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Zeng X, Tao H, Dong Y, Zhang Y, Yang J, Xuan F, Zhou J, Jia W, Liu J, Dai C, Hu H, Xiang N, Zeng N, Zhou W, Lau W, Yang J, Fang C. Impact of three-dimensional reconstruction visualization technology on short-term and long-term outcomes after hepatectomy in patients with hepatocellular carcinoma: a propensity-score-matched and inverse probability of treatment-weighted multicenter study. Int J Surg 2024; 110:1663-1676. [PMID: 38241321 PMCID: PMC10942183 DOI: 10.1097/js9.0000000000001047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/20/2023] [Indexed: 01/21/2024]
Abstract
BACKGROUND Three-dimensional reconstruction visualization technology (3D-RVT) is an important tool in the preoperative assessment of patients undergoing liver resection. However, it is not clear whether this technique can improve short-term and long-term outcomes in patients with hepatocellular carcinoma (HCC) compared with two-dimensional (2D) imaging. METHOD A total of 3402 patients from five centers were consecutively enrolled from January 2016 to December 2020, and grouped based on the use of 3D-RVT or 2D imaging for preoperative assessment. Baseline characteristics were balanced using propensity score matching (PSM, 1:1) and stabilized inverse probability of treatment-weighting (IPTW) to reduce potential selection bias. The perioperative outcomes, long-term overall survival (OS), and recurrence-free survival (RFS) were compared between the two groups. Cox-regression analysis was used to identify the risk factors associated with RFS. RESULTS A total of 1681 patients underwent 3D-RVT assessment before hepatectomy (3D group), while 1721 patients used 2D assessment (2D group). The PSM cohort included 892 patient pairs. In the IPTW cohort, there were 1608.3 patients in the 3D group and 1777.9 patients in the 2D group. In both cohorts, the 3D group had shorter operation times, lower morbidity and liver failure rates, as well as shorter postoperative hospital stays. The 3D group had more margins ≥10 mm and better RFS than the 2D group. The presence of tumors with a diameter ≥5 cm, intraoperative blood transfusion and multiple tumors were identified as independent risk factors for RFS, while 3D assessment and anatomical resection were independent protective factors. CONCLUSION In this multicenter study, perioperative outcomes and RFS of HCC patients following 3D-RVT assessment were significantly different from those following 2D imaging assessment. Thus, 3D-RVT may be a feasible alternative assessment method before hepatectomy for these patients.
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Affiliation(s)
- Xiaojun Zeng
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Haisu Tao
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Yanchen Dong
- School of Traditional Chinese Medicine, Southern Medical University
| | - Yuwei Zhang
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Junying Yang
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Feichao Xuan
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Jian Zhou
- Department of Liver Surgery, Zhongshan Hospital, Fudan University
| | - Weidong Jia
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei
| | - Jingfeng Liu
- Liver Department, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou
| | - Chaoliu Dai
- Department of the Second General Surgery, Shengjing Hospital of China Medical University, Shenyang
| | - Haoyu Hu
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Nan Xiang
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Ning Zeng
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Weiping Zhou
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai
| | - Wanyee Lau
- Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, People’s Republic of China
| | - Jian Yang
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
| | - Chihua Fang
- Department of Hepatobiliary Surgery, Zhujiang Hospital
- Guangdong Provincial Clinical and Engineering Center of Digital Medicine, Guangzhou
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Huang X, Hao X, Pan B, Liang X, Wang Z, Feng S, Pei P, Zhang H. Flame Imaging Technology Based on 64-Pixel Area Array Sensor. Micromachines (Basel) 2023; 15:44. [PMID: 38258163 PMCID: PMC10820706 DOI: 10.3390/mi15010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 12/22/2023] [Accepted: 12/23/2023] [Indexed: 01/24/2024]
Abstract
High-resolution flame temperature images are essential indicators for evaluating combustion conditions. Tunable diode laser absorption spectroscopy (TDLAS) is an effective combustion diagnostic method. In actual engineering, due to the limitation of line-of-sight (LOS) measurement, TDLAS technology has the problems of small data volume and low dimensionality in measuring combustion fields, which seriously limits the development of TDLAS in combustion diagnosis. This article demonstrates a TDLAS imaging method based on a 64-pixel area array sensor to reconstruct the two-dimensional temperature field of the flame. This paper verifies the robustness of the Algebraic Reconstruction Technique (ART) algorithm through numerical simulation and studies the effects of temperature, concentration, and pressure on the second harmonic intensity based on the HITRAN database. The two-dimensional temperature field of the flame was reconstructed, and reconstruction accuracy was verified using thermocouples. The maximum relative error was 3.71%. The TDLAS detection system based on a 64-pixel area array sensor provides a way to develop high-precision, high-complexity flame temperature measurement technology.
