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