| Zhang Wei,Zhao Guosheng,Li Chao,et al.Analysis of positive rates and justification of multi-site computed tomography examinations in clinical emergency settings[J].Chinese Journal of Radiological Medicine and Protection,2026,46(1):84-89 |
| Analysis of positive rates and justification of multi-site computed tomography examinations in clinical emergency settings |
| Received:March 26, 2025 |
| DOI：10.3760/cma.j.cn112271-20250326-00112 |
| KeyWords:Computed tomography Positive rate Radiation injury Justification |
| FundProject: |
| Author Name | Affiliation | E-mail | | Zhang Wei | Department of Radiology, Yiwu Central Hospital, Yiwu 322000, China | | | Zhao Guosheng | Department of Radiology, Yiwu Central Hospital, Yiwu 322000, China | | | Li Chao | Department of Radiology, Yiwu Central Hospital, Yiwu 322000, China | | | Fu Ning | Department of Radiology, Yiwu Central Hospital, Yiwu 322000, China | | | He Yuanjiao | Department of Radiology, Yiwu Central Hospital, Yiwu 322000, China | zeng.zhaochong@zs-hospital.sh.cn |
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| Abstract:: |
| Objective To explore the justification of emergency multi-site computed tomography (CT) examinations and to evaluate whether they conformed to the principle of justification in radiological practice. Methods A retrospective analysis was performed on data of 1 989 cases of emergency multi-site CT examinations in Yiwu Central Hospital from July to December 2024. The positive rates by person-time and by site were calculated, and differences in positive rates among patients of different age groups, patients with different numbers of examined sites, examinations requested by different departments, and reasons for presentation were compared. Results The overall positive rate by site was 33.10% (2 423/7 321), which was significantly lower than the national standard of ≥60%. The positive rates of children (19.05%) and adolescents (15.38%) were significantly lower than that of adults (33.75%) (χ2 = 24.56, P<0.05). The positive rate of multi-site (≥6) CT examinations was as high as 58.48%, significantly higher than those of other groups. The positive rate of CT examinations requested by the emergency intensive care unit (75.31%) and that for neurological disorders (57.36%) were highest among departments and reasons for presentation, respectively (χ2 = 313.07, P<0.05). The proportion of positive cases was 58.17% (1 157/1 989). The positive rate by site was significantly lower than the positive rate by person-time (χ2 = 415.70, P<0.001). Conclusions The positive rates of emergency multi-site CT examinations are generally lower than the national standard, with an imbalance between radiation dose and diagnostic benefits and a risk of over-examination. It is necessary to strengthen justification evaluation to reduce unnecessary radiation exposure. |
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