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Table 1 CT protocols per centre

From: Computed tomography image quality of aortic stents in patients with aortic coarctation: a multicentre evaluation

 

Centre 1 (n = 36)

Centre 2 (n = 26)

Centre 3 (n = 7)

Type of scanner (number of slices)

 Siemens Somatom Force (2 × 192)

6 (17%)

 Siemens Somatom Drive (2 × 128)

2 (6%)

 Siemens Somatom Definition Flash (2 × 128)

16 (44%)

 Siemens Somatom Definition AS+ (2 × 64)

8 (22%)

 Siemens Sensation 64 (64)

2 (6%)

6 (86%)

 Siemens Sensation 16 (16)

2 (6%)

 Philips Brilliance iCT (2 × 128)

25 (96%)

1 (14%)

 Philips Brilliance 16 (16)

1 (4%)

Total

36 (100%)

26 (100%)

7 (100%)

ECG gating

18 (50%)

21 (%)

Heart rate (bpm)

79±29

76±21

Tube current (mA)

198±126

176±66

80±33

Tube peak voltage (kVp)

 70

3 (8%)

 80

3 (8%)

8 (%)

1 (14%)

 90

3 (8%)

1 (%)

 100

9 (25%)

11 (%)

5 (71%)

 120

17 (47%)

6 (%)

1(14%)

 140

1 (3%)

Total

36 (100%)

26 (100%)

7 (100%)

Volume CT dose index (mGy)

5.5±5.2

8±5

3.8±3

Dose length product (mGy × cm)

190±178

255±277

132±96

Slice thickness

 0.8

8 (22%)

5 (71%)

 0.9

12 (50%)

1 (14%)

 1

26 (72%)

2 (77%)

1 (14%)

 1.5

12

 2

2 (6%)

Total

36 (100%)

26 (100%)

7 (100%)

Kernel

 B20f

7

 B26f

3

 B31f

4

 B40f

5

 B46f

1

 Bv40d

6

 I26f

16

 A

8

 

 B

6

1

 C

1

 CB

2

 XCA

4

 XCC

5

Total

36 (100%)

26 (100%)

7 (100%)

  1. bpm beats per minute, CT computed tomography, ECG electrocardiogram
  2. Data are frequencies and percentages or means ± standard deviations