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Boregowda G, Mariappan P. Effect of high blood flow on heat distribution and ablation zone during microwave ablation-numerical approach. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2024; 40:e3835. [PMID: 38800993 DOI: 10.1002/cnm.3835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/29/2024] [Accepted: 05/04/2024] [Indexed: 05/29/2024]
Abstract
Microwave ablation has become a viable alternative for cancer treatment for patients who cannot undergo surgery. During this procedure, a single-slot coaxial antenna is employed to effectively deliver microwave energy to the targeted tissue. The success of the treatment was measured by the amount of ablation zone created during the ablation procedure. The significantly large blood vessel placed near the antenna causes heat dissipation by convection around the blood vessel. The heat sink effect could result in insufficient ablation, raising the risk of local tumor recurrence. In this study, we investigated the heat loss due to large blood vessels and the relationship between blood velocity and temperature distribution. The hepatic artery, with a diameter of 4 mm and a height of 50 mm and two branches, is considered in the computational domain. The temperature profile, localized tissue contraction, and ablation zones were simulated for initial blood velocities 0.05, 0.1, and 0.16 m/s using the 3D Pennes bio-heat equation, temperature-time dependent model, and cell death model, respectively. Temperature-dependent blood velocity is modeled using the Navier-Stokes equation, and the fluid-solid interaction boundary is treated as a convective boundary. For discretization, we utilized H curl Ω elements for the wave propagation model,H 1 Ω elements for the Pennes bio-heat model, andH 1 Ω 3 × L 0 2 Ω elements for the Navier-Stokes equation, where Ω represents the computational domain. The simulated results show that blood vessels and blood velocity have a significant impact on temperature distribution, tissue contraction, and the volume of the ablation zone.
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Affiliation(s)
- Gangadhara Boregowda
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Tirupati, India
| | - Panchatcharam Mariappan
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Tirupati, India
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Asafu Adjaye Frimpong G, Asante E, Mahama F, Aboagye E, Asare A. Microwave Thermal Ablation for Breast Cancer in Africa: A Pioneering Case Report Utilizing TATOpro. Cureus 2024; 16:e64029. [PMID: 38983673 PMCID: PMC11233127 DOI: 10.7759/cureus.64029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2024] [Indexed: 07/11/2024] Open
Abstract
The adoption of minimally invasive treatments for early-stage breast cancer is increasing. Microwave thermal ablation (MWA), a minimally invasive technique, has been studied for treating small breast cancer lesions. However, long-term evidence on its efficacy as a sole treatment is limited, as most studies combine MWA with other therapies and post-treatment surgical excision. This report details the case of an 83-year-old African patient who declined surgery and systemic therapies, opting for MWA using the TATOpro system as the sole treatment for contralateral breast cancer with axillary lymph node metastasis. The report includes a one-year follow-up, assessing disease recurrence with MRI and ultrasound. The findings highlight MWA's potential as an innovative and efficacious breast cancer treatment, emphasizing the need for adaptable strategies in oncology.
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Affiliation(s)
- George Asafu Adjaye Frimpong
- Radiology, Kwame Nkrumah University of Science and Technology, Kumasi, GHA
- Radiology, Spectra Health Imaging and Interventional Radiology, Kumasi, GHA
| | - Emmanuel Asante
- Research and Development, Spectra Health Imaging and Interventional Radiology, Kumasi, GHA
| | - Fairuuj Mahama
- Radiology, Spectra Health Imaging and Interventional Radiology, Kumasi, GHA
| | - Evans Aboagye
- Research and Development, Spectra Health Imaging and Interventional Radiology, Kumasi, GHA
| | - Adwoa Asare
- Oncology, Komfo Anokye Teaching Hospital, Kumasi, GHA
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Heshmat A, O’Connor CS, Albuquerque Marques Silva J, Paolucci I, Jones AK, Odisio BC, Brock KK. Using Patient-Specific 3D Modeling and Simulations to Optimize Microwave Ablation Therapy for Liver Cancer. Cancers (Basel) 2024; 16:2095. [PMID: 38893214 PMCID: PMC11171243 DOI: 10.3390/cancers16112095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 05/25/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Microwave ablation (MWA) of liver tumors presents challenges like under- and over-ablation, potentially leading to inadequate tumor destruction and damage to healthy tissue. This study aims to develop personalized three-dimensional (3D) models to simulate MWA for liver tumors, incorporating patient-specific characteristics. The primary objective is to validate the predicted ablation zones compared to clinical outcomes, offering insights into MWA before therapy to facilitate accurate treatment planning. Contrast-enhanced CT images from three patients were used to create 3D models. The simulations used coupled electromagnetic wave propagation and bioheat transfer to estimate the temperature distribution, predicting tumor destruction and ablation margins. The findings indicate that prolonged ablation does not significantly improve tumor destruction once an adequate margin is achieved, although it increases tissue damage. There was a substantial overlap between the clinical ablation zones and the predicted ablation zones. For patient 1, the Dice score was 0.73, indicating high accuracy, with a sensitivity of 0.72 and a specificity of 0.76. For patient 2, the Dice score was 0.86, with a sensitivity of 0.79 and a specificity of 0.96. For patient 3, the Dice score was 0.8, with a sensitivity of 0.85 and a specificity of 0.74. Patient-specific 3D models demonstrate potential in accurately predicting ablation zones and optimizing MWA treatment strategies.
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Affiliation(s)
- Amirreza Heshmat
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (C.S.O.); (A.K.J.); (K.K.B.)
| | - Caleb S. O’Connor
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (C.S.O.); (A.K.J.); (K.K.B.)
| | - Jessica Albuquerque Marques Silva
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (J.A.M.S.); (I.P.); (B.C.O.)
| | - Iwan Paolucci
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (J.A.M.S.); (I.P.); (B.C.O.)
| | - Aaron Kyle Jones
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (C.S.O.); (A.K.J.); (K.K.B.)
| | - Bruno C. Odisio
- Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (J.A.M.S.); (I.P.); (B.C.O.)
| | - Kristy K. Brock
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA; (C.S.O.); (A.K.J.); (K.K.B.)
