Table 2.
Operating mode | Whole-body SAR (W/kg) | Partial-body SARa (W/kg) | Head SAR (W/kg) | Local SAR (W/kg)b | ||
---|---|---|---|---|---|---|
Headc | Trunk | Extremities | ||||
Normal | 2 | 2–10 | 3.2 | 10 | 10 | 20 |
First-level controlled | 4 | 4–10 | 3.2 | 20 | 20 | 40 |
Second-level controlled | > 4 | > (4–10) | > 3.2 | > 20 | > 20 | > 40 |
Averaged SARs over 6-min RF exposure. anormal operating mode: Partial-body SAR = 10 W/kg − (8 W/kg × exposed PATIENT mass/PATIENT mass) and first (second)-level-controlled operating mode: Partial-body SAR ≧ 10 W/kg − (6 W/kg × exposed PATIENT mass/PATIENT mass). bAveraged over mass of 10 g. cIn cases where the orbit is in the field of a small LOCAL RF TRANSMIT COIL, care should be taken to ensure that the temperature rise is limited to 1°C. SAR, specific absorption rate.