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Your search keyword '"Zhao, Zhen-Long"' showing total 163 results
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163 results on '"Zhao, Zhen-Long"'

25. Improvement of femtosecond SPPs imaging by two-color laser photoemission electron microscopy.

Author

Fu, Chun-Lai, Zhao, Zhen-Long, Ji, Bo-Yu, Song, Xiao-Wei, Lang, Peng, and Lin, Jing-Quan

Subjects
*PHOTOEMISSION, *ELECTRON microscopy, *LASERS, *PHOTOELECTRONS, *POLARITONS, *FEMTOSECOND lasers
Abstract

Clear imaging of surface plasmon polaritons (SPPs) is a prerequisite for SPPs-based applications. In this work, we demonstrate an improvement of near-field imaging of SPPs via directly comparing the visibility of the photoemission electron microscopy (PEEM) image of SPPs under one- and two-color laser excitation (also known as one- or two-color laser PEEM). By measuring the photoelectron yield and the contrast of the interference fringes of SPPs, we demonstrate that in addition to enhancing the photoemission yield, two-color laser PEEM can significantly improve the contrast between bright and dark fringes (nearly 4 times higher than that of one-color laser case). By recording the nonlinear order of the photoelectrons ejected from the bright and dark fringes, respectively, the underlying mechanism for the improved visibility is revealed. In addition, the influences of the polarization direction of 400-nm laser on the PEEM images of the SPPs with different wave vector directions are shown. These results can provide technical support for the development of SPPs-based communication devices and catalysis. [ABSTRACT FROM AUTHOR]

Published
2022
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26. Efficacy and Safety of Thermal Ablation for Treatment of Solitary T1N0M0 Papillary Thyroid Carcinoma: A Multicenter Retrospective Study

Author

Cao, Xiao-Jing, primary, Wang, Shu-Rong, additional, Che, Ying, additional, Liu, Juan, additional, Cong, Zhi-Bin, additional, He, Jun-Feng, additional, Wang, Hong-Ling, additional, Liu, Geng, additional, Guo, Jian-Qin, additional, Hao, Ying, additional, Wang, Zhong-Hua, additional, Zhou, Ying, additional, Jian, Mei, additional, Shi, Li-Li, additional, Qi, Lu, additional, Zhu, Ya-Lin, additional, Wang, Xue, additional, Yan, Guo-Zhen, additional, Shataer, Aini, additional, Liu, Xiao-Fang, additional, Wei, Ying, additional, Zhao, Zhen-Long, additional, Peng, Li-Li, additional, Li, Yan, additional, and Yu, Ming-An, additional

Published
2021
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28. A study on the causes of operative failures after microwave ablation for primary hyperparathyroidism

Author

Li Yan, Peng Li-Li, Yu Ming-An, Cao Xiao-Jing, Zhao Zhen-Long, and Wei Ying

Subjects
Target lesion, Male, medicine.medical_specialty, medicine.medical_treatment, Primary hyperparathyroidism, Parathyroid hormone, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Recurrence, medicine, Humans, Radiology, Nuclear Medicine and imaging, Microwaves, Retrospective Studies, Parathyroidectomy, Radiofrequency Ablation, medicine.diagnostic_test, Interventional, business.industry, Microwave ablation, Nodule (medicine), Interventional radiology, Retrospective cohort study, General Medicine, Ablation, medicine.disease, Hyperparathyroidism, Primary, Microwave radiation, Parathyroid Hormone, 030220 oncology & carcinogenesis, Female, Radiology, medicine.symptom, business
Abstract

Objective To summarize the occurrence of operative failures after microwave ablation (MWA) in patients with primary hyperparathyroidism (pHPT), analyze the possible reasons, and explore strategies for preventing and managing these situations. Methods This retrospective study reviewed 91 pHPT patients who underwent MWA from April 2015 to November 2019. A cure was defined as the reestablishment of normal calcium homeostasis lasting a minimum of 6 months. An operative failure was defined as a failure to normalize serum intact parathyroid hormone (iPTH) and/or calcium levels at 6 months or longer. Patients who encountered operative failures were compared with patients who were successfully cured. Results Eighty-eight pHPT patients, consisting of 29 men and 59 women, were finally enrolled. The median follow-up duration was 15.9 months (IQR, 6.1–31.5 months). Seventy-eight patients (78/88, 88.6%) were cured. Ten (10/88, 11.4%) patients experienced operative failure, including 9 persistent pHPT (10.2%) and 1 (1.1%) recurrent pHPT. Small parathyroid nodules (maximum diameter < 0.6 cm) and incomplete ablation were the two key factors leading to operative failure. Of the 9 patients with a maximum nodule diameter less than 0.6 cm, 77.8% (7/9) of them encountered operative failure. Conclusion Operative failure occurred in 11.4% of the pHPT patients who underwent MWA. The possibility of operative failure was increased when the maximum diameter of parathyroid nodule was less than 0.6 cm. Complete ablation could help avoid operative failure. Key Points • Failed to ablate the target lesion and incomplete ablation were the key factors attributed to operative failures. • When the maximum diameter of the parathyroid nodules is less than 0.6 cm, the possibility of operative failure was higher.

