Table 2.
Measured dose parameters for the coronary vessel scanning with and without iodinated lumen, including three repetitions and three scan modes per heart rate
| Phantom | With iodine | Without iodine | |||
|---|---|---|---|---|---|
| Heart rates | 0 bpm | 60 bpm | 80 bpm | 100 bpm | 0 bpm |
| Pitch factor | 0.8 (0.2–3.2) | 0.8 (0.2–3.2) | 0.8 (0.3–3.2) | 0.8 (0.3–3.2) | 0.8 (0.2–3.2) |
| Eff. mAs | 38 | 38 | 38 | 38 | 38 |
| CTDIvol (mGy) | 5.9 (2.7–13.7) | 6.2 (2.8–43.8) | 6.2 (2.7–33.7) | 6.1 (2.7–27.4) | 6.1 (2.8–43.8) |
| DLP (mGy*cm) | 55.8 (47.8–176.0) | 86.9 (48.0–480.0) | 86.9 (47.9–507.0) | 86.5 (47.9–415.0) | 86.6 (61.3–652.0) |
| SSDE (mGy) | 9.7 (4.4–24.3) | 10.1 (4.4–70.1) | 10.1 (4.4–53.9) | 10.1 (4.4–43.8) | 10.1 (4.5–69.9) |
Values are median (interquartile range). CTDIvol = volumetric CT dose index, DLP = dose length product, SSDE = size-specific dose estimate