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目的探讨应用靶扫描模式行婴幼儿胸部成像的临床应用价值。方法 80例婴幼儿患者使用东芝Aquilion ONE 320排计算机断层扫描(computed tomography,CT)行胸部平扫,按就诊次序随机分为两组,分别应用容积扫描和靶扫描。记录每次CT剂量容积指数(computed tomography dose index-volume,CTDIvol)、剂量长度乘积(dose length product,DLP),评价图像质量并测量图像噪声。结果 CTDIvol、DLP、有效辐射剂量(effective dose,ED)和图像噪声在靶扫描模式和容积扫描模式间无统计学差异(P>0.05)。两种扫描模式图像质量主观评价在肺尖部无统计学差异(P>0.05),在主动脉弓部、左房中部和肺底部比较差异具有统计学意义(P<0.001)。结论在婴幼儿胸部平扫中,靶扫描模式较普通容积扫描模式具有明显优势,在提供更优质图像的同时不带来额外的辐射剂量。
Objective To explore the clinical value of target scanning in imaging chest imaging in infants and young children. Methods Totally 80 cases of infants and young children underwent chest CT scan with computed tomography (CT) of Toshiba Aquilion ONE 320. The patients were divided into two groups according to the order of treatment. Volume scanning and target scanning were performed respectively. The computed tomography dose index-volume (CTDIvol), dose length product (DLP) was recorded, the image quality was evaluated and the image noise was measured. Results CTDIvol, DLP, effective dose (ED) and image noise had no significant difference between target scan mode and volume scan mode (P> 0.05). There was no significant difference in the subjective evaluation of image quality between the two scan modes at the apex of the lung (P> 0.05), but at the aortic arch, middle of the left atrium and at the bottom of the lung (P <0.001). Conclusions In infant chest scan, the target scan mode has the obvious advantage over the normal volume scan mode, providing better images with no additional radiation dose.