Published
2020

32. Ultrasound-guided thermal ablation for papillary thyroid microcarcinoma: a multicenter retrospective study

Author

Cao, Xiao-Jing, primary, Yu, Ming-An, additional, Zhu, Ya-Lin, additional, Qi, Lu, additional, Cong, Zhi-Bin, additional, Yan, Guo-Zhen, additional, Liu, Juan, additional, Wang, Hong-Ling, additional, Liu, Geng, additional, Guo, Jian-Qin, additional, Hao, Ying, additional, Wang, Zhong-Hua, additional, Wang, Xue, additional, He, Jun-Feng, additional, Shataer, Aini, additional, Liu, Xiao-Fang, additional, Zhao, Zhen-Long, additional, Wei, Ying, additional, Peng, Li-Li, additional, Li, Yan, additional, Wang, Shu-Rong, additional, and Che, Ying, additional

Published
2021
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34. Efficacy and Safety of Thermal Ablation for Solitary T1bN0M0 Papillary Thyroid Carcinoma: A Multicenter Study

Author

Cao, Xiao-Jing, primary, Liu, Juan, additional, Zhu, Ya-Lin, additional, Qi, Lu, additional, Liu, Geng, additional, Wang, Hong-Ling, additional, Wang, Zhong-Hua, additional, Zhou, Ying, additional, He, Jun-Feng, additional, Guo, Jian-Qin, additional, Shi, Li-Li, additional, Jian, Mei, additional, Shataer, Aini, additional, Yan, Guo-Zhen, additional, Zhao, Zhen-Long, additional, Wei, Ying, additional, Peng, Li-Li, additional, Li, Yan, additional, Che, Ying, additional, Wang, Shu-Rong, additional, and Yu, Ming-An, additional

Published
2020
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42. Effectiveness and Safety of Thermal Ablation in the Treatment of Primary Hyperparathyroidism: A Multicenter Study.

Author

Ying Wei, Cheng-Zhong Peng, Shu-Rong Wang, Jun-Feng He, Li-Li Peng, Zhen-Long Zhao, Xiao-Jing Cao, Yan Li, Ming-An Yu, Wei, Ying, Peng, Cheng-Zhong, Wang, Shu-Rong, He, Jun-Feng, Peng, Li-Li, Zhao, Zhen-Long, Cao, Xiao-Jing, Li, Yan, and Yu, Ming-An

Subjects
PARATHYROID glands, CALCIUM metabolism, HYPERPARATHYROIDISM, SINGLE-photon emission computed tomography, RECURRENT laryngeal nerve, HIGH-intensity focused ultrasound, RESEARCH, RESEARCH methodology, CATHETER ablation, MICROWAVES, RETROSPECTIVE studies, MEDICAL cooperation, EVALUATION research, COMPARATIVE studies, RESEARCH funding
Abstract

Purpose: To evaluate the effectiveness and safety of thermal ablation for primary hyperparathyroidism (pHPT).Materials and Methods: From January 2015 to March 2020, data pertaining to patients who received thermal ablation for pHPT at 4 centers were retrospectively analyzed. The median follow-up duration was 18.1months (IQR: 6.5-42.2 months). A cure referred to the reestablishment of normal values of serum calcium and intact parathyroid hormone (iPTH) throughout the entire follow-up period, at least more than 6 months. The technical success, effectiveness, and safety of treatment were analyzed.Results: 119 patients (mean age, 57.2 ± 16.3 years; 81 female) with 134 parathyroid nodules were enrolled. The mean maximum diameter of the parathyroid glands was 1.6 ± 0.9 cm. Ninety-six patients underwent microwave ablation (MWA), and 23 patients underwent radiofrequency ablation (RFA). The technical success rate was 98.3% and the cure rate was 89.9%. Significant differences were found in the maximum diameter between the cured patients and the patients who did not undergo ablation of the target lesions. Except the cases with pHPT nodules<0.6cm in diameter, the cure rate was 95%. There were no difference in cure rates at 6 months between the MWA and RFA (MWA vs. RFA, 90.6% vs. 87.0%; χ2=0.275, p = 0.699). The volume reduction rate of the ablation zone was 94.6% at 12 months. The complication rate was 6.7% (8/119). Except one patient with persistent voice impairment, other symptoms were spontaneously resolved within six months.Conclusion: Thermal ablation was effective and safe for pHPT. [ABSTRACT FROM AUTHOR]

Published
2021
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43. Theoretical Evaluation of Microwave Ablation Applied on Muscle, Fat and Bone: A Numerical Study.