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Affiliation(s)
- Xiaodong Huang
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
| | - Xiaojian Hao
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
| | - Baowu Pan
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;
| | - Xiaodong Liang
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
| | - Zheng Wang
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
| | - Shenxiang Feng
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
| | - Pan Pei
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China; (X.H.); (X.L.); (Z.W.); (S.F.); (P.P.)
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China;
| | - Heng Zhang
- Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and System Integration, Jincheng 048000, China;
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Luo K, Zhang X, Cao C, Wu Z, Qin K, Wang C, Li W, Chen L, Chen W. Continuous identification of the tea shoot tip and accurate positioning of picking points for a harvesting from standard plantations. Front Plant Sci 2023; 14:1211279. [PMID: 37885670 PMCID: PMC10598852 DOI: 10.3389/fpls.2023.1211279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 09/18/2023] [Indexed: 10/28/2023]
Abstract
To address the current problems of large positioning error, low picking efficiency, and high cost of tea shoot picking, a continuous and precise harvesting scheme for tea shoots based on a two-dimensional (2D) perspective is designed in this study. A high-speed harvesting method for tea shoots in a standardized tea plantation assembly line type was proposed. First, a 2D view recognition model of tea shoot tips in a multi-disturbance environment was constructed, and accurate picking point coordinates were determined by combining a skeleton algorithm and curve growth. To avoid the losses of recognition accuracy caused by the mistaken clamping of blades and vibrations during harvester operations, accurate control of the harvester was realized by combining path planning and the S-curve speed control function. The recognition accuracy for the verification set of the recognition model was 99.9%, and the mean average precision (0.5:0.95) value was 0.97. The test results show that the error between the actual picking point position and the position determined by the model was within ± 3 mm, and the picking success rate was 83.6%. Therefore, we can realize fast and accurate picking of tea shoots and lay the foundation for continuous tea picking in the future by simplifying the identification and picking process.
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Affiliation(s)
- Kun Luo
- College of Mechanical Engineering, Tongling University, Tongling, China
- Key Laboratory of Construction Hydraulic Robots of Anhui Higher Education Institutes, Tongling University, Tongling, China
- Advanced Copper-based Material Industry Generic Technology Research Center of Anhui Province, Tongling University, Tongling, China
| | - Xuechen Zhang
- School of Engineering, Anhui Agricultural University, Hefei, China
| | - Chengmao Cao
- School of Engineering, Anhui Agricultural University, Hefei, China
| | - Zhengmin Wu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
| | - Kuan Qin
- School of Engineering, Anhui Agricultural University, Hefei, China
| | - Chuan Wang
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Weiqing Li
- School of Engineering, Anhui Agricultural University, Hefei, China
| | - Le Chen
- School of Engineering, Anhui Agricultural University, Hefei, China
| | - Wei Chen
- Institute of Agricultural Engineering, Anhui Academy of Agricultural Sciences, Hefei, China
