TABLE 2.
Patient and Dose Information for the 25 Abdominopelvic and 25 Chest CT Examinations Evaluated
| CT Examination, Contrast Agent Status, Kilovoltage | No. of Patients | Age (y)
|
CTDIvol (mGy), Mean ± SD | SSDE (mGy), Mean ± SD | |
|---|---|---|---|---|---|
| Mean ± SD | Range | ||||
|
| |||||
| Abdominopelvic | |||||
| With contrast agent | |||||
| 80 kV | 0 | NA | NA | NA | NA |
| 100 kV | 11 | 8.4 ± 5.8 | 1–17 | 5.2 ± 2.5 | 9.1 ± 3.3 |
| 120 kV | 13 | 9.6 ± 4.1 | 4–16 | 7.4 ± 5.6 | 11.1 ± 4.5 |
| Without contrast agent, 120 kV | 1 | 8.0 ± 0.0 | 8–8 | 4.0 ± 0.0 | 7.4 ± 0.0 |
|
| |||||
| Total | 25 | 8.7 ± 4.8 | 1–17 | 6.4 ± 4.3 | 10.3 ± 3.8 |
|
| |||||
| Chest | |||||
| With contrast agent | |||||
| 80 kV | 1 | 0.0 ± 0.0 | 0–0 | 1.1 ± 0.0 | 2.6 ± 0.0 |
| 100 kV | 8 | 2.0 ± 0.7 | 1–3 | 2.1 ± 0.6 | 4.5 ± 1.3 |
| 120 kV | 4 | 7.2 ± 2.3 | 6–11 | 2.8 ± 0.7 | 5.1 ± 1.3 |
| Without contrast agent, 120 kV | 11 | 6.8 ± 5.7 | 1–17 | 2.6 ± 1.5 | 4.5 ± 1.8 |
|
| |||||
| Total | 25 | 5.1 ± 4.7 | 0–17 | 2.4 ± 1.1 | 4.5 ± 1.5 |
Note—The volume CT dose index (CTDIvol) was based on a 32-cm CT dose index (CTDI) phantom. SSDE = size-specific dose estimate, NA = not applicable.