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Wang Z, Li J, Sun Y. Layered Fusion Reconstruction Based on Fuzzy Features for Multi-Conductivity Electrical Impedance Tomography. SENSORS (BASEL, SWITZERLAND) 2024; 24:3380. [PMID: 38894168 PMCID: PMC11175079 DOI: 10.3390/s24113380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/21/2024]
Abstract
In medical imaging, detecting tissue anomalies is vital for accurate diagnosis and effective treatment. Electrical impedance tomography (EIT) is a non-invasive technique that monitors the changes in electrical conductivity within tissues in real time. However, the current challenge lies in simply and accurately reconstructing multi-conductivity distributions. This paper introduces a layered fusion framework for EIT to enhance imaging in multi-conductivity scenarios. The method begins with pre-imaging and extracts the main object from the fuzzy image to form one layer. Then, the voltage difference in the other layer, where the local anomaly is located, is estimated. Finally, the corresponding conductivity distribution is established, and multiple layers are fused to reconstruct the multi-conductivity distribution. The simulation and experimental results demonstrate that compared to traditional methods, the proposed method significantly improves multi-conductivity separation, precise anomaly localization, and robustness without adding uncertain parameters. Notably, the proposed method has demonstrated exceptional accuracy in local anomaly detection, with positional errors as low as 1% and size errors as low as 33%, which significantly outperforms the traditional method with respective minimum errors of 9% and 228%. This method ensures a balance between the simplicity and accuracy of the algorithm. At the same time, it breaks the constraints of traditional linear methods, struggling to identify multi-conductivity distributions, thereby providing new perspectives for clinical EIT.
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Affiliation(s)
- Zeying Wang
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jiaqing Li
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yixuan Sun
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
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Simonte R, Cammarota G, Vetrugno L, De Robertis E, Longhini F, Spadaro S. Advanced Respiratory Monitoring during Extracorporeal Membrane Oxygenation. J Clin Med 2024; 13:2541. [PMID: 38731069 PMCID: PMC11084162 DOI: 10.3390/jcm13092541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
Advanced respiratory monitoring encompasses a diverse range of mini- or noninvasive tools used to evaluate various aspects of respiratory function in patients experiencing acute respiratory failure, including those requiring extracorporeal membrane oxygenation (ECMO) support. Among these techniques, key modalities include esophageal pressure measurement (including derived pressures), lung and respiratory muscle ultrasounds, electrical impedance tomography, the monitoring of diaphragm electrical activity, and assessment of flow index. These tools play a critical role in assessing essential parameters such as lung recruitment and overdistention, lung aeration and morphology, ventilation/perfusion distribution, inspiratory effort, respiratory drive, respiratory muscle contraction, and patient-ventilator synchrony. In contrast to conventional methods, advanced respiratory monitoring offers a deeper understanding of pathological changes in lung aeration caused by underlying diseases. Moreover, it allows for meticulous tracking of responses to therapeutic interventions, aiding in the development of personalized respiratory support strategies aimed at preserving lung function and respiratory muscle integrity. The integration of advanced respiratory monitoring represents a significant advancement in the clinical management of acute respiratory failure. It serves as a cornerstone in scenarios where treatment strategies rely on tailored approaches, empowering clinicians to make informed decisions about intervention selection and adjustment. By enabling real-time assessment and modification of respiratory support, advanced monitoring not only optimizes care for patients with acute respiratory distress syndrome but also contributes to improved outcomes and enhanced patient safety.
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Affiliation(s)
- Rachele Simonte
- Department of Medicine and Surgery, Università degli Studi di Perugia, 06100 Perugia, Italy; (R.S.); (E.D.R.)
| | - Gianmaria Cammarota
- Department of Translational Medicine, Università del Piemonte Orientale, 28100 Novara, Italy;
| | - Luigi Vetrugno
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, 66100 Chieti, Italy;
| | - Edoardo De Robertis
- Department of Medicine and Surgery, Università degli Studi di Perugia, 06100 Perugia, Italy; (R.S.); (E.D.R.)
