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Shixiang Su,Ning Dai,Xiaosheng Cheng,Xin Zhou,Lei Wang,Herminso Villarraga-Gómez 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.4
Industrial X-ray Computed Tomography (XCT) is one of the available choices for measuring parts’ internal and externalgeometries. However, there are still several challenges that limit the current XCT technologies from being widely spread asa dimensional metrology tool. In the study presented in this paper, multi-sphere standards were developed and used for theevaluation of the accuracy of dimensional measurements performed with an open-ended 450 kV XCT system of 0.4 mmfocal spot. Normally, the multi-sphere standard refers to a combination of several ball rods of various heights, where a ‘ballrod’ is understood as a ruby sphere mounted on a rod that is usually made of carbon fi ber or ceramic. The main purpose wasto determine if the rod’s material, the spatial distribution of the ruby spheres, and/or the selection of test lengths (i.e., thecenter-to-center distance between two ruby spheres) infl uence the determination of the maximum permissible sphere distanceerror ( MPE SD ) attributable to XCT data. The experimental data suggested ceramic is more suitable as a rod material thancarbon fi ber, and also, the spatial distribution of the ruby spheres has no obvious infl uence on the accuracy evaluation ofdimensional measurements. However, the selection of test lengths will signifi cantly aff ect the accuracy evaluation results. In particular, the results of dimensional measurements showed that the evaluation of the MPE SD with multi-sphere standardsfor the XCT system used in this study can be expressed as MPE SD = ± (159 + L/800) μm.
Chuqian Lei,Ciqiu Yang,Bin Xia,Fei Ji,Yi Zhang,Hongfei Gao,Qianqian Xiong,Yufeng Lin,Xiaosheng Zhuang,Liulu Zhang,Teng Zhu,Minyi Cheng,Mei Yang,Kun Wang 한국유방암학회 2020 Journal of breast cancer Vol.23 No.1
Purpose: Tau is a microtubule-associated protein that can be found in both normal and abnormal breast cells. Whether the expression of Tau protein can predict the response to neoadjuvant chemotherapy (NACT) is still unclear. In this study, we assessed the role of Tau protein expression in predicting a pathological complete response (pCR) to NACT for different subtypes of breast cancer. Methods: Four hundred and sixty-eight eligible patients were retrospectively recruited in our study. The relationship between clinicopathologic factors, including Tau protein expression, and pCR in different subtypes was evaluated using logistic regression analysis. Correlation between Tau and disease-free survival (DFS) and overall survival (OS) was performed using Kaplan–Meier analysis. Results: The expression of Tau protein was negatively correlated with pCR, especially in triple-negative breast cancer (TNBC). No significant difference was observed in the luminal human epidermal growth factor receptor-2 (HER2)-negative subtype and HER2-positive subtype. Patients with pCR were associated with better DFS and OS (p < 0.05). However, Tau protein expression had no association with either DFS or OS (p > 0.05). Conclusion: Tau protein expression can predict pCR before NACT in TNBC, but there was no correlation between Tau expression and DFS or OS.