Table 4. nCTDIair and nCTDIw evaluated for GE LightSpeed VCT 64-slice.
| kV | Small head (mGy/100 mAs) |
Head (mGy/100 mAs) |
Body (mGy/100 mAs) |
Large body (mGy/100 mAs) |
||||||||||||
| nCTDIair | nCTDIc | nCTDIp | nCTDIw | nCTDIair | nCTDIc | nCTDIp | nCTDIw | nCTDIair | nCTDIc | nCTDIp | nCTDIw | nCTDIair | nCTDIc | nCTDIp | nCTDIw | |
| 80 | 12.9 | 7.0 | 7.6 | 7.4 | 13.1 | 7.4 | 8.9 | 8.4 | 13.1 | 1.7 | 4.4 | 3.5 | 9.5 | 1.5 | 4.0 | 3.2 |
| 100 | 21.1 | 13.0 | 13.4 | 13.3 | 21.5 | 13.7 | 15.6 | 15.0 | 21.6 | 3.5 | 7.8 | 6.4 | 16.7 | 3.3 | 7.5 | 6.1 |
| 120 | 30.6 | 20.0 | 20.7 | 20.5 | 31.2 | 21.1 | 23.6 | 22.8 | 31.3 | 5.8 | 11.7 | 9.7 | 25.3 | 5.6 | 11.6 | 9.6 |
| 140 | 41.4 | 28.0 | 28.2 | 28.1 | 42.2 | 29.5 | 32.3 | 31.4 | 42.2 | 8.6 | 16.6 | 13.9 | 35.4 | 8.4 | 16.8 | 14.0 |
nCTDIair, normalised free-in-air CT dose index; nCTDIw, normalised weighted CT dose index; nCTDIc, normalised central CT dose index; nCTDIp, normalised peripheral CT dose index.