Table 3. Injection parameters (mean [ranges]) for both scan protocols for different kV settings.
High pitch (n = 81) | ||||
---|---|---|---|---|
Injection parameter | Sex | 70 kV | 80 kV | 90 kV |
Flow rate (mL/s) | F | 3.0 [2.4–4.0] | 4.1 [3.2–5.2] | 4.9 [4.3–5.4] |
M | 3.7 [2.6–4.4] | 4.8 [4.1–5.5] | 5.8 [5.2–6.7] | |
Test bolus (mL) | F | 6.2 [4.9–8.0] | 8.7 [6.9–11.1] | 10.5 [9.0–12.0] |
M | 7.8 [4.9–8.9] | 10.2 [9.0–12.0] | 12.6 [10.8–14.1] | |
Main bolus (mL) | F | 25.1 [19.8–32.9] | 34.8 [26.9–45.0] | 41.5 [37.1–45.9] |
M | 31.4 [21.8–37.8] | 41.0 [34.9–48.0] | 50.7 [46.0–57.1] | |
TIL (g) | F | 7.5 [5.9–9.9] | 10.4 [8.1–13.5] | 12.5 [11.1–13.8] |
M | 9.4 [6.5–11.3] | 12.3 [10.5–14.4] | 15.2 [13.8–17.1] | |
IDR (g I/s) | F | 0.9 [0.7–1.2] | 1.2 [1.0–1.6] | 1.5 [1.3–1.6] |
M | 1.1 [0.8–1.3] | 1.4 [1.2–1.7] | 1.7 [1.6–2.0] | |
IT | F | 8 [8–9] | 9 [8–9] | 9 [9–9] |
M | 8 [8–9] | 9 [8–9] | 9 [9–9] | |
AS (n = 33) | ||||
Injection parameter | ||||
Flow rate (mL/s) | F | 3.2 [2.7–3.8] | 3.9 [3.5–4.2] | 5.2 [4.5–5.8] |
M | 3.9 [3.3–4.5] | 4.7 [4.0–5.4] | 5.8 [5.5–6.0] | |
Test bolus (mL) | F | 6.5 [5.0–8.0] | 7.8 [6.8–8.8] | 10.4 [9.0–11.8] |
M | 8.5 [6.9–10.1] | 9.9 [8.0–12.0] | 12.4 [11.9–12.9] | |
Main bolus (mL) | F | 32.8 [27.8–40.1] | 39.8 [35.8–43.8] | 54.3 [46.9–61.7] |
M | 41.3 [33.9–48.1] | 49.9 [41.7–58.0] | 61.0 [59.1–62.9] | |
TIL (g) | F | 9.9 [8.3–12.0] | 11.9 [10.7–13.1] | 16.3 [14.1–18.5] |
M | 12.4 [10.2–14.4] | 15.0 [12.5–17.4] | 18.3 [17.7–18.9] | |
IDR (g I/s) | F | 1.0 [0.8–1.1] | 1.2 [1.1–1.3] | 1.6 [1.4–1.7] |
M | 1.2 [1.0–1.4] | 1.4 [1.2–1.6] | 1.7 [1.7–1.8] | |
IT | F | 10 [10–11] | 10 [10–10] | 11 [10–11] |
M | 11 [10–11] | 11 [10–10] | 11 [11–11] |
Note–Values are presented as means [range]
High pitch = prospective ‘high pitch’ scan protocol; AS = prospective ‘adaptive sequence’ scan protocol; TIL = total iodine load; IDR = iodine delivery rate; IT = injection time