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Tehrani MHH, Moradi Kashkooli F, Soltani M. Spatiotemporal modeling of nano-delivered chemotherapeutics for synergistic microwave ablation cancer therapy. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2024; 247:108102. [PMID: 38447317 DOI: 10.1016/j.cmpb.2024.108102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 02/25/2024] [Accepted: 02/25/2024] [Indexed: 03/08/2024]
Abstract
BACKGROUND AND OBJECTIVE The effectiveness of current microwave ablation (MWA) therapies is limited. Administration of thermosensitive liposomes (TSLs) which release drugs in response to heat has presented a significant potential for enhancing the efficacy of thermal ablation treatment, and the benefits of targeted drug delivery. However, a complete knowledge of the mechanobiological processes underlying the drug release process, especially the intravascular drug release mechanism and its distribution in response to MWA needs to be improved. Multiscale computational-based modeling frameworks, integrating different biophysical phenomena, have recently emerged as promising tools to decipher the mechanobiological events in combo therapies. The present study aims to develop a novel multiscale computational model of TSLs delivery following MWA implantation. METHODS Due to the complex interplay between the heating procedure and the drug concentration maps, a computational model is developed to determine the intravascular release of doxorubicin from TSL, its transvascular transport into the interstitium, transport in the interstitium, and cell uptake. Computational models can estimate the interplays among liposome and drug properties, tumor perfusion, and heating regimen to examine the impact of essential parameters and to optimize a targeted drug delivery platform. RESULTS Results indicated that the synergy of TSLs with MWA allows more localized drug delivery with lower side effects. The drug release rate and tumor permeability play crucial roles in the efficacy of TSLs during MWA treatment. The computational model predicted an unencapsulated drug lime around the ablated zone, which can destroy more cancer cells compared to MWA alone by 40%. Administration of TSLs with a high release rate capacity can improve the percentage of killed cancer cells by 24%. Since the heating duration in MWA is less than 15 min, the presented combination therapy showed better performance for highly permeable tumors. CONCLUSION This study highlights the potential of the proposed computational framework to address complex and realistic scenarios in cancer treatment, which can serve as the future research foundation, including advancements in nanomedicine and optimizing the pair of TSL and MWA for both preclinical and clinical studies. The present model could be as a valuable tool for patient-specific calibration of essential parameters.
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Affiliation(s)
- Masoud H H Tehrani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran Iran
| | | | - M Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran Iran; Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Canada; Centre for Biotechnology and Bioengineering, University of Waterloo, Waterloo, ON, Canada.
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Piranfar A, Soltani M, Kashkooli FM, Uribe CF, Rahmim A. Spatiotemporal modeling of radiopharmaceutical transport in solid tumors: Application to 177Lu-PSMA therapy of prostate cancer. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2024; 245:108004. [PMID: 38215660 DOI: 10.1016/j.cmpb.2023.108004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 12/14/2023] [Accepted: 12/31/2023] [Indexed: 01/14/2024]
Abstract
BACKGROUND AND OBJECTIVE 177Lu-labeled prostate-specific membrane antigen (PSMA) radiopharmaceutical therapy (RPT) represents a pivotal advancement in addressing prostate cancer. However, existing therapies, while promising, remain incompletely understood and optimized. Computational models offer potential insights into RPTs, aiding in clinical drug delivery enhancement. In this study, we investigate the impact of various physiological parameters on the delivery of 177Lu-PSMA-617 RPT using the convection-diffusion-reaction (CDR) model. METHODS Our investigation encompasses tumor geometry and surrounding tissue, characterized by well-defined boundaries and initial conditions. Utilizing the finite element method, we solve governing equations across a range of parameters: dissociation constant KD (1, 0.1, 0.01 [nM]), internalization rate (0.01-0.0001 [min-1]), diverse tumor shapes, and variable necrotic zone sizes. This model can provide an accurate analysis of radiopharmaceutical delivery from the injection site to the tumor cell, including drug transport in the vascular, interstitial, and intracellular spaces, and considering important parameters (e.g., drug extravasation from microvessels or to lymphatic vessels, the extracellular matrix, receptors, and intracellular space). RESULTS Our findings reveal significant enhancements in tumor-absorbed doses as KD decreases. This outcome can be attributed to the higher affinity of radiopharmaceuticals for PSMA receptors as KD diminishes, facilitating a more efficient binding and retention of the therapeutic agent within the tumor microenvironment. Additionally, tumor-absorbed doses for KD ∼ 1 [nM] show an upward trend with higher internalization rates. This observation can be rationalized by considering that a greater internalization rate would result in a higher proportion of radiopharmaceuticals being taken up by tumor cells after binding to receptors on the cell surface. Notably, tumor shape and necrotic zone size exhibit limited influence on tumor absorbed dose. CONCLUSIONS The present study employs the CDR model to explore the role of physiological parameters in shaping 177Lu-PSMA-617 RPT delivery. These findings provide insights for improving prostate cancer therapy by understanding radiopharmaceutical transport dynamics. This computational approach contributes to advancing our understanding of radiopharmaceutical delivery mechanisms and has implications for enhancing treatment efficacy.
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Affiliation(s)
- Anahita Piranfar
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - M Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran; Department of Electrical and Computer Engineering, University of Waterloo, ON, Canada; Centre for Biotechnology and Bioengineering (CBB), University of Waterloo, Waterloo, ON, Canada; Department of Integrative Oncology, BC Cancer Research Institute, Vancouver, BC, Canada.
| | - Farshad M Kashkooli
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - Carlos F Uribe
- Department of Integrative Oncology, BC Cancer Research Institute, Vancouver, BC, Canada; Functional Imaging, BC Cancer, Vancouver, BC, Canada; Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Arman Rahmim
- Department of Integrative Oncology, BC Cancer Research Institute, Vancouver, BC, Canada; Functional Imaging, BC Cancer, Vancouver, BC, Canada; Department of Radiology, University of British Columbia, Vancouver, BC, Canada
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Servin F, Collins JA, Heiselman JS, Frederick-Dyer KC, Planz VB, Geevarghese SK, Brown DB, Jarnagin WR, Miga MI. Simulation of Image-Guided Microwave Ablation Therapy Using a Digital Twin Computational Model. IEEE OPEN JOURNAL OF ENGINEERING IN MEDICINE AND BIOLOGY 2023; 5:107-124. [PMID: 38445239 PMCID: PMC10914207 DOI: 10.1109/ojemb.2023.3345733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/14/2023] [Accepted: 12/04/2023] [Indexed: 03/07/2024] Open
Abstract
Emerging computational tools such as healthcare digital twin modeling are enabling the creation of patient-specific surgical planning, including microwave ablation to treat primary and secondary liver cancers. Healthcare digital twins (DTs) are anatomically one-to-one biophysical models constructed from structural, functional, and biomarker-based imaging data to simulate patient-specific therapies and guide clinical decision-making. In microwave ablation (MWA), tissue-specific factors including tissue perfusion, hepatic steatosis, and fibrosis affect therapeutic extent, but current thermal dosing guidelines do not account for these parameters. This study establishes an MR imaging framework to construct three-dimensional biophysical digital twins to predict ablation delivery in livers with 5 levels of fat content in the presence of a tumor. Four microwave antenna placement strategies were considered, and simulated microwave ablations were then performed using 915 MHz and 2450 MHz antennae in Tumor Naïve DTs (control), and Tumor Informed DTs at five grades of steatosis. Across the range of fatty liver steatosis grades, fat content was found to significantly increase ablation volumes by approximately 29-l42% in the Tumor Naïve and 55-60% in the Tumor Informed DTs in 915 MHz and 2450 MHz antenna simulations. The presence of tumor did not significantly affect ablation volumes within the same steatosis grade in 915 MHz simulations, but did significantly increase ablation volumes within mild-, moderate-, and high-fat steatosis grades in 2450 MHz simulations. An analysis of signed distance to agreement for placement strategies suggests that accounting for patient-specific tumor tissue properties significantly impacts ablation forecasting for the preoperative evaluation of ablation zone coverage.
