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Noghabaei G, Ahmadzadeh A, Pouran F, Mahdavian A, Rezaei M, Razzaghi M, Mansouri V, Maleki F. The Role of Laser and Microwave in Treatment of Endocrine Disorders: A Systematic Review. J Lasers Med Sci 2024; 15:e23. [PMID: 39188933 PMCID: PMC11345803 DOI: 10.34172/jlms.2024.23] [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: 02/10/2024] [Accepted: 04/21/2024] [Indexed: 08/28/2024]
Abstract
Introduction: The treatment of endocrine problems like thyroid disease, diabetes mellitus (DM), and polycystic ovary syndrome (PCOS) faces significant challenges so that medical professionals worldwide try to find a new therapeutic approach. However, along with common treatments which include medications, hormone replacement therapy, and surgery; there is a growing interest in alternative therapies like laser therapy, which offers a non-invasive and unique technique for treating endocrine disorders alone or in combination with traditional methods. The main goal of this review was to do a systematic review on the role of the laser and Microwave in the treatment endocrine disorders. Methods: In the present systematic review, the most important databases, including PubMed, Scopus and Google Scholar, were searched for the studies examining the effect of lasers on the treatment of endocrine problems by using appropriate keywords and specific strategies from 1995 to 2023. All the studies that were not about lasers and endocrine were excluded. Results: Based on 51 reviewed studies, lasers and radiofrequency ablation such as RFA are effective in the treatment of thyroid diseases, hyperparathyroidism, pancreatic disorders, and sexual dysfunctions. Laser-induced interstitial thermal therapy (LITT) and microwave ablation (MWA) are genuine minimally invasive methods for the treatment of benign nodules, adenomas, and tumor ablation including pancreatic carcinomas and adrenal tumors. Intravenous laser blood irradiation (ILBI) which uses red, UV, and blue light could be effective in treating various metabolic disorders, such as DM. Conclusion: Laser as a cutting-edge and minimally invasive approach could treat various endocrine disorders. It has a great potential to treat and regulate hormonal imbalances, decrease inflammation, and relieve symptoms of various ailments, such as endocrine disorders.
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Affiliation(s)
- Giti Noghabaei
- Department of Internal Medicine, Imam Hossein Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Alireza Ahmadzadeh
- Department of Laboratory Sciences, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Pouran
- Medical Laboratory Sciences, Students Research Committee, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirmohsen Mahdavian
- Medical Laboratory Sciences, Students Research Committee, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mitra Rezaei
- Genomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Razzaghi
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Vahid Mansouri
- Proteomics Research Center, Faculty of Paramedical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farajolah Maleki
- Clinical Research Development Unit, Shahid Mostafa Khomeini Hospital, Ilam University of Medical Sciences, Ilam, Iran
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Singh S, Bianchi L, Korganbayev S, Namakshenas P, Melnik R, Saccomandi P. Non-Fourier Bioheat Transfer Analysis in Brain Tissue During Interstitial Laser Ablation: Analysis of Multiple Influential Factors. Ann Biomed Eng 2024; 52:967-981. [PMID: 38236341 PMCID: PMC11252202 DOI: 10.1007/s10439-023-03433-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 12/22/2023] [Indexed: 01/19/2024]
Abstract
This work presents the dual-phase lag-based non-Fourier bioheat transfer model of brain tissue subjected to interstitial laser ablation. The finite element method has been utilized to predict the brain tissue's temperature distributions and ablation volumes. A sensitivity analysis has been conducted to quantify the effect of variations in the input laser power, treatment time, laser fiber diameter, laser wavelength, and non-Fourier phase lags. Notably, in this work, the temperature-dependent thermal properties of brain tissue have been considered. The developed model has been validated by comparing the temperature obtained from the numerical and ex vivo brain tissue during interstitial laser ablation. The ex vivo brain model has been further extended to in vivo settings by incorporating the blood perfusion effects. The results of the systematic analysis highlight the importance of considering temperature-dependent thermal properties of the brain tissue, non-Fourier behavior, and microvascular perfusion effects in the computational models for accurate predictions of the treatment outcomes during interstitial laser ablation, thereby minimizing the damage to surrounding healthy tissue. The developed model and parametric analysis reported in this study would assist in a more accurate and precise prediction of the temperature distribution, thus allowing to optimize the thermal dosage during laser therapy in the brain.
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Affiliation(s)
- Sundeep Singh
- Faculty of Sustainable Design Engineering, University of Prince Edward Island, Charlottetown, PE, C1A 4P3, Canada
| | - Leonardo Bianchi
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy
| | - Sanzhar Korganbayev
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy
| | - Pouya Namakshenas
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy
| | - Roderick Melnik
- MS2Discovery Interdisciplinary Research Institute, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy.
