Table 4 CT examination parameters for GE scanner protocols
No. | Scan Mode | Noise Index | Auto- prescription | Pitch | Tube voltage [kVp] | Tube current [mAs] | CTDIvol [mGy] | DLP [mGy.cm] | ED [mSv] | SNR | FOM | IQ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Newborn Head Protocols | ||||||||||||
GBH | Axial | 18 | On | 1.00 | 100 | 162.53 | 13.96 | 167.58 | 1.40 | 3.83 | 10.48 | 2 |
Newborn Arterial Phase CAP Protocols | ||||||||||||
GB1 | Axial | 18 | Off | 1.00 | 80 | 150 | 0.99 | 20.28 | 1.200 | 4.23 | 14.91 | 3 |
GB2 | Axial | 28 | Off | 1.00 | 80 | 240 | 1.59 | 33.46 | 1.900 | 3.22 | 5.46 | 4 |
GB3 | Helical | 18 | Off | 0.52 | 80 | 207 | 2.35 | 59.72 | 3.400 | 4.1 | 4.94 | 4 |
GB4 | Helical | 20 | On | 0.52 | 80 | 122 | 2.32 | 40.79 | 2.900 | 5.2 | 9.32 | 4 |
GB5 | Axial | 20 | Off | 1.00 | 80 | 200 | 1.33 | 27.85 | 1.600 | 3.43 | 7.35 | 3 |
Newborn Arterial Phase CAP + Venous Phase AP Protocols | ||||||||||||
GBI | Axial | 18 | Off | 1.00 | 80 | 150.02 | 1.98 | 34.80 | 2.7 | 9.26 | 9.26 | 4 |
GBII | Helical | 20 | Off | 0.98 | 100 | 247.52 | 3.45 | 92.16 | 5.8 | 1.18 | 1.18 | 3 |
GBIII | Helical | 20 | Off | 0.98 | 80 | 250.02 | 1.86 | 49.62 | 3.2 | 2.97 | 2.97 | 3.5 |
Child Head Protocols | ||||||||||||
GCH | Axial | 26 | On | 1.00 | 120 | 177.53 | 26.91 | 376.75 | 1.10 | 8.08 | 59.35 | 4 |
Child Arterial Phase CAP Protocols | ||||||||||||
GC1 | Helical | 26 | On | 0.52 | 100 | 98.79 | 2.10 | 96.38 | 3.30 | 7.13 | 15.41 | 4 |
GC2 | Helical | 20 | Off | 0.52 | 100 | 140.76 | 4.24 | 120.45 | 2.80 | 6.11 | 13.33 | 4 |
GC3 | Axial | 20 | Off | 1.00 | 100 | 300.21 | 4.69 | 197.14 | 4.40 | 7.21 | 11.81 | 4 |
Child Arterial Phase CAP + Venous Phase AP Protocols | ||||||||||||
GCI | Helical | 26 | On | 0.52 | 100 | 103.27 | 4.28 | 161.69 | 4.7 | 7.45 | 11.81 | 4 |
GCII | Helical | 20 | Off | 0.98 | 100 | 143.01 | 2.36 | 104.99 | 3.2 | 5.52 | 9.52 | 3.5 |