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Affiliation(s)
- Frankangel Servin
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTN37235USA
- Vanderbilt Institute for Surgery and EngineeringVanderbilt UniversityNashvilleTN37235USA
| | - Jarrod A. Collins
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTN37235USA
| | - Jon S. Heiselman
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTN37235USA
- Vanderbilt Institute for Surgery and EngineeringVanderbilt UniversityNashvilleTN37235USA
- Department of Surgery, Hepatopancreatobiliary ServiceMemorial Sloan Kettering Cancer CenterNew YorkNY10065USA
| | | | - Virginia B. Planz
- Department of RadiologyVanderbilt University Medical CenterNashvilleTN37235USA
| | | | - Daniel B. Brown
- Department of RadiologyVanderbilt University Medical CenterNashvilleTN37235USA
| | - William R. Jarnagin
- Department of Surgery, Hepatopancreatobiliary ServiceMemorial Sloan Kettering Cancer CenterNew YorkNY10065USA
| | - Michael I. Miga
- Department of Biomedical EngineeringVanderbilt UniversityNashvilleTN37235USA
- Vanderbilt Institute for Surgery and EngineeringVanderbilt UniversityNashvilleTN37235USA
- Department of RadiologyVanderbilt University Medical CenterNashvilleTN37235USA
- Department of Neurological SurgeryVanderbilt University Medical CenterNashvilleTN37235USA
- Department of OtolaryngologyVanderbilt University Medical CenterNashvilleTN37235USA
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Lopes-Luz L, Fogaça MBT, Bentivoglio-Silva BG, Saavedra DP, Alves LM, Franca LV, Crispim GJB, de Andrade IA, Ribeiro BM, Nagata T, Bührer-Sékula S. A novel highly specific biotinylated MAC-ELISA for detection of anti-SARS-CoV-2 nucleocapsid antigen IgM antibodies during the acute phase of COVID-19. Braz J Microbiol 2023; 54:2893-2901. [PMID: 37930615 PMCID: PMC10689632 DOI: 10.1007/s42770-023-01160-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 10/19/2023] [Indexed: 11/07/2023] Open
Abstract
The gold standard for diagnosing COVID-19 in the acute phase is RT-qPCR. However, this molecular technique can yield false-negative results when nasopharyngeal swab collection is not conducted during viremia. To mitigate this challenge, the enzyme-linked immunosorbent assay (ELISA) identifies anti-SARS-CoV-2 IgM antibodies in the initial weeks after symptom onset, facilitating early COVID-19 diagnosis. This study introduces a novel and highly specific IgM antibody capture ELISA (MAC-ELISA), which utilizes biotinylated recombinant SARS-CoV-2 nucleocapsid (N) antigen produced in plants. Our biotinylated approach streamlines the procedure by eliminating the requirement for an anti-N-conjugated antibody, circumventing the need for peroxidase-labeled antigens, and preventing cross-reactivity with IgM autoantibodies such as rheumatoid factor. Performance evaluation of the assay involved assessing sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy using 682 RT-qPCR-positive samples, categorized by weeks relative to symptoms onset. Negative controls included 205 pre-pandemic serum samples and 46 serum samples from patients diagnosed with other diseases. Based on a cut-off of 0.087 and ROC curve analysis, the highest sensitivity of 81.2% was observed in the 8-14 days post-symptom (dps) group (2nd week), followed by sensitivities of 73.8% and 68.37% for the 1-7 dps (1st week) and 15-21 dps groups (3rd week), respectively. Specificity was consistently 100% across all groups. This newly developed biotinylated N-MAC-ELISA offers a more streamlined and cost-effective alternative to molecular diagnostics. It enables simultaneous testing of multiple samples and effectively identifies individuals with false-negative results.
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Affiliation(s)
- Leonardo Lopes-Luz
- Laboratório de Desenvolvimento e Produção de Testes Rápidos, Centro Multiusuário de Pesquisa de Bioinsumos e Tecnologias em Saúde, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
- Innovation Hub in Point of Care Technologies, Universidade Federal de Goiás-Merck S/A Alliance, Goiânia, GO, 74605-050, Brazil
| | - Matheus Bernardes Torres Fogaça
- Laboratório de Desenvolvimento e Produção de Testes Rápidos, Centro Multiusuário de Pesquisa de Bioinsumos e Tecnologias em Saúde, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
- Innovation Hub in Point of Care Technologies, Universidade Federal de Goiás-Merck S/A Alliance, Goiânia, GO, 74605-050, Brazil
| | | | - Djairo Pastor Saavedra
- Laboratório de Desenvolvimento e Produção de Testes Rápidos, Centro Multiusuário de Pesquisa de Bioinsumos e Tecnologias em Saúde, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
- Innovation Hub in Point of Care Technologies, Universidade Federal de Goiás-Merck S/A Alliance, Goiânia, GO, 74605-050, Brazil
| | - Luana Michele Alves
- Laboratório de Desenvolvimento e Produção de Testes Rápidos, Centro Multiusuário de Pesquisa de Bioinsumos e Tecnologias em Saúde, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil
- Innovation Hub in Point of Care Technologies, Universidade Federal de Goiás-Merck S/A Alliance, Goiânia, GO, 74605-050, Brazil
| | - Luísa Valério Franca
- Departamento de Biologia Celular, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | | | - Ikaro Alves de Andrade
- Departamento de Biologia Celular, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | - Bergmann Morais Ribeiro
- Departamento de Biologia Celular, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | - Tatsuya Nagata
- Departamento de Biologia Celular, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, DF, 70910-900, Brazil
| | - Samira Bührer-Sékula
- Laboratório de Desenvolvimento e Produção de Testes Rápidos, Centro Multiusuário de Pesquisa de Bioinsumos e Tecnologias em Saúde, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605-050, Brazil.
- Innovation Hub in Point of Care Technologies, Universidade Federal de Goiás-Merck S/A Alliance, Goiânia, GO, 74605-050, Brazil.
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Alemaryeen A, Noghanian S. A Survey of the Thermal Analysis of Implanted Antennas for Wireless Biomedical Devices. MICROMACHINES 2023; 14:1894. [PMID: 37893331 PMCID: PMC10609145 DOI: 10.3390/mi14101894] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/22/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023]
Abstract
Wireless implantable biomedical devices (IBDs) are emerging technologies used to enhance patient treatment and monitoring. The performance of wireless IBDs mainly relies on their antennas. Concerns have emerged regarding the potential of wireless IBDs to unintentionally cause tissue heating, leading to potential harm to surrounding tissue. The previous literature examined temperature estimations and specific absorption rates (SAR) related to IBDs, mainly within the context of thermal therapy applications. Often, these studies consider system parameters such as frequency, input power, and treatment duration without isolating their individual impacts. This paper provides an extensive literature review, focusing on key antenna design parameters affecting heat distribution in IBDs. These parameters encompass antenna design, treatment settings, testing conditions, and thermal modeling. The research highlights that input power has the most significant impact on localized temperature, with operating frequency ranked as the second most influential factor. While emphasizing the importance of understanding tissue heating and optimizing antennas for improved power transfer, these studies also illuminate existing knowledge gaps. Excessive tissue heat can lead to harmful effects such as vaporization, carbonization, and irreversible tissue changes. To ensure patient safety and reduce expenses linked to clinical trials, employing simulation-driven approaches for IBD antenna design and optimization is essential.
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Affiliation(s)
- Ala Alemaryeen
- Department of Computer Engineering and Communication, Tafila Technical University, Tafila 66110, Jordan
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Tapela K, Opurum PC, Nuokpem FY, Tetteh B, Siaw GK, Humbert MV, Tawiah-Eshun S, Barakisu AI, Asiedu K, Arhin SK, Manu AA, Appiedu-Addo SNA, Obbeng L, Quansah D, Languon S, Anyigba C, Dosoo D, Edu NKO, Oduro-Mensah D, Ampofo W, Tagoe E, Quaye O, Donkor IO, Akorli J, Aniweh Y, Christodoulides M, Mutungi J, Bediako Y, Rayner JC, Awandare GA, McCormick CJ, Quashie PK. Development of an Affordable ELISA Targeting the SARS-CoV-2 Nucleocapsid and Its Application to Samples from the Ongoing COVID-19 Epidemic in Ghana. Mol Diagn Ther 2023; 27:583-592. [PMID: 37462793 PMCID: PMC10435612 DOI: 10.1007/s40291-023-00655-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2023] [Indexed: 08/18/2023]
Abstract
INTRODUCTION The true nature of the population spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in populations is often not fully known as most cases, particularly in Africa, are asymptomatic. Finding the true magnitude of SARS-CoV-2 spread is crucial to provide actionable data about the epidemiological progress of the disease for researchers and policymakers. This study developed and optimized an antibody enzyme-linked immunosorbent assay (ELISA) using recombinant nucleocapsid antigen expressed in-house using a simple bacterial expression system. METHODS Nucleocapsid protein from SARS-CoV-2 was expressed and purified from Escherichia coli. Plasma samples used for the assay development were obtained from Ghanaian SARS-CoV-2 seropositive individuals during the pandemic, while seronegative controls were plasma samples collected from blood donors before the coronavirus disease 2019 (COVID-19) pandemic. Another set of seronegative controls was collected during the COVID-19 pandemic. Antibody detection and levels within the samples were validated using commercial kits and Luminex. Analyses were performed using GraphPad Prism, and the sensitivity, specificity and background cut-off were calculated. RESULTS AND DISCUSSION This low-cost ELISA (£0.96/test) assay has a high prediction of 98.9%, and sensitivity and specificity of 97% and 99%, respectively. The assay was subsequently used to screen plasma from SARS-CoV-2 RT-PCR-positive Ghanaians. The assay showed no significant difference in nucleocapsid antibody levels between symptomatic and asymptomatic, with an increase of the levels over time. This is in line with our previous publication. CONCLUSION This study developed a low-cost and transferable assay that enables highly sensitive and specific detection of human anti-SARS-CoV-2 IgG antibodies. This assay can be modified to include additional antigens and used for continuous monitoring of sero-exposure to SARS-CoV-2 in West Africa.
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Affiliation(s)
- Kesego Tapela
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Precious C Opurum
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Franklin Y Nuokpem
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Becky Tetteh
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Godfred K Siaw
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Maria V Humbert
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Sylvia Tawiah-Eshun
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Anna Ibrahim Barakisu
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Kwame Asiedu
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Samuel Kojo Arhin
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Aaron A Manu
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Sekyibea N A Appiedu-Addo
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Louisa Obbeng
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Darius Quansah
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Sylvester Languon
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Claudia Anyigba
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Daniel Dosoo
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Nelson K O Edu
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Daniel Oduro-Mensah
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - William Ampofo
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Emmanuel Tagoe
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health, College of Health Sciences, University of Ghana, Accra, Ghana
| | - Osbourne Quaye
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Irene Owusu Donkor
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Jewelna Akorli
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Yaw Aniweh
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK
| | - Myron Christodoulides
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Joe Mutungi
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
| | - Yaw Bediako
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK
- Yemaachi Biotech Inc., 222 Swaniker St, Accra, Ghana
| | - Julian C Rayner
- Cambridge Institute for Medical Research, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UK
| | - Gordon A Awandare
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Legon, Accra, Ghana
| | - Christopher J McCormick
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Peter Kojo Quashie
- West African Centre for Cell Biology of Infectious Pathogens, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana.
- The Francis Crick Institute, 1 Midland Rd, London, NW1 1AT, UK.
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10
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Boregowda G, Mariappan P. 3D modeling of vector/edge finite element method for multi-ablation technique for large tumor-computational approach. PLoS One 2023; 18:e0289262. [PMID: 37506084 PMCID: PMC10381062 DOI: 10.1371/journal.pone.0289262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Microwave ablation (MWA) is a cancer thermal ablation treatment that uses electromagnetic waves to generate heat within the tissue. The goal of this treatment is to eliminate tumor cells while leaving healthy cells unharmed. During MWA, excess heat generation can kill healthy cells. Hence, mathematical models and numerical techniques are required to analyze the heat distribution in the tissue before the treatment. The aim of this research is to explain the implementation of the 3D vector finite element method in a wave propagation model that simulates the specific absorption rate in the liver. The 3D Nedelec elements from H(curl; Ω) space are used to discretize the wave propagation model, and this implementation is helpful in solving many real-world problems that involve electromagnetic propagation with perfect conducting and absorbing boundary conditions. One of the difficulties in ablation treatment is creating a large ablation zone for a large tumor (diameter greater than 3 cm) in a short period of time with minimum damage to the surrounding tissue. This article addresses the aforementioned issue by introducing four antennas into the different places of the tumor sequentially and producing heat uniformly over the tumor. The results demonstrated that 95.5% of the tumor cells were killed with minimal damage to the healthy cells when the heating time was increased to 4 minutes at each position. Subsequently, we studied the temperature distribution and localised tissue contraction in the tissue using the three-dimensional bio-heat equation and temperature-time dependent model, respectively. The local tissue contraction is measured at arbitrary points in the domain and is more noticeable at temperatures higher than 102°C. The thermal damage in the liver during MWA treatment is investigated using the three-state cell death model. The system of partial differential equations is solved numerically due to the complex geometry of the domain, and the results are compared with experimental data to validate the models and parameters.
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Affiliation(s)
- Gangadhara Boregowda
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Andhra Pradesh, India
| | - Panchatcharam Mariappan
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Andhra Pradesh, India
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11
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Carconi C, Cerreti M, Roberto M, Arrivi G, D'Ambrosio G, De Felice F, Di Civita MA, Iafrate F, Lucatelli P, Magliocca FM, Picchetto A, Picone V, Catalano C, Cortesi E, Tombolini V, Mazzuca F, Tomao S. The Management of Oligometastatic Disease in Colorectal Cancer: Present Strategies and Future Perspectives. Crit Rev Oncol Hematol 2023; 186:103990. [PMID: 37061075 DOI: 10.1016/j.critrevonc.2023.103990] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 03/29/2023] [Accepted: 04/11/2023] [Indexed: 04/17/2023] Open
Abstract
Oligometastatic disease has been described as an intermediate clinical state between localized cancer and systemically metastasized disease. Recent clinical studies have shown prolonged survival when aggressive locoregional approaches are added to systemic therapies in patients with oligometastases. The aim of this review is to outline the newest options to treat oligometastatic colorectal cancer (CRC), also considering its molecular patterns. We present an overview of the available local treatment strategies, including surgical procedures, stereotactic body radiation therapy (SBRT), thermal ablation, as well as trans-arterial chemoembolization (TACE) and selective internal radiotherapy (SIRT). Moreover, since imaging methods provide crucial information for the early diagnosis and management of oligometastatic CRC, we discuss the role of modern radiologic techniques in selecting patients that are amenable to potentially curative locoregional treatments.
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Affiliation(s)
- Catia Carconi
- Sant'Andrea University Hospital, Faculty of Medicine and Psychology, "Sapienza" University of Rome, Rome, Italy
| | - Micaela Cerreti
- Sant'Andrea University Hospital, Faculty of Medicine and Psychology, "Sapienza" University of Rome, Rome, Italy
| | - Michela Roberto
- UOC Oncologia A, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, 00161 Rome, Italy.
| | - Giulia Arrivi
- Oncology Unit, Sant' Andrea University Hospital, Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Giancarlo D'Ambrosio
- Department of General Surgery, Surgical Specialties and Organ Transplantation, Policlinico Umberto I, "Sapienza" University of Rome, 00161 Rome, Italy
| | - Francesca De Felice
- Department of Radiotherapy, Policlinico Umberto I "Sapienza" University of Rome, Rome, Italy
| | - Mattia Alberto Di Civita
- UOC Oncologia A, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, 00161 Rome, Italy
| | - Franco Iafrate
- Department of Radiological Sciences, Oncology and Pathology, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Pierleone Lucatelli
- Vascular and Interventional radiology Unit, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Fabio Massimo Magliocca
- Vascular and Interventional radiology Unit, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Andrea Picchetto
- Emergency Department, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Vincenzo Picone
- UOC Oncologia B, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Carlo Catalano
- Vascular and Interventional radiology Unit, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Enrico Cortesi
- UOC Oncologia B, Department of radiological, Oncological and Anathomo-patological Science, Policlinico Umberto I, "Sapienza" University of Rome, Rome, Italy
| | - Vincenzo Tombolini
- Department of Radiotherapy, Policlinico Umberto I "Sapienza" University of Rome, Rome, Italy
| | - Federica Mazzuca
- Oncology Unit, Sant' Andrea University Hospital, Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Silverio Tomao
- Oncology Unit, Sant' Andrea University Hospital, Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
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12
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Gangadhara B, Mariappan P. A vector finite element approach to temperature dependent parameters of microwave ablation for liver cancer. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2023; 39:e3661. [PMID: 36385734 DOI: 10.1002/cnm.3661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/23/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Microwave ablation (MWA) is a minimally invasive treatment for cancer that uses electromagnetic waves to kill the tumor cells without significantly damaging the surrounding healthy cells. A three-state cell death model calculates the thermal damage around the Hepatocellular carcinoma (HCC) tumor in the liver tissue. The temperature profile is simulated for a single-slot co-axial antenna with a 1 mm air slot located near the tip of the antenna to produce an adequate amount of heat. The aims of this study are (1) to use the vector/edge finite element method (VFEM) to simulate the electromagnetic wave propagation to obtain the specific absorption rate, which is an input for the bio-heat equation that predicts the heat distribution in the liver tissue during MWA treatment, and (2) to compare the computational costs of VFEM and the finite element method (FEM) when different types of input powers and dielectric properties are used in the wave propagation equation. This study claims that the accuracy level increases marginally with less computation cost while using VFEM for temperature-dependent wave propagation equation.
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Affiliation(s)
- Boregowda Gangadhara
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Chindepalle, Andhra Pradesh, India
| | - Panchatcharam Mariappan
- Department of Mathematics and Statistics, Indian Institute of Technology Tirupati, Chindepalle, Andhra Pradesh, India
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13
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Miaskowski A, Gas P. Numerical Estimation of SAR and Temperature Distributions inside Differently Shaped Female Breast Tumors during Radio-Frequency Ablation. MATERIALS (BASEL, SWITZERLAND) 2022; 16:223. [PMID: 36614561 PMCID: PMC9821952 DOI: 10.3390/ma16010223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Radio-frequency (RF) ablation is a reliable technique for the treatment of deep-seated malignant tumors, including breast carcinoma, using high ablative temperatures. The paper aims at a comparative analysis of the specific absorption rate and temperature distribution during RF ablation with regard to different female breast tumors. In the study, four tumor models equivalent to an irregular tumor were considered, i.e., an equivalent sphere and ellipsoid with the same surfaces and volumes as the irregular tumor and an equivalent sphere and ellipsoid inscribed in the irregular tumor. An RF applicator with a specific voltage, operating at 100 kHz inserted into the anatomically correct female breast, was applied as a source of electromagnetically induced heat. A conjugated Laplace equation with the modified Pennes equation was used to obtain the appropriate temperature gradient in the treated area. The levels of power dissipation in terms of the specific absorption rate (SAR) inside the naturalistically shaped tumor, together with the temperature profiles of the four simplified tumor models equivalent to the irregular one, were determined. It was suggested that the equivalent tumor models might successfully replace a real, irregularly shaped tumor, and the presented numeric methodology may play an important role in the complex therapeutic RF ablation process of irregularly shaped female breast tumors.
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Affiliation(s)
- Arkadiusz Miaskowski
- Department of Applied Mathematics and Computer Sciences, Faculty of Production Engineering, University of Life Sciences in Lublin, Akademicka 13 Street, 20-950 Lublin, Poland
| | - Piotr Gas
- Department of Electrical and Power Engineering, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, Mickiewicza 30 Avenue, 30-059 Krakow, Poland
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14
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Bottiglieri A, Brace C, O’Halloran M, Farina L. MWA Performed at 5.8 GHz through 'Side Firing' Approach: An Exploratory Study. SENSORS (BASEL, SWITZERLAND) 2022; 22:9320. [PMID: 36502019 PMCID: PMC9735527 DOI: 10.3390/s22239320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Recent studies have shown that ablation techniques have the potential to eradicate adrenal adenomas while preserving the functionalities of the adrenal gland and the surrounding anatomical structures. This study explores a new microwave ablation (MWA) approach operating at 5.8 GHz and using anatomical and dielectric characteristics of the target tissue to create directional heating patterns. Numerical simulations are executed in planar and 3D adrenal models, considering two energy doses. The numerical study is refined accounting for the vaporization of the tissue water content. Ex vivo experimental evaluations on porcine adrenal models complete the study. The numerical and experimental results show that spherical ablation zones are able to cover the target for both energy doses considered. Nonetheless, most of the non-targeted tissues can be preserved from excessive heating when low energy level is used. Numerical models accounting for water vaporization are capable to foresee the experimental temperature values. This study shows that the proposed MWA directional approach operating at 5.8 GHz can be considered for creating effective and selective ablation zones.
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Affiliation(s)
- Anna Bottiglieri
- Electrical and Electronic Engineering, National University of Ireland Galway, H91 TK33 Galway, Ireland
- Translational Medical Device Lab, National University of Ireland Galway, H91 TK33 Galway, Ireland
| | - Christopher Brace
- Department of Biomedical Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, WI 53706, USA
- Department of Radiology, University of Wisconsin-Madison, 1111 Highland Ave, Madison, WI 53705, USA
| | - Martin O’Halloran
- Translational Medical Device Lab, National University of Ireland Galway, H91 TK33 Galway, Ireland
| | - Laura Farina
- Translational Medical Device Lab, National University of Ireland Galway, H91 TK33 Galway, Ireland
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15
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Bottiglieri A, O'Halloran M, Ruvio G, Farina L. Management of adreno-cortical adenomas using microwave ablation: study of the effects of the fat tissue. Int J Hyperthermia 2022; 39:1179-1194. [PMID: 36096484 DOI: 10.1080/02656736.2022.2114611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Adrenocortical neoplasms are the main causes of secondary hypertension and related comorbidities including hypokalemia and cardiovascular diseases. Conventional techniques for the management of this condition are often invasive and not resolutive. Recent studies proposed microwave thermal ablation (MWA) to eradicate adrenocortical adenomas arising in proximity to sensitive structures. This study explores a new MWA approach to selectively direct the electromagnetic energy into the target and shield the surrounding tissues. The new solution relies on the anatomical and dielectric characteristics of the adrenal gland and the surrounding fat capsule. METHODS A 3 D model of the adrenal gland is developed, and a cooled microwave applicator is placed parallel to the interface between the fat and adrenal tissue. Numerical simulations are conducted at 2.45 GHz accounting for two energy delivery settings, two orientations of the applicator and blood perfusion of the tissues. Ex vivo and in vivo ablation procedures are conducted on ovine adrenal glands. Histology analysis completes the experimental studies. RESULTS Numerical results show asymmetric ablation profiles in ex vivo and in vivo conditions. The asymmetry ratio is influenced by the procedure settings and orientation of the applicator. Ablation zones obtained experimentally agree with those predicted by the numerical simulations. Histology analysis confirms irreversible cellular changes only in the adrenal tissue close to the applicator. CONCLUSIONS The outcomes show that the dielectric contrast between the fat layer and tissue target can be a tool in MWA to shape ablation zones to protect the surrounding structures from excessive temperature increases.
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Affiliation(s)
- Anna Bottiglieri
- Electrical and Electronic Engineering, National University of Ireland Galway, Galway, Ireland.,Translational Medical Device Lab, National University of Ireland Galway, Galway, Ireland
| | - Martin O'Halloran
- Translational Medical Device Lab, National University of Ireland Galway, Galway, Ireland
| | | | - Laura Farina
- Translational Medical Device Lab, National University of Ireland Galway, Galway, Ireland.,Endowave Ltd, Galway, Ireland
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16
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Radmilović-Radjenović M, Bošković N, Sabo M, Radjenović B. An Analysis of Microwave Ablation Parameters for Treatment of Liver Tumors from the 3D-IRCADb-01 Database. Biomedicines 2022; 10:biomedicines10071569. [PMID: 35884874 PMCID: PMC9312906 DOI: 10.3390/biomedicines10071569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 11/28/2022] Open
Abstract
Simulation techniques are powerful tools for determining the optimal conditions necessary for microwave ablation to be efficient and safe for treating liver tumors. Owing to the complexity and computational resource consumption, most of the existing numerical models are two-dimensional axisymmetric models that emulate actual three-dimensional cancers and the surrounding tissue, which is often far from reality. Different tumor shapes and sizes require different input powers and ablation times to ensure the preservation of healthy tissues that can be determined only by the full three-dimensional simulations. This study aimed to tailor microwave ablation therapeutic conditions for complete tumor ablation with an adequate safety margin, while avoiding injury to the surrounding healthy tissue. Three-dimensional simulations were performed for a multi-slot microwave antenna immersed in two tumors obtained from the 3D-IRCADb-01 liver tumors database. The temperature dependence of the dielectric and thermal properties of healthy and tumoral liver tissues, blood perfusion, and water content are crucial for calculating the correct ablation time and, thereby, the correct ablation process. The developed three-dimensional simulation model may help practitioners in planning patient-individual procedures by determining the optimal input power and duration of the ablation process for the actual shape of the tumor. With proper input power, necrotic tissue is placed mainly in the tumor, and only a small amount of surrounding tissue is damaged.
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Affiliation(s)
- Marija Radmilović-Radjenović
- Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia; (N.B.); (B.R.)
- Correspondence:
| | - Nikola Bošković
- Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia; (N.B.); (B.R.)
| | - Martin Sabo
- Faculty of Informatics and Information Technologies, Slovak University of Technology in Bratislava, Ilkovicova 2, 84216 Bratislava, Slovakia;
| | - Branislav Radjenović
- Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia; (N.B.); (B.R.)
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17
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Kashkooli FM, Rezaeian M, Soltani M. Drug delivery through nanoparticles in solid tumors: a mechanistic understanding. Nanomedicine (Lond) 2022; 17:695-716. [PMID: 35451315 DOI: 10.2217/nnm-2021-0126] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: In this study, the main goal was to apply a multi-scale computational model in evaluating nano-sized drug-delivery systems, following extracellular drug release, into solid tumors in order to predict treatment efficacy. Methods: The impact of several parameters related to tumor (size, shape, vessel-wall pore size, and necrotic core size) and therapeutic agents (size of nanoparticles, binding affinity of drug, drug release rate from nanoparticles) are examined in detail. Results: This study illustrates that achieving a higher treatment efficacy requires smaller nanoparticles (NPs) or a low binding affinity and drug release rate. Long-term analysis finds that a slow release rate in extracellular space does not always improve treatment efficacy compared with a rapid release rate; NP size as well as binding affinity of drug are also highly influential. Conclusions: The presented methodology can be used as a step forward towards optimization of patient-specific nanomedicine plans.
