To compare and analyze results of head scan, incidence of adverse events, time consuming, accumulated working hours and radiation risk of bedside mobile CT and conventional large-scale CT.

Twenty-seven patients who underwent head scanning with domestic 16 row mobile CT in ICU of Langfang Edberg Hospital from December 2017 to November 2019 were selected as mobile CT group, and 30 severe craniocerebral patients who were transferred from ICU to Radiology Department for 64 row large CT head scanning in the same period were selected as large CT group. The results of quality of head tomography and the incidence of adverse events were collected, and the scanning time consuming, personnel cost and radiation dose of CT examination were recorded respectively.

Imaging quality and adverse events: The imaging were clear both mobie and convetional CT. Both CT showed clear and accurate diagnosis of cerebral hemorrhage, cerebral infarction and brain damage, et al. There was no adverse events in the mobile CT bedside scanning, while the incidence of adverse events in conventional large CT scanning was 23.33%. The average examination time of the mobile CT group was (15.68±2.69) min, while the conventional large CT group was (27.47±4.38) min. The statistical analysis showed a significant difference in examination times and personnel costs between the two groups (P<0.001). The radiation dose indicators of mobile CT group recorded of CT dose index volume (34.55±4.08) mGy, dose length product (370.93±69.15) mGy.cm, and effective dose (0.80±0.06) mSv; While in the conventional large CT group, the radiation dose indicators were (56.49±7.42) mGy, (902.59±128.18) mGy.cm, and (1.90±0.27) mSv respectively. There were significant differences in the radiation dose indicators between the two groups (P<0.05).

The quality of head scan imaging in both the mobile and the conventional large CT groups met the clinical diagnostic criteria. However, no adverse events occurred in the mobile CT group, and acuumulated working hours, examination time and radiation dose were significantly lower than those in the conventional large CT group.