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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