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European Radiology Experimental

Table 2 Descriptive statistics for the eight structure parameters and CNR

From: Photon-counting detector CT and energy-integrating detector CT for trabecular bone microstructure analysis of cubic specimens from human radius

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Average measures

Dispersion measures

BVTV

Tb.Th

Tb.Sc

Tb.Sp

Tb.Nd

CNR

s(Tb.Th)

s(Tb.Sc)

s(Tb.Sp)

PCD-CT2 51

0.32

0.45

1.16

0.79

1.36

8.07

0.15

0.46

0.37

(0.27; 0.36)

(0.43; 0.46)

(1.08; 1.30)

(0.68; 0.88)

(1.06; 1.71)

(6.89; 9.56)

(0.14; 0.16)

(0.39; 0.54)

(0.31; 0.45)

PCD-CT2 30

0.32

0.44

1.16

0.79

1.39

7.73

0.15

0.46

0.37

(0.27; 0.36)

(0.43; 0.45)

(1.07; 1.30)

(0.68; 0.88)

(1.10; 1.77)

(6.55; 9.31)

(0.14; 0.16)

(0.40; 0.54)

(0.30; 0.46)

PCD-CT2 18

0.33

0.45

1.15

0.78

1.39

7.94

0.15

0.46

0.36

(0.28; 0.37)

(0.43; 0.46)

(1.06; 1.29)

(0.67; 0.87)

(1.08; 1.76)

(6.44; 9.16)

(0.15; 0.16)

(0.38; 0.53)

(0.30; 0.46)

EID-CT1 1000

0.34

0.50

1.20

0.85

0.86

6.45

0.13

0.44

0.35

(0.28; 0.37)

(0.48; 0.50)

(1.12; 1.34)

(0.75; 0.94)

(0.64; 1.07)

(5.34; 7.05)

(0.12; 0.14)

(0.38; 0.52)

(0.31; 0.44)

EID-CT1 600

0.35

0.53

1.23

0.85

0.78

5.93

0.15

0.45

0.35

(0.30; 0.39)

(0.52; 0.54)

(0.16; 0.36)

(0.76; 0.94)

(0.60; 0.97)

(4.95; 6.39)

(0.14; 0.16)

(0.40; 0.51)

(0.32; 0.46)

Micro-CT

0.09

0.14

1.07

0.91

9.32

24.94

0.06

0.30

0.27

(0.07; 0.12)

(0.13; 0.16)

(0.86; 1.17)

(0.73; 1.04)

(6.78; 11.04)

(21.44; 26.50)

(0.05; 0.06)

(0.24; 0.36)

(0.22; 0.32)

  1. Data are presented as median (1st quartile, 3rd quartile)
  2. BVTV Bone volume fraction, CNR Contrast-to-noise ratio, EID-CT Multislice computed tomography using energy-integrating detectors, Micro-CT Micro-computed tomography, PCD-CT Multislice computed tomography using photon-counting detectors, Tb.Nd Trabecular nodes, Tb.Th Trabecular thickness, Tb.Sc Trabecular spacing, Tb.Sp Trabecular separation. s(Tb.Th), s(Tb.Sc) and s(Tb.Sp) are the intra-volume standard deviation for Tb.Th, Tb.Sc and Tb.Sp, respectively. The numbers after the type of scanner correspond to the field of view in mm (PCD-CT) and quality reference tube load in mAs (EID-CT)
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