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Table 2 CT characteristics in paediatric and adult cases

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

  Paediatric cases (n = 35) Adult cases (n = 34)
Time between implantation and CT
  < 1 month 12 (32%) 28 (82%)
 1 month – 1 year 15 (41%) 3 (9%)
  > 1 year 10 (27%) 3 (9%)
ECG gating 19 (54%) 20 (59%)
Heart rate (bpm) 82±28 73±21
Tube current (mA) 135±75 219±114
Tube peak voltage (kVp)
 70 3 (9%) 0 (0%)
 80 10 (29%) 2 (6%)
 90 2 (6%) 2 (6%)
 100 15 (43%) 10 (29%)
 120 5 (14%) 19 (56%)
 140 0 (0%) 1 (3%)
Volume CT dose index (mGy) 4.9±3.8 7.7±6.0
Dose length product (mGy × cm) 128±128 292±266
Slice thickness ≤ 1 mm 28 (80%) 27 (79%)
Type of scanner
 16-slice 1 (3%) 2 (6%)
 64-slice 5 (14%) 3 (9%)
  > 64 slice 29 (83%) 29 (85%)
  1. bpm beats per minute, CT computed tomography, ECG electrocardiogram
  2. Data are frequencies and percentages or means ± standard deviations