| | - Federico Longhini
- Department of Medical and Surgical Sciences, Università della Magna Graecia, 88100 Catanzaro, Italy
- Anesthesia and Intensive Care Unit, “R. Dulbecco” University Hospital, 88100 Catanzaro, Italy
| | - Savino Spadaro
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, 44100 Ferrara, Italy;
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Gao Y, Zhang K, Li M, Yuan S, Wang Q, Chi Y, Long Y, Zhao Z, He H. Feasibility of 3D-EIT in identifying lung perfusion defect and V/Q mismatch in a patient with VA-ECMO. Crit Care 2024; 28:90. [PMID: 38509551 PMCID: PMC10956177 DOI: 10.1186/s13054-024-04865-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 03/08/2024] [Indexed: 03/22/2024] Open
Affiliation(s)
- Yelin Gao
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ke Zhang
- Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology (BNRist), Institute of Precision Medicine, Tsinghua University, Beijing, 100084, China
| | - Maokun Li
- Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology (BNRist), Institute of Precision Medicine, Tsinghua University, Beijing, 100084, China
| | - Siyi Yuan
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Qianlin Wang
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yi Chi
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yun Long
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Zhanqi Zhao
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
- School of Biomedical Engineering, Guangzhou Medical University, Guangzhou, China
- Institute of Technical Medicine, Furtwangen University, Villingen-Schwenningen, Germany
| | - Huaiwu He
- State Key Laboratory of Complex Severe and Rare Diseases, Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
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Ding C, Zhu Y, Zhang S, Zhao Z, Gao Y, Li Z. Bedside electrical impedance tomography to assist the management of pulmonary embolism: A case report. Heliyon 2024; 10:e25159. [PMID: 38322858 PMCID: PMC10844270 DOI: 10.1016/j.heliyon.2024.e25159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 01/05/2024] [Accepted: 01/22/2024] [Indexed: 02/08/2024] Open
Abstract
Background Pulmonary embolism (PE) is a common worldwide disease with high mortality. Timely diagnosis and management of PE could significantly improve clinical outcomes. Electrical impedance tomography (EIT) is a novel noninvasive technique to monitor lung perfusion and help detect PE at the bedside. Here we present a case of clinical management of subsegmental PE with the help of the bilateral ventilation and perfusion(V/Q) asymmetry EIT image. Case presentation A 72-year-old cancer patient with respiratory failure and acute kidney injury in the intensive care unit was suspected of PE based on his clinical manifestation. The contraindication of computed tomography pulmonary angiography (CTPA) for PE diagnosis prevented escalating anticoagulation therapy. Besides EIT ventilation and perfusion monitoring showed an abnormal asymmetry V/Q match between the bilateral lungs which promoted our decision to start systemic continuous anticoagulation therapy and improved the patient clinically. The following CTPA which clarified the diagnosis of PE suggests that the patient has benefited from our decision. Conclusion For critically ill patients with suspected PE, the asymmetry of the EIT V/Q image may provide crucial objective information for clinical management.
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Affiliation(s)
- Chenling Ding
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Yibo Zhu
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Shuyi Zhang
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Zhanqi Zhao
- School of Biomedical Engineering, Guangzhou Medical University, Guangzhou, China
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Beijing, China
- Institute of Technical Medicine, Furtwangen University, Villingen-Schwenningen, Germany
| | - Yuan Gao
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Zhe Li
- Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
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Wang Z, Sun Y, Li J. Posterior Approximate Clustering-Based Sensitivity Matrix Decomposition for Electrical Impedance Tomography. SENSORS (BASEL, SWITZERLAND) 2024; 24:333. [PMID: 38257426 PMCID: PMC10818843 DOI: 10.3390/s24020333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/19/2023] [Accepted: 12/29/2023] [Indexed: 01/24/2024]
Abstract
This paper introduces a sensitivity matrix decomposition regularization (SMDR) method for electric impedance tomography (EIT). Using k-means clustering, the EIT-reconstructed image can be divided into four clusters, derived based on image features, representing posterior information. The sensitivity matrix is then decomposed into distinct work areas based on these clusters. The elimination of smooth edge effects is achieved through differentiation of the images from the decomposed sensitivity matrix and further post-processing reliant on image features. The algorithm ensures low computational complexity and avoids introducing extra parameters. Numerical simulations and experimental data verification highlight the effectiveness of SMDR. The proposed SMDR algorithm demonstrates higher accuracy and robustness compared to the typical Tikhonov regularization and the iterative penalty term-based regularization method (with an improvement of up to 0.1156 in correlation coefficient). Moreover, SMDR achieves a harmonious balance between image fidelity and sparsity, effectively addressing practical application requirements.
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Affiliation(s)
- Zeying Wang
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yixuan Sun
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jiaqing Li
- School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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