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Table 2 PTAS CTA radiation exposure by tube potential and scan indication

From: Feasibility of aortic valve assessment with low dose prospectively triggered adaptive systolic (PTAS) cardiac computed tomography angiography

  Tube current (mAs) DLP (mGy*cm) CTDIvol(mGy) Scan length (cm) Effective Radiation (mSv)
All exams 218.0 ± 40.2 201.0 [98.3–311.3] 12.9 [6.2–20.7] 17.2 [13.8–20.6] 2.8 [1.4–4.4]
Radiation exposure by tube voltage
80 kV (n = 8) 211.4 ± 42.0 88.0 [85.0–105.5] 6.1 [4.9–6.3] 17.2 [13.8–17.2] 1.2 [1.2–1.5]
100 kV (n = 10) 202.8 ± 36.8 189.0 [140–231] 12.1 [6.8–13.2] 15.6 [13.8–20.6] 2.6 [2.0–3.2]
120 kV (n = 7) 222.1 ± 35.3 298.0 [256.5–385.5] 20.7 [18.2–21.6] 13.8 [13.8–17.3] 4.2 [3.6–5.4]
140 kV (n = 4) 262.0 ± 29.7 768.0 [642.5–872.0] 39.0 [36.3–40.6] 20.7 [17.2–22.4] 10.8 [9.0–12.2]
Radiation exposure by scan indication
Native coronary (n = 19) 225.7 ± 40.1 157.0 [86.0–296.3] 9.9 [6.0–21.1] 13.8 [13.8–17.2] 2.2 [1.2–4.1]
Bypass graft (n = 3) 232.0 ± 17.1 713.0 [319.3–869.0] 34.5 [22.2–37.2] 20.7 [12.9–23.3] 10.0 [4.5–12.2]
Aorta (n = 5) 183.2 ± 35.1 231.0 [202.3–292.5] 13.2 [9.8–15.1] 20.6 [17.3–20.7] 3.2 [2.8–4.1]
Pre-TAVI (n = 2) 211.0 ± 53.7 180 [90–270] 8.7 [4.3–13.0] 20.7 [ 20.7–20.7] 2.5 [1.3–3.8]