Design and Application of a Parameter Model for Verification of Thoracic LDCT-PCNB Scanning
ZHAO Zijian1, LI Ruomei1, WU Ruixiang1, YE Liang1, SHEN Xueqin1, LU Lu1, WEI Xiahong2
1. Department of Imaging, Hefei Hospital Affiliated to Anhui Medical University, Hefei Anhui 230011, China;
2. Department of General, Hefei Ion Medical Center, University of Science and Technology of China, Hefei Anhui 230011, China
Abstract：Objective In many studies on scanning parameters of low-dose CT-guided percutaneous core needle biopsy (LDCT-PCNB),
the design was mostly empirical method or exhaustive method. considering the difference of hardware of different models, the
generality and ethics of these studies were to be discussed. Therefore, a phantom was designed to verify the scanning parameters
of LDCT-PCNB. Methods According to the principle of chest natural contrast and CT linear attenuation, a model was designed by
SKUP, and the 3D printer based on fused deposition modeling (FDM) was used to make the entity, which was brought into CT for
parameter contrast test. The results of different low-dose parameters were tested by t-test, and the low-dose parameters with better
values were selected to be brought into the actual scanning, and compared with the ordinary scanning by t-test. Results Through
the phantom comparison test, there were significant differences between the two LDCT parameters (P>0.01). In the actual puncture,
the ED parameters selected in the phantom experiment were about 25 times lower than those in the conventional scanning, and
the difference of the mass dose ratio between the two was large (P=0.01). Conclusion The phantom can simulate the geometric
relationship and related parameters of thoracic puncture to a certain extent, and select parameters with high quality and dose for
practical use, which can effectively reduce repeated experiments, improve the efficiency of radiation use, and avoid ethical problems.
赵子健1，李若梅1，吴瑞祥1，叶亮1，沈雪芹1，陆璐1，魏夏红2. 一种用于验证胸腔LDCT-PCNB扫描参数模型的设计与应用[J]. 中国医疗设备, 2022, 37(3): 52-55.
ZHAO Zijian1, LI Ruomei1, WU Ruixiang1, YE Liang1, SHEN Xueqin1, LU Lu1, WEI Xiahong2. Design and Application of a Parameter Model for Verification of Thoracic LDCT-PCNB Scanning. China Medical Devices, 2022, 37(3): 52-55.
