Analysis and aeromedical assessment on the craniocerebral MRI examination results of military flying personnel
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目的 分析军事飞行人员颅脑MRI筛查结果，从影像学角度提升对军事飞行人员颅脑疾病和航空医学鉴定的认识。 方法 回顾性分析2020年9月至2021年12月于空军杭州特勤疗养中心行年度体检的军事飞行人员颅脑MRI筛查结果。按年龄分为20~29、30~39、40~49和50~59岁4个组；按照飞行机种及职别，分为歼击机飞行员、轰运机飞行员、直升机飞行员和空中战技勤人员4个组。比较不同年龄、飞行机种及职别组飞行人员颅脑MRI筛查结果检出情况，分析检出异常结果对航空医学鉴定结论的影响。统计分析α水平设为0.05，组间两两比较以P<α/统计次数为差异有统计学意义。 结果 975名军事飞行人员颅脑MRI筛查中未见明显异常473例，Willis环变异194例，脑先天畸形27例，脑血管疾病54例，脑白质高信号（white matter hyperintensities，WMHs）279例，肿瘤及肿瘤样病变22例，蛛网膜囊肿26例，空泡蝶鞍29例，颅内钙化7例，颅脑外伤2例。20~29岁及30~39岁组未见明显异常比例高于其他年龄组；40~49、50~59岁组WMHs检出率高于其他年龄组；50~59岁脑血管疾病及空泡蝶鞍检出率均高于其他年龄组，差异均有统计学意义（P均<α/6=0.008）。歼击机飞行员与直升机飞行员未见明显异常比例高于其他飞行人员；空中战技勤人员WMHs检出率高于其他飞行人员；轰运机飞行员蛛网膜囊肿检出率高于歼击机飞行员，差异均有统计学意义（P均<α/6=0.008）。颅脑MRI筛查检出的异常结果多数对航空医学鉴定结论无明显影响；影响较大的为脑血管疾病、肿瘤及肿瘤样病变（P均<α/351<0.001）。 结论 本次筛查从影像学角度初步阐释了不同年龄、飞行机种和职别军事飞行人员颅脑疾病分布的基本特征，为动态随访和精准航空医学鉴定提供了依据。 Objective To improve the understanding of craniocerebral diseases and aeromedical assessment from the perspective of imaging by analyzing the results of craniocerebral MRI examination of military flying personnel. Methods The results of craniocerebral MRI examination were retrospectively analyzed among the military flying personnel who underwent annual physical examination in Air Force Healthcare Center for Special Services Hangzhou from September of 2020 to December of 2021. They were divided into 20-29 years group, 30-39 years group, 40-49 years group, 50-59 years group according to the age, and they were divided into fighter pilots, bomb-transporter pilots, helicopter pilots, air combat/technical personnel according to the aircraft type and post. The detection of craniocerebral MRI examination results of the flying personnel in different age groups and aircraft type and post groups were compared. The influence of abnormal results on the conclusion of aeromedical assessment was analyzed. The α level of statistical analysis was set at 0.05, and the difference was statistically significant with P<α/statistical count for pairwise comparison among groups. Results Among the craniocerebral MRI examination results of 975 military flying personnel, 473 cases were with no obvious abnormality, 194 were anatomical variation of Willis circle, 27 were congenital brain malformation, 54 were cerebrovascular disease, 279 were white matter hyperintensities (WMHs), 22 were tumor and tumor-like lesions, 26 were arachnoid cyst, 29 were empty sella, 7 were intracranial calcinosis and 2 were craniocerebral trauma. The proportion of no obvious abnormality in 20-29 years group and 30-39 years group were higher than those in other age groups the detection rates of WMHs in 40-49 years group and 50-59 years group was higher than those in the other age groups the detection rates of cerebrovascular diseases and empty sella in 50-59 years group were higher than those in the other age groups, and the differences were significant (all P<α/6=0.008). The proportion of no obvious abnormality in fighter pilots and helicopter pilots were higher than those in others the detection rate of WMHs in air combat/technical personnel was higher than that in others the detection rate of arachnoid cyst in bomb-transporter pilots was higher than that in fighter pilots, and the differences were significant (all P<α/6=0.008). Most of the abnormal results detected by craniocerebral MRI examination had no significant impact on the conclusion of aeromedical assessment, and those with greater impact were cerebrovascular disease, tumor and tumor-like lesions (both P<α/351=0.001). Conclusions The MRI examination not only preliminarily explains the basic characteristics of the distribution of craniocerebral diseases among military flying personnel of different ages, aircraft types and posts from the perspective of imaging, but also provides the basis for dynamic follow-up and accurate aeromedical assessment.
Objective To improve the understanding of craniocerebral diseases and aeromedical assessment from the perspective of imaging by analyzing the results of craniocerebral MRI examination of military flying personnel. Methods The results of craniocerebral MRI examination were retrospectively analyzed among the military flying personnel who underwent annual physical examination in Air Force Healthcare Center for Special Services Hangzhou from September of 2020 to December of 2021. They were divided into 20-29 years group, 30-39 years group, 40-49 years group, 50-59 years group according to the age, and they were divided into fighter pilots, bomb-transporter pilots, helicopter pilots, air combat/technical personnel according to the aircraft type and post. The detection of craniocerebral MRI examination results of the flying personnel in different age groups and aircraft type and post groups were compared. The influence of abnormal results on the conclusion of aeromedical assessment was analyzed. The α level of statistical analysis was set at 0.05, and the difference was statistically significant with P<α/statistical count for pairwise comparison among groups. Results Among the craniocerebral MRI examination results of 975 military flying personnel, 473 cases were with no obvious abnormality, 194 were anatomical variation of Willis circle, 27 were congenital brain malformation, 54 were cerebrovascular disease, 279 were white matter hyperintensities (WMHs), 22 were tumor and tumor-like lesions, 26 were arachnoid cyst, 29 were empty sella, 7 were intracranial calcinosis and 2 were craniocerebral trauma. The proportion of no obvious abnormality in 20-29 years group and 30-39 years group were higher than those in other age groups the detection rates of WMHs in 40-49 years group and 50-59 years group was higher than those in the other age groups the detection rates of cerebrovascular diseases and empty sella in 50-59 years group were higher than those in the other age groups, and the differences were significant (all P<α/6=0.008). The proportion of no obvious abnormality in fighter pilots and helicopter pilots were higher than those in others the detection rate of WMHs in air combat/technical personnel was higher than that in others the detection rate of arachnoid cyst in bomb-transporter pilots was higher than that in fighter pilots, and the differences were significant (all P<α/6=0.008). Most of the abnormal results detected by craniocerebral MRI examination had no significant impact on the conclusion of aeromedical assessment, and those with greater impact were cerebrovascular disease, tumor and tumor-like lesions (both P<α/351=0.001). Conclusions The MRI examination not only preliminarily explains the basic characteristics of the distribution of craniocerebral diseases among military flying personnel of different ages, aircraft types and posts from the perspective of imaging, but also provides the basis for dynamic follow-up and accurate aeromedical assessment.
Magnetic resonance imagingPhysical examinationEligibility determinationCraniocerebral diseasesMilitary flying personnel
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