宽体CT对自由呼吸状态下患者胸部扫描的临床价值OACSTPCD
Clinical value of wide body CT in chest scanning of patients under free breathing state
目的:探究16 cm宽体探测器CT扫描对无法配合屏气患者胸部检查的临床应用价值.方法:选取2022年5-8月沈阳医学院附属第二医院收治的100例胸部CT检查中无法配合屏气呼吸的患者,按照随机数表法将其分为观察组和对照组,每组50例.扫描设定观察组为16 cm宽体探测器CT扫描准直宽度256 mm×0.625 mm,对照组为8 cm宽体探测器CT扫描准直宽度128 mm×0.625 mm,其他参数相同;记录患者年龄、身高、体重、体质量指数(BMI)等指标,测量并计算CT剂量指数(CTDIvol)、剂量长度乘积(DLP)及有效辐射剂量(ED),对比噪声比(CNR)、信噪比(SNR)及标准差(SD),并对图像质量进行主客观评价.结果:观察组患者平均年龄为(78.81±6.84)岁,平均体重为(64.46±9.86)kg,BMI、CTDIvol、DLP、ED及曝光时间的平均值分别为(22.89±3.09)kg/m2、(4.61±1.00)mGy、(1 471.02±345.25)mGy·cm、(20.59±4.83)mSv和(1.01±0.61)s.对照组患者的平均年龄为(77.70±6.76)岁,平均体重为(62.84±4.75)kg,BMI、CTDIvol、DLP、ED及曝光时间的平均值分别为(22.89±2.29)kg/m2、(14.5±0.00)mGy、(4 561.70±346.32)mGy·cm、(63.86±4.85)mSv和(4.07±0.12)s.观察组主肺动脉、右下肺静脉干及主动脉弓主观评价与对照组比较,差异无统计学意义(P＞0.05).两组图像质量主观评分均＞4分,图像质量均能满足诊断要求.观察组患者的CTDIvol、DLP、ED及曝光时间均低于对照组,差异有统计学意义(t=-69.42、-44.231、-44.234、-107.10,P＜0.05).结论:相比传统8 cm探测器CT扫描,16 cm宽体探测器在自由呼吸的患者胸部CT扫描中可以大幅度缩短扫描时间,降低辐射剂量,且图像质量均满足诊断需求,对临床上急诊的快速诊断具有很高的应用价值.
Objective:To explore the application value of compute tomography(CT)scan with 16cm wide body detector in chest examination of patients who could not cooperate with breath-holding.Methods:A total of 100 patients who could not cooperate with breath-holding during chest examination in the second affiliated hospital of Shenyang Medical College from May to August in 2022 were selected,and they were randomly divided into observation group and control group,with 50 patients in each group.The collimation width of CT scan with 16cm wide body detector was 256 mm×0.625 mm in the observation group,and that with 8 cm wide body detector was 128 mm×0.625 mm in the control group,and other parameters of two groups were same.A series of indicators included age,height,weight and body mass index(BMI)of patients were recorded,and the CT dose index(CTDIvol),dose length product(DLP),effective dose(ED)were measured and calculated.And then,the Contrast to Noise ratio(CNR),signal to noise(SNR)and Standard Deviation(SD)between two groups were compared,and the image quality was evaluated objectively and subjectively.Results:The average age and the average weight of the patients in the observation group were respectively(78.81±6.84)years old and(64.46±9.86)kg,and the mean values of BMI,CTDIvol,DLP,ED and exposure time were respectively(22.89±3.09)kg/m2,(4.61±1.00)mGy,(1 471.02±345.25)mGy·cm,(20.59±4.83)mSv,(1.01±0.61)s.The average age and the average weight of the patients in the control group were respectively(77.70±6.76)years old and(62.84±4.75)kg.The mean values of BMI,CTDIvol,DLP,Ed and exposure time were respectively(22.89±2.29)kg/m2,(14.5±0.00)mGy,(4 561.70±346.32)mGy·cm,(63.86±4.85)mSv and(4.07±0.12)s.The differences of subjective evaluations of main pulmonary artery,right inferior pulmonary vein trunk and aortic arch between the observation group and the control group were not significant(P>0.05).The subjective scores of image qualities both two groups were larger than 4,and the image qualities of two groups could meet the diagnostic requirements.The CTDIvol,DLP,ED and exposure time of observation group were significantly lower than those in control group(t=-69.42,-44.231,-44.234,-107.10,P<0.05),respectively.Conclusion:Compared with the CT scan with conventional 8 cm detector,the CT scan with 16 cm wide body detector can greatly shorten the scanning time and reduce the radiation dose in the chest CT scan of patients with free breathing,and the image quality of that can meet the requirement of clinical diagnosis,which has very high application value in the fast diagnosis of clinical emergency.
邹雪超;王冠;朴成浩;赵岩;孟欢
沈阳医学院附属第二医院放射科 沈阳 110004东软医疗系统股份有限公司 CT产品事业部 沈阳 110004
特种医学
屏气呼吸胸部扫描16cm宽体探测器图像质量
Breath-holdingChest scan16 cm wide body detectorImage quality
《中国医学装备》 2024 (003)
44-47,62 / 5
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