Table 5:
Aquilion Visiona
| Scanogram (AP–Lat) | Basal Scan (Optional) | Contrast Scan | |
|---|---|---|---|
| Coverage | Sternum to midhead | Midneck to cover the bifurcation | From aortic arch to midhead |
| Scan mode | Scanogram | Helical | Helical |
| Start time | NA | Bolus trackingb | |
| Range | 500 mm | 8 cm | Variable |
| Collimation | NA | 0.5 × 80 | 0.5 × 80 |
| Pitch | NA | 1 | 1 |
| kV | 120 | 120 | 120 |
| mA | 50–200c | 350 | 350 |
| Rotation time | NA | 0.275 second | 0.275 second |
| Direction | NA | Caudocraniald | Caudocraniald |
| Slice thickness | NA | 1 mm | 1 mm |
| Slice interval | NA | 0.5 mm | 0.5 mm |
| FOV | Wide | 20 cm | 20 cm |
| Filter | NA | Sharp (FL03) | Sharp (FL03) |
| CTDI (mGy) | – | 15 | 15 |
| DLP (mGy × cm) | – | 0.6 | 0.6 |
| Amount of CM | – | – | 40–50 mLe |
| IDR | – | – | 1.4–1.5 g I/s |
| Concentrationf | – | – | 370 mg I/mL |
| Flow ratef | – | – | 4 mL/s |
Note:—NA indicates not applicable; AP, anteroposterior; Lat, lateral; CTDI, CT dose index; DLP, dose-length product; IDR, iodine delivery rate; CM, contrast medium.
a
Toshiba Medical Systems, Tokyo, Japan.
b
Position of bolus tracking: aortic arch, threshold 100 HU.
c
50 mA in AP and 200 in Lat.
d
Craniocaudal is also possible.
e
Variable according to the concentration.
f
Concentration × flow rate = IDR. The parameter to be considered is IDR.