To explore the feasibility of head scanning with 16 row mobile CT made in China under the condition of ambulance transportation.

Ninety-five healthy officers and soldiers (volunteers) from a training base of the army were randomly divided into 3 groups: group Ⅰ (n=77), ambulance head scanning in the stop state; group Ⅱ (n=11), ambulance head scanning in driving state; group Ⅲ (n=7), setting electromagnetic interference environment. The imaging quality, motion artifact, data acquisition and information transmission of the 3 groups in different states were analyzed and compared.

Bone window imaging: The skull, orbit and sphenoid sinus in group were clearly imaged in three groups. Window imaging of brain tissue: The structures of eyeball, optic nerve, brain stem, cortex and white matter were clearly displayed in 3 groups, but there were different degrees of motion artifacts in the skull base. Among them, 16.88% (13/77) subjects had slight linear motion artifacts in group Ⅰ, 81.82% (9/11) subjects had obvious motion artifacts in group Ⅱ, 14.29% (1/7) subjects had slight linear motion artifacts in group Ⅲ. χ² test showed that there were significant differences in between group Ⅰ, group Ⅲ and group Ⅱ (χ²=21.645, 7.901, both P<0.05); there was no significant difference between group III and group Ⅰ (χ²=0.031, P>0.05). The data acquisition and information transmission of mobile CT are normal in the state of electromagnetic interference. The dose of CTDIvol was 36.27 mGy in 3 groups.

The 16 row mobile CT scan image is stable and safe under the conditions of ambulance driving and electromagnetic interference, and the data are normal of acquisition and information transmission.