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Prasad A, Duchová H, Manoharan RR, Rathi D, Pospíšil P. Imaging and Characterization of Oxidative Protein Modifications in Skin. Int J Mol Sci 2023; 24. [PMID: 36835390 DOI: 10.3390/ijms24043981] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/04/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Skin plays an important role in protection, metabolism, thermoregulation, sensation, and excretion whilst being consistently exposed to environmental aggression, including biotic and abiotic stresses. During the generation of oxidative stress in the skin, the epidermal and dermal cells are generally regarded as the most affected regions. The participation of reactive oxygen species (ROS) as a result of environmental fluctuations has been experimentally proven by several researchers and is well known to contribute to ultra-weak photon emission via the oxidation of biomolecules (lipids, proteins, and nucleic acids). More recently, ultra-weak photon emission detection techniques have been introduced to investigate the conditions of oxidative stress in various living systems in in vivo, ex vivo and in vitro studies. Research into two-dimensional photon imaging is drawing growing attention because of its application as a non-invasive tool. We monitored spontaneous and stress-induced ultra-weak photon emission under the exogenous application of a Fenton reagent. The results showed a marked difference in the ultra-weak photon emission. Overall, these results suggest that triplet carbonyl (3C=O∗) and singlet oxygen (1O2) are the final emitters. Furthermore, the formation of oxidatively modified protein adducts and protein carbonyl formation upon treatment with hydrogen peroxide (H2O2) were observed using an immunoblotting assay. The results from this study broaden our understanding of the mechanism of the generation of ROS in skin layers and the formation/contribution of various excited species can be used as tools to determine the physiological state of the organism.
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Alkhodari M, Zakaria A, Qaddoumi N. Monitoring Bone Density Using Microwave Tomography of Human Legs: A Numerical Feasibility Study. Sensors (Basel) 2021; 21:7078. [PMID: 34770384 PMCID: PMC8588325 DOI: 10.3390/s21217078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/13/2021] [Accepted: 10/20/2021] [Indexed: 11/30/2022]
Abstract
A major cause of bone mass loss worldwide is osteoporosis. X-ray is considered to be the gold-standard technique to diagnose this disease. However, there is currently a need for an alternative modality due to the ionizing radiations used in X-rays. In this vein, we conducted a numerical study herein to investigate the feasibility of using microwave tomography (MWT) to detect bone density variations that are correlated to variations in the complex relative permittivity within the reconstructed images. This study was performed using an in-house finite-element method contrast source inversion algorithm (FEM-CSI). Three anatomically-realistic human leg models based on magnetic resonance imaging reconstructions were created. Each model represents a leg with a distinct fat layer thickness; thus, the three models are for legs with thin, medium, and thick fat layers. In addition to using conventional matching media in the numerical study, the use of commercially available and cheap ultrasound gel was evaluated prior to bone image analysis. The inversion algorithm successfully localized bones in the thin and medium fat scenarios. In addition, bone volume variations were found to be inversely proportional to their relative permittivity in the reconstructed images with the root mean square error as low as 2.54. The observations found in this study suggest MWT as a promising bone imaging modality owing to its safe and non-ionizing radiations used in imaging objects with high quality.
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Affiliation(s)
- Mohanad Alkhodari
- Department of Electrical Engineering, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates; (A.Z.); (N.Q.)
- Department of Biomedical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
| | - Amer Zakaria
- Department of Electrical Engineering, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates; (A.Z.); (N.Q.)
| | - Nasser Qaddoumi
- Department of Electrical Engineering, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates; (A.Z.); (N.Q.)