Author

Chen, Cheng, Yu, Ming-An, Qiu, Lin, Chen, Hong-Yu, Zhao, Zhen-Long, Wu, Jie, Peng, Li-Li, Wang, Zhi-Liang, and Xiao, Ruo-Xiu

Subjects
COSMIC background radiation, TEMPERATURE distribution, MICROWAVES, FAT, HEAT transfer
Abstract

(1) Background: Microwave ablation (MWA) is a common tumor ablation surgery. Because of the high temperature of the ablation antenna, it is strongly destructive to surrounding vital tissues, resulting in high professional requirements for clinicians. The method used to carry out temperature observation and damage prediction in MWA is significant; (2) Methods: This work employs numerical study to explore temperature distribution of typical tissues in MWA. Firstly, clinical MWA based on isolated biological tissue is implemented. Then, the Pennes models and microwave radiation physics are established based on experimental parameters and existing related research. Initial values and boundary conditions are adjusted to better meet the real clinical materials and experimental conditions. Finally, clinical MWA data test this model. On the premise that the model is matched with clinical MWA, fat and bone are deduced for further heat transfer analysis. (3) Results: Numerical study obtains the temperature distribution of biological tissue in MWA. It observes the heat transfer law of ablation antenna in biological tissue. Additionally, combined with temperature threshold, it generates thermal damage of biological tissues and predicts the possible risks in MWA; (4) Conclusions: This work proposes a numerical study of typical biological tissues. It provides a new theoretical basis for clinically thermal ablation surgery. [ABSTRACT FROM AUTHOR]

Published
2021
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46. Microwave Ablation versus Surgical Resection for US-detected Multifocal T1N0M0 Papillary Thyroid Carcinoma: A 10-Center Study

Author

Zhao, Zhen-Long, Wang, Shu-Rong, Dong, Gang, Liu, Ying, He, Jun-Feng, Shi, Li-Li, Guo, Jian-Qin, Wang, Zhong-Hua, Cong, Zhi-Bin, Liu, Li-Hong, Yang, Bei-Bei, Qu, Chun-Ping, Niu, Wen-Quan, Wei, Ying, Peng, Li-Li, Li, Yan, Lu, Nai-Cong, Wu, Jie, and Yu, Ming-An

Abstract

A 10-center study found no evidence of a significant difference in progression-free survival rate between microwave ablation (MWA) and surgical resection for US-detected multifocal T1N0M0 papillary thyroid carcinoma, with MWA resulting in fewer complications.

Published
2024
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47. Risk Factors of Severe Hypocalcemia After US‐Guided Percutaneous Microwave Ablation of the Parathyroid Gland in Patients with Secondary Hyperparathyroidism.

Author

Wei, Ying, Peng, Li‐li, Zhao, Zhen‐long, Li, Yan, and Yu, Ming‐an

Abstract

Our aim was to identify potential risk factors associated with severe hypocalcemia (SH) after microwave ablation (MWA) in patients with secondary hyperparathyroidism (SHPT). This retrospective cross‐sectional study enrolled 204 consecutive patients (with 387 parathyroid glands) who underwent MWA between July 2015 and May 2018. Clinical parameters, laboratory indices, and parathyroid gland characteristics were analyzed to assess risk factors associated with SH after MWA. SH was defined as serum calcium level lower than 1.875 mmol/L (7.5 mg/dL) after MWA. Two models (I and II) for pre‐MWA and post‐MWA prediction were established, respectively. In accordance with the KDIGO guidelines, the target value for intact parathyroid hormone (iPTH) less than 300 pg/mL within 7 days after MWA was considered as a successful procedure. The success rate of MWA was 71.6% (146/204). The incidence of hypocalcemia and SH after MWA was 35.8% and 22.06%, respectively. The pre‐MWA prediction models I and II showed that high pre‐MWA iPTH, a dramatic reduction in iPTH, low pre‐MWA serum calcium, multiple ablated gland, and lack of pruritus symptoms were risk factors for developing SH. The accuracy (82.23% versus 83.25% in models I and II, respectively), sensitivity (34.88% versus 44.19%), specificity (95.45% versus 94.59%), positive predictive value (PPV) (68.18% versus 70.37%), and negative predictive value (NPV) (84% versus 85.37%) of both models were promising. The logistic regression fitting of the nomograms showed high prediction efficiency (0.845 and 0.863). High pre‐MWA iPTH, dramatic reductions in iPTH, low pre‐MWA serum calcium, multiple gland ablation, and no pruritus symptoms were predictors of SH. © 2019 American Society for Bone and Mineral Research. [ABSTRACT FROM AUTHOR]

Published
2020
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