Head

4.98

4.75

5.21

0.23

0.30

0.23

0.85

−0.23

0.85

Penile Bulb

6.38

3.96

3.46

2.42

<  0.001

2.42

0.002

2.92

0.38