| Model | Somatom Definition - AS 64 | Somatom Definition - AS 20 / 40 CT | Somatom Emotion - 16-slice |
| Detectors, type | Ultra-fast ceramic | Ultra-fast ceramic | Ultra-fast ceramic |
| No. of rows | 40,960 ultra-fast ceramic | 40,960 ultra-fast ceramic | 736 x 16 ultra-fast ceramic |
| Gantry dimensions, H x W x D, cm | 1990 x 1170 x 2314 mm | 1990 x 1170 x 2314 mm | 1780 x 790 x 2320 mm |
| Gantry weight, kg | 5940 | 5940 | 1200 |
| Gantry aperture, cm | 78 | 78 | 70 |
| Heat storage, HU | 0 MHU (0.53 MHU capacity combined with 7.3 MHU/min 5,400 kJ/min, cooling rate comparable to performance of a conventional tube with approx. 30 MHU 22,000 kJ anode heat storage capacity) | 0 MHU (0.53 MHU capacity combined with 7.3 MHU/min 5,400 kJ/min, cooling rate comparable to performance of a conventional tube with approx. 30 MHU 22,000 kJ anode heat storage capacity) | N/S |
| Tube Cooling | Oil/water or oil/air | Oil/water or oil/air | Oil/Air |
| kW output | 80 (optional 100) | 80 | 50 |
| mA Range | 28 to 665 (optional 800) | 28 to 665 | 20 to 345 |
| Max scan volume, cm | 200 | 200 | 153 (limited by table |
| Max load capacity with accuracy, kg | 500 lb (660 lb option) | 500 lb (660 lb option) | 450 lb |
| Scan FOVs, cm | 50 (optional 78 RFOV) | 50 (optional 78 RFOV) | 50 (optional 70 RFOV) |
| Reconstruction matrices | 512 x 512 | 512 x 512 | 512 x 512 |
| Dose-modulation technique | Adaptive dose shield, IRIS, Care dose 4D, auto kV, flash spiral, 4D noise reduction, neuro best contrast, hand Care, x-Care | Adaptive dose shield, IRIS, Care dose 4D, auto kV, flash spiral, 4D noise reduction, neuro best contrast, hand Care, x-Care | Care dose 4D, hand Care |
| Suggested room size (m2) | 29 | 29 | 22 |
