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Ma Luo,Sheng Peng,Guang Yang,Letao Lin,Ligong Lu,Jiawen Chen,Fujun Zhang,Fei Gao 대한초음파의학회 2023 ULTRASONOGRAPHY Vol.42 No.1
Purpose: The aim of this study was to compare the effectiveness and outcomes of percutaneous ablation guided by ultrasonography (US) and computed tomography (CT) in colorectal liver oligometastases (CLOM). Methods: This study included patients with CLOM treated with percutaneous ablation from January 2008 to January 2021 in this observational study. Only lesions visualized on both CT and US images were further analyzed according to whether patients’ initial ablation treatments utilized US guidance or CT guidance. The Kaplan-Meier method was used to estimate local tumor progression (LTP)–free survival after propensity score matching (PSM). The LTP-free survival and treatment-related outcomes were compared between these two groups. Results: PSM identified 116 patients from each group, with 269 and 238 lesions in the USguided and CT-guided groups, respectively. US-guided ablation had a shorter average procedure time and lower cost than CT-guided ablation (27.54±12.06 minutes vs. 32.70±13.88 minutes, P=0.003; $2,175.13±618.17 vs. $2,455.49±710.25, P=0.002). For patients >60 years of age, the cumulative LTP rate at 1 year was lower in the US-guided group than in the CT-guided group (17.8% vs. 25.1%, P=0.038). For patients with perivascular liver lesions, the cumulative LTP rate at 1 year was lower in the US-guided group (14.4% vs. 28.2%, P=0.040). Conclusion: For patients whose age is >60 years or who have perivascular liver lesions, USguided ablation is better than CT-guided ablation, with a shorter treatment time and lower costs when both ablation methods are feasible for patients.
Mingrui Liu,Biao Yan,Xiongqi Peng,Fujun Peng,Lidong Wang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2
In this paper, crashworthiness of thermoplastic woven fabric reinforced composite tubes were investigated. Thermoplastic composite tubes with various length (40 mm and 80 mm) and fiber yarn orientation with respective tolengthwise (0 o/90 o, 15 o/75 o, 30 o/60 o and 45 o/45 o) were manufactured by pultrusion and welding from home-made woven glass fabric/PP prepreg sheets. Quasi-static axial compressive tests of the composite tubes were performed under various temperatures (298 K, 358 K, 398 K and 453 K). Three crushing modes were observed: progressive folding, splaying and weld seam cracking. The influence of fiber orientation, tube length-diameter ratio and testing temperature on the peak load, mean load, specific energy absorption and crush efficiency were investigated. The results show that the peak load is controlled by fiber orientation and testing temperature. The mean force, specific energy absorption and crush efficiency are related to the three mentioned factors. Both fiber orientation and testing temperature have obviously influence on crushing modes of thermoplastic composite tubes. Length-to-diameter ratio also plays a role in crushing modes when the testing temperature is higher than the melting point of the resin.