Abstract:Objective To assess the application value of different collimations in infant by 64-detector row CT. Methods The
experiments were divided into 3 groups by scanning length (group I 3 cm, group II 10 cm, group III 20 cm), and the QA phantom
was scanned with different collimations in each groups. The radiation dose, image quality and scanning time of different collimations
were analyzed. Results The minimum dose length product of group I (107.40 mGy·cm) was occurred in 16×0.5 mm collimation,
which of groups II and III were occurred in 16×1.0 mm collimation (243.50 and 423.90 mGy· cm). The maximum DLP of three
groups were all occurred in 4×0.5 mm collimation, followed by 64×0.5 mm collimation in group II and III. The range of CT
number of water was -3.1~+3.5 HU. The scanning speed of 16×2.0 mm collimation was the fastest in three groups, and that of
4×0.5 mm collimation was the slowest in three groups. Conclusion The 16×1.0 mm collimation is conducive to the optimization
of radiation dose and image quality of 64-detector row CT examination for infants. The 4×0.5 mm collimation is not suitable for
clinical application because of its large radiation dose and long scanning time.
李建明,周思茵,黄赛威. 64排螺旋CT不同探测通道组合在婴幼儿中的模拟应用研究[J]. 中国医疗设备, 2020, 35(3): 92-95.
LI Jianming, ZHOU Siyin, HUANG Saiwei. Simulation Application Research on Different Collimations in Infant with 64-Detector Row CT. China Medical Devices, 2020, 35(3): 92-95.