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Weng J, Kashiwakura S, Wagatsuma K. Effect of Plasma Gas and the Pressure on Spatially and Temporally Resolved Images of Copper Emission Lines in Laser Induced Plasma Optical Emission Spectrometry. ANAL SCI 2020; 37:367-375. [PMID: 33100304 DOI: 10.2116/analsci.20p203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper investigated two-dimensional spatial and temporal images of a copper emission line in laser-induced breakdown spectroscopy (LIBS), in order to clarify the excitation/de-excitation processes occurring in a laser-induced plasma. The measurements were carried out under different plasma gases (argon, krypton, helium, and nitrogen), pressure levels (100 - 900 Pa) and delay times (100 - 1000 ns) with the aim of monitoring their effects on the behavior of the copper emission. Depending on the plasma gas type and the pressure level, large differences were found in the plasma shape and temporal intensity evolution of the copper emission profile. Namely, krypton produced the most compact plasma emitting larger intensities, compared to argon and helium, and an increase in the gas pressure made these plasmas to shrink, which could be related principally to the stopping power of the applied gases. Through temporally resolved analysis, the delay profiles could be obtained for each plasma gas, indicating that the helium plasma disappeared more rapidly than the argon and krypton plasmas. It was suggested that the variations in the emission intensity would be determined by interactions between gas particles and highly energetic particles in the plasma breakdown as well as interactions between excited gas particles and copper species during plasma expansion. These insights could prove to be useful in the understanding of the background of LIBS as well as the optimization of its practical applications.
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Affiliation(s)
- Julian Weng
- Institute for Materials Research, Tohoku University
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Tanida H, Yamashige H, Orikasa Y, Oishi M, Takanashi Y, Fujimoto T, Sato K, Takamatsu D, Murayama H, Arai H, Matsubara E, Uchimoto Y, Ogumi Z. In situ two-dimensional imaging quick-scanning XAFS with pixel array detector. J Synchrotron Radiat 2011; 18:919-922. [PMID: 21997918 PMCID: PMC3210723 DOI: 10.1107/s0909049511031232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 08/02/2011] [Indexed: 05/28/2023]
Abstract
Quick-scanning X-ray absorption fine structure (XAFS) measurements were performed in transmission mode using a PILATUS 100K pixel array detector (PAD). The method can display a two-dimensional image for a large area of the order of a centimetre with a spatial resolution of 0.2 mm at each energy point in the XAFS spectrum. The time resolution of the quick-scanning method ranged from 10 s to 1 min per spectrum depending on the energy range. The PAD has a wide dynamic range and low noise, so the obtained spectra have a good signal-to-noise ratio.
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Hu B, Zeng N, Liu Z, Ji Y, Xie W, Peng Q, Zhou Y, He Y, Ma H. Two-dimensional singlet oxygen imaging with its near-infrared luminescence during photosensitization. J Biomed Opt 2011; 16:016003. [PMID: 21280909 PMCID: PMC4570115 DOI: 10.1117/1.3528593] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 11/07/2010] [Accepted: 11/09/2010] [Indexed: 05/19/2023]
Abstract
Photodynamic therapy is a promising cancer treatment that involves activation of photosensitizer by visible light to create singlet oxygen. This highly reactive oxygen species is believed to induce cell death and tissue destruction in PDT. Our approach used a near-infrared area CCD with high quantum efficiency to detect singlet oxygen by its 1270-nm luminescence. Two-dimensional singlet oxygen images with its near-infrared luminescence during photosensitization could be obtained with a CCD integration time of 1 s, without scanning. Thus this system can produce singlet oxygen luminescence images faster and achieve more accurate measurements in comparison to raster-scanning methods. The experimental data show a linear relationship between the singlet oxygen luminescence intensity and sample concentration. This method provides a detection sensitivity of 0.0181 μg∕ml (benzoporphyrin derivative monoacid ring A dissolved in ethanol) and a spatial resolution better than 50 μm. A pilot study was conducted on a total of six female Kunming mice. The results from this study demonstrate the system's potential for in vivo measurements. Further experiments were carried out on two tumor-bearing nude mice. Singlet oxygen luminescence images were acquired from the tumor-bearing nude mouse with intravenous injection of BPD-MA, and the experimental results showed real-time singlet oxygen signal depletion as a function of the light exposure.
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Affiliation(s)
- Bolin Hu
- Tsinghua University, Laboratory of Optical Imaging and Sensing, Graduate School at Shenzhen, Shenzhen, 518055, China
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