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Gomez Bustamante T, Mercado Montoya M, Berjano E, González-Suárez A, Kulstad E. Proactive esophageal cooling during laser cardiac ablation: A computer modeling study. Lasers Surg Med 2024; 56:392-403. [PMID: 38436122 DOI: 10.1002/lsm.23774] [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: 08/28/2023] [Revised: 02/09/2024] [Accepted: 02/17/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND AND OBJECTIVES Laser ablation is increasingly used to treat atrial fibrillation (AF). However, atrioesophageal injury remains a potentially serious complication. While proactive esophageal cooling (PEC) reduces esophageal injury during radiofrequency ablation, the effects of PEC during laser ablation have not previously been determined. We aimed to evaluate the protective effects of PEC during laser ablation of AF by means of a theoretical study based on computer modeling. METHODS Three-dimensional mathematical models were built for 20 different cases including a fragment of atrial wall (myocardium), epicardial fat (adipose tissue), connective tissue, and esophageal wall. The esophagus was considered with and without PEC. Laser-tissue interaction was modeled using Beer-Lambert's law, Pennes' Bioheat equation was used to compute the resultant heating, and the Arrhenius equation was used to estimate the fraction of tissue damage (FOD), assuming a threshold of 63% to assess induced necrosis. We modeled laser irradiation power of 8.5 W over 20 s. Thermal simulations extended up to 250 s to account for thermal latency. RESULTS PEC significantly altered the temperature distribution around the cooling device, resulting in lower temperatures (around 22°C less in the esophagus and 9°C in the atrial wall) compared to the case without PEC. This thermal reduction translated into the absence of transmural lesions in the esophagus. The esophagus was thermally damaged only in the cases without PEC and with a distance equal to or shorter than 3.5 mm between the esophagus and endocardium (inner boundary of the atrial wall). Furthermore, PEC demonstrated minimal impact on the lesion created across the atrial wall, either in terms of maximum temperature or FOD. CONCLUSIONS PEC reduces the potential for esophageal injury without degrading the intended cardiac lesions for a variety of different tissue thicknesses. Thermal latency may influence lesion formation during laser ablation and may play a part in any collateral damage.
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Affiliation(s)
| | | | - Enrique Berjano
- Department of Electronic Engineering, BioMIT, Universitat Politècnica de València, Spain
| | - Ana González-Suárez
- Translational Medical Device Lab, School of Medicine, Lambe Institute for Translational Research, University of Galway, Ireland
- Valencian International University, Valencia, Spain
| | - Erik Kulstad
- University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Santucci F, Nobili M, De Tommasi F, Lo Presti D, Massaroni C, Schena E, Oliva G. Optimizing Sensor Placement for Temperature Mapping during Ablation Procedures. SENSORS (BASEL, SWITZERLAND) 2024; 24:623. [PMID: 38257715 PMCID: PMC10821005 DOI: 10.3390/s24020623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/09/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
Accurately mapping the temperature during ablation is crucial for improving clinical outcomes. While various sensor configurations have been suggested in the literature, depending on the sensors' type, number, and size, a comprehensive understanding of optimizing these parameters for precise temperature reconstruction is still lacking. This study addresses this gap by introducing a tool based on a theoretical model to optimize the placement of fiber Bragg grating sensors (FBG) within the organ undergoing ablation. The theoretical model serves as a general framework, allowing for adaptation to various situations. In practical application, the model provides a foundational structure, with the flexibility to tailor specific optimal solutions by adjusting problem-specific data. We propose a nonlinear and nonconvex (and, thus, only solvable in an approximated manner) optimization formulation to determine the optimal distribution and three-dimensional placement of FBG arrays. The optimization aims to find a trade-off among two objectives: maximizing the variance of the expected temperatures measured by the sensors, which can be obtained from a predictive simulation that considers both the type of applicator used and the specific organ involved, and maximizing the squared sum of the distances between the sensor pairs. The proposed approach provides a trade-off between collecting diverse temperatures and not having all the sensors concentrated in a single area. We address the optimization problem through the utilization of approximation schemes in programming. We then substantiate the efficacy of this approach through simulations. This study tackles optimizing the FBGs' sensor placement for precise temperature monitoring during tumor ablation. Optimizing the FBG placement enhances temperature mapping, aiding in tumor cell eradication while minimizing damage to surrounding tissues.