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Affiliation(s)
| | - Mohsen Rezaeian
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - M Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran.,Department of Electrical & Computer Engineering, University of Waterloo, Waterloo, Canada.,Centre for Biotechnology & Bioengineering (CBB), University of Waterloo, Waterloo, Canada.,Advanced Bioengineering Initiative Center, Computational Medicine Center, K. N. Toosi University of Technology, Tehran, Iran
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18
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Tehrani MHH, Soltani M, Moradi Kashkooli F, Mahmoudi M, Raahemifar K. Computational Modeling of Combination of Magnetic Hyperthermia and Temperature-Sensitive Liposome for Controlled Drug Release in Solid Tumor. Pharmaceutics 2021; 14:35. [PMID: 35056931 PMCID: PMC8778939 DOI: 10.3390/pharmaceutics14010035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/14/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
Combination therapy, a treatment modality that combines two or more therapeutic methods, provides a novel pathway for cancer treatment, as it targets the region of interest (ROI) in a characteristically synergistic or additive manner. To date, liposomes are the only nano-drug delivery platforms that have been used in clinical trials. Here, we speculated that it could be promising to improve treatment efficacy and reduce side effects by intravenous administration of thermo-sensitive liposomes loaded with doxorubicin (TSL-Dox) during magnetic hyperthermia (MHT). A multi-scale computational model using the finite element method was developed to simulate both MHT and temperature-sensitive liposome (TSL) delivery to a solid tumor to obtain spatial drug concentration maps and temperature profiles. The results showed that the killing rate of MHT alone was about 15%, which increased to 50% using the suggested combination therapy. The results also revealed that this combination treatment increased the fraction of killed cells (FKCs) inside the tumor compared to conventional chemotherapy by 15% in addition to reducing side effects. Furthermore, the impacts of vessel wall pore size, the time interval between TSL delivery and MHT, and the initial dose of TSLs were also investigated. A considerable reduction in drug accumulation was observed in the tumor by decreasing the vessel wall pore size of the tumor. The results also revealed that the treatment procedure plays an essential role in the therapeutic potential of anti-cancer drugs. The results suggest that the administration of MHT can be beneficial in the TSL delivery system and that it can be employed as a guideline for upcoming preclinical studies.
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Affiliation(s)
- Masoud H. H. Tehrani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran 19967-15433, Iran; (M.H.H.T.); (F.M.K.)
| | - M. Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran 19967-15433, Iran; (M.H.H.T.); (F.M.K.)
- Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
- Centre for Biotechnology and Bioengineering (CBB), University of Waterloo, Waterloo, ON N2L 3G1, Canada
- Advanced Bioengineering Initiative Center, Multidisciplinary International Complex, K. N. Toosi University of Technology, Tehran 14176-14411, Iran
| | - Farshad Moradi Kashkooli
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran 19967-15433, Iran; (M.H.H.T.); (F.M.K.)
| | - Mohammadreza Mahmoudi
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA;
| | - Kaamran Raahemifar
- Data Science and Artificial Intelligence Program, College of Information Sciences and Technology (IST), Penn State University, State College, Pennsylvania, PA 16801, USA;
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
- School of Optometry and Vision Science, Faculty of Science, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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19
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On Efficacy of Microwave Ablation in the Thermal Treatment of an Early-Stage Hepatocellular Carcinoma. Cancers (Basel) 2021; 13:cancers13225784. [PMID: 34830937 PMCID: PMC8616542 DOI: 10.3390/cancers13225784] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/08/2021] [Accepted: 11/16/2021] [Indexed: 02/08/2023] Open
Abstract
Microwave ablation at 2.45 GHz is gaining popularity as an alternative therapy to hepatic resection with a higher overall survival rate than external beam radiation therapy and proton beam therapy. It also offers better long-term recurrence-free overall survival when compared with radiofrequency ablation. To improve the design and optimization of microwave ablation procedures, numerical models can provide crucial information. A three-dimensional model of the antenna and targeted tissue without homogeneity assumptions are the most realistic representation of the physical problem. Due to complexity and computational resources consumption, most of the existing numerical studies are based on using two-dimensional axisymmetric models to emulate actual three-dimensional cancers and surrounding tissue, which is often far from reality. The main goal of this study is to develop a fully three-dimensional model of a multislot microwave antenna immersed into liver tissue affected by early-stage hepatocellular carcinoma. The geometry of the tumor is taken from the 3D-IRCADb-01 liver tumors database. Simulations were performed involving the temperature dependence of the blood perfusion, dielectric and thermal properties of both healthy and tumoral liver tissues. The water content changes during the ablation process are also included. The optimal values of the input power and the ablation time are determined to ensure complete treatment of the tumor with minimal damage to the healthy tissue. It was found that a multislot antenna is designed to create predictable, large, spherical zones of the ablation that are not influenced by varying tissue environments. The obtained results may be useful for determining optimal conditions necessary for microwave ablation to be as effective as possible for treating early-stage hepatocellular carcinoma, with minimized invasiveness and collateral damages.
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20
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A Computational Study on Magnetic Nanoparticles Hyperthermia of Ellipsoidal Tumors. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11209526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The modelling of magnetic hyperthermia using nanoparticles of ellipsoid tumor shapes has not been studied adequately. To fill this gap, a computational study has been carried out to determine two key treatment parameters: the therapeutic temperature distribution and the extent of thermal damage. Prolate and oblate spheroidal tumors, of various aspect ratios, surrounded by a large healthy tissue region are assumed. Tissue temperatures are determined from the solution of Pennes’ bio-heat transfer equation. The mortality of the tissues is determined by the Arrhenius kinetic model. The computational model is successfully verified against a closed-form solution for a perfectly spherical tumor. The therapeutic temperature and the thermal damage in the tumor center decrease as the aspect ratio increases and it is insensitive to whether tumors of the same aspect ratio are oblate or prolate spheroids. The necrotic tumor area is affected by the tumor prolateness and oblateness. Good comparison is obtained of the present model with three sets of experimental measurements taken from the literature, for animal tumors exhibiting ellipsoid-like geometry. The computational model enables the determination of the therapeutic temperature and tissue thermal damage for magnetic hyperthermia of ellipsoidal tumors. It can be easily reproduced for various treatment scenarios and may be useful for an effective treatment planning of ellipsoidal tumor geometries.
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Pal UM, Vishnu Gk A, Varma M, Vaidya JS, Pandya HJ. Thermo-optic measurements and their inter-dependencies for delineating cancerous breast biopsy tissue from adjacent normal. JOURNAL OF BIOPHOTONICS 2021; 14:e202100041. [PMID: 34042303 DOI: 10.1002/jbio.202100041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/17/2021] [Accepted: 05/25/2021] [Indexed: 06/12/2023]
Abstract
The histopathological diagnosis of cancer is the current gold standard to differentiate normal from cancerous tissues. We propose a portable platform prototype to characterize the tissue's thermal and optical properties, and their inter-dependencies to potentially aid the pathologist in making an informed decision. The measurements were performed on 10 samples from five subjects, where the cancerous and adjacent normal were extracted from the same patient. It was observed that thermal conductivity (k) and reduced-scattering-coefficient (μ's ) for both the cancerous and normal tissues reduced with the rise in tissue temperature. Comparing cancerous and adjacent normal tissue, the difference in k and μ's (at 940 nm) were statistically significant (p = 7.94e-3), while combining k and μ's achieved the highest statistical significance (6.74e-4). These preliminary results promise and support testing on a large number of samples for rapidly differentiating cancerous from adjacent normal tissues.
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Affiliation(s)
- Uttam M Pal
- Department of Electronic Systems Engineering, The Indian Institute of Science, Bengaluru, India
| | - Anil Vishnu Gk
- Department of Electronic Systems Engineering, The Indian Institute of Science, Bengaluru, India
- Center for BioSystems Science and Engineering, The Indian Institute of Science, Bengaluru, India
| | - Manoj Varma
- Centre for Nano Science and Engineering, The Indian Institute of Science, Bengaluru, India
| | - Jayant S Vaidya
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Hardik J Pandya
- Department of Electronic Systems Engineering, The Indian Institute of Science, Bengaluru, India
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Moradi Kashkooli F, Soltani M, Momeni MM. Computational modeling of drug delivery to solid tumors: A pilot study based on a real image. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gartshore A, Kidd M, Joshi LT. Applications of Microwave Energy in Medicine. BIOSENSORS 2021; 11:96. [PMID: 33810335 PMCID: PMC8065940 DOI: 10.3390/bios11040096] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/17/2021] [Accepted: 03/22/2021] [Indexed: 05/17/2023]
Abstract
Microwaves are a highly utilized electromagnetic wave, used across a range of industries including food processing, communications, in the development of novel medical treatments and biosensor diagnostics. Microwaves have known thermal interactions and theorized non-thermal interactions with living matter; however, there is significant debate as to the mechanisms of action behind these interactions and the potential benefits and limitations of their use. This review summarizes the current knowledge surrounding the implementation of microwave technologies within the medical industry.
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Affiliation(s)
| | - Matt Kidd
- Emblation Microwave Ltd., Alloa, Scotland FK10 2HU, UK;
| | - Lovleen Tina Joshi
- School of Biomedical Science, University of Plymouth, Plymouth PL4 8AA, UK;
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Huang H, Zhang L, Moser MAJ, Zhang W, Zhang B. A review of antenna designs for percutaneous microwave ablation. Phys Med 2021; 84:254-264. [PMID: 33773908 DOI: 10.1016/j.ejmp.2021.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 03/03/2021] [Accepted: 03/06/2021] [Indexed: 12/15/2022] Open
Abstract
Microwave (MW) antenna is a key element in microwave ablation (MWA) treatments as the means that energy is delivered in a focused manner to the tumor and its surrounding area. The energy delivered results in a rise in temperature to a lethal level, resulting in cell death in the ablation zone. The delivery of energy and hence the success of MWA is closely dependent on the structure of the antennas. Therefore, three design criteria, such as expected ablation zone pattern, efficiency of energy delivery, and minimization of the diameter of the antennas have been the focus along the evolution of the MW antenna. To further improve the performance of MWA in the treatment of various tumors through inventing novel antennas, this article reviews the state-of-the-art and summarizes the development of MW antenna designs regarding the three design criteria.
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Affiliation(s)
- Hangming Huang
- Energy-based Tumor Ablation Laboratory, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
| | - Lifeng Zhang
- Department of General Surgery, the First Affiliated Hospital of Soochow University,Soochow University, Jiangsu, China
| | - Michael A J Moser
- Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, Canada
| | - Wenjun Zhang
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Bing Zhang
- Energy-based Tumor Ablation Laboratory, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China.
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Moradi Kashkooli F, Soltani M, Rezaeian M, Meaney C, Hamedi MH, Kohandel M. Effect of vascular normalization on drug delivery to different stages of tumor progression: In-silico analysis. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Rahpeima R, Soltani M, Moradi Kashkooli F. Numerical study of microwave induced thermoacoustic imaging for initial detection of cancer of breast on anatomically realistic breast phantom. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 196:105606. [PMID: 32585474 DOI: 10.1016/j.cmpb.2020.105606] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVE Microwave-induced thermoacoustic imaging (MITAI) represents an innovative imaging approach for detection of breast cancer at initial phases by integrating the benefits provided by procedures of microwave and ultrasound imaging. The present investigation examines an innovative three-dimensional numerical modeling of MITAI as a problem with multi-physics nature. METHODS Simulations are performed by the use of COMSOL software. An anatomically realistic breast phantom representing various parts of a real breast, such as three different types of tissue, fibro-connective/glandular, transitional; and fatty, is taken into consideration along with a tumor. This breast phantom with a tumor is irradiated by a 2.45 GHz pulsed rectangular waveguide. The temperature increase and its consequent pressure caused by electromagnetic absorption are analyzed. RESULTS More temperature increase occurs in the tumor area than in the other parts of the breast, the fact which results in further increase in the pressure in the tumor area than other parts. This makes the tumor distinguishable. The ability of the MITAI process regarding the tumor size, shape (both geometrical shape and spatial orientation), location, the irradiation power level, and the pulse width is also investigated. It is demonstrated that tumor size does not have a significant impact on the efficiency of detection. In fact, very small tumors in the early stages of cancer development (with a radius of 0.25 cm) are also detectable by employing the MITAI technique. The geometrical shape of the tumor does not considerably affect the detecting performance just by itself. The spatial orientation of the tumor actually has a great impact on it. The location of the tumor is an essential factor involved in detection efficiency of MITAI. Tumors located in the fatty tissues would be much easier to be detected than those in the glandular tissues. Moreover, results denote that with augmentation of the irradiation power level or increasing the pulse width, stronger acoustic waves would be produced to make tumor detection easier. CONCLUSION These modeling and techniques may be applied aiming for determination of the amount of the generated pressure differences and acoustic pressure magnitude, and can be utilized as an effective prognosticator in practical tests.
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Affiliation(s)
- Reza Rahpeima
- Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - M Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran; Advanced Bioengineering Initiative Center, Computational Medicine Center, K. N. Toosi University of Technology, Tehran, Iran; Cancer Biology Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran; Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada; Centre for Biotechnology and Bioengineering (CBB), University of Waterloo, Waterloo, Ontario, Canada.
| | - Farshad Moradi Kashkooli
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran; Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada
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