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Affiliation(s)
- Francesca Santucci
- Unit of Automatic Control, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.S.); (M.N.)
| | - Martina Nobili
- Unit of Automatic Control, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.S.); (M.N.)
| | - Francesca De Tommasi
- Unit of Measurements and Biomedical Instrumentation, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.D.T.); (D.L.P.)
| | - Daniela Lo Presti
- Unit of Measurements and Biomedical Instrumentation, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.D.T.); (D.L.P.)
- Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200, 00128 Rome, Italy
| | - Carlo Massaroni
- Unit of Measurements and Biomedical Instrumentation, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.D.T.); (D.L.P.)
- Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200, 00128 Rome, Italy
| | - Emiliano Schena
- Unit of Measurements and Biomedical Instrumentation, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.D.T.); (D.L.P.)
- Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200, 00128 Rome, Italy
| | - Gabriele Oliva
- Unit of Automatic Control, Universitá Campus Bio-Medico di Roma, 00128 Rome, Italy; (F.S.); (M.N.)
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Fan Y, Xu L, Liu S, Li J, Xia J, Qin X, Li Y, Gao T, Tang X. The State-of-the-Art and Perspectives of Laser Ablation for Tumor Treatment. CYBORG AND BIONIC SYSTEMS 2024; 5:0062. [PMID: 38188984 PMCID: PMC10769065 DOI: 10.34133/cbsystems.0062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/21/2023] [Indexed: 01/09/2024] Open
Abstract
Tumors significantly impact individuals' physical well-being and quality of life. With the ongoing advancements in optical technology, information technology, robotic technology, etc., laser technology is being increasingly utilized in the field of tumor treatment, and laser ablation (LA) of tumors remains a prominent area of research interest. This paper presents an overview of the recent progress in tumor LA therapy, with a focus on the mechanisms and biological effects of LA, commonly used ablation lasers, image-guided LA, and robotic-assisted LA. Further insights and future prospects are discussed in relation to these aspects, and the paper proposed potential future directions for the development of tumor LA techniques.
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Affiliation(s)
- Yingwei Fan
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Liancheng Xu
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Shuai Liu
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Jinhua Li
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Jialu Xia
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xingping Qin
- John B. Little Center for Radiation Sciences, Harvard TH Chan School of Public Health, Boston, MA 02115, USA
| | - Yafeng Li
- China Electronics Harvest Technology Co. Ltd., China
| | - Tianxin Gao
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
| | - Xiaoying Tang
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China
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Namakshenas P, Di Matteo FM, Bianchi L, Faiella E, Stigliano S, Quero G, Saccomandi P. Optimization of laser dosimetry based on patient-specific anatomical models for the ablation of pancreatic ductal adenocarcinoma tumor. Sci Rep 2023; 13:11053. [PMID: 37422486 PMCID: PMC10329695 DOI: 10.1038/s41598-023-37859-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 06/28/2023] [Indexed: 07/10/2023] Open
Abstract
Laser-induced thermotherapy has shown promising potential for the treatment of unresectable primary pancreatic ductal adenocarcinoma tumors. Nevertheless, heterogeneous tumor environment and complex thermal interaction phenomena that are established under hyperthermic conditions can lead to under/over estimation of laser thermotherapy efficacy. Using numerical modeling, this paper presents an optimized laser setting for Nd:YAG laser delivered by a bare optical fiber (300 µm in diameter) at 1064 nm working in continuous mode within a power range of 2-10 W. For the thermal analysis, patient-specific 3D models were used, consisting of tumors in different portions of the pancreas. The optimized laser power and time for ablating the tumor completely and producing thermal toxic effects on the possible residual tumor cells beyond the tumor margins were found to be 5 W for 550 s, 7 W for 550 s, and 8 W for 550 s for the pancreatic tail, body, and head tumors, respectively. Based on the results, during the laser irradiation at the optimized doses, thermal injury was not evident either in the 15 mm lateral distances from the optical fiber or in the nearby healthy organs. The present computational-based predictions are also in line with the previous ex vivo and in vivo studies, hence, they can assist in the estimation of the therapeutic outcome of laser ablation for pancreatic neoplasms prior to clinical trials.
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Affiliation(s)
- Pouya Namakshenas
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy
| | | | - Leonardo Bianchi
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy
| | - Eliodoro Faiella
- Radiology Unit, Fondazione Policlinico Universitario Campus Biomedico, Rome, Italy
| | - Serena Stigliano
- Operative Endoscopy Department, Fondazione Policlinico Universitario Campus Biomedico, Rome, Italy
| | - Giuseppe Quero
- Pancreatic Surgery Unit, Gemelli Pancreatic Advanced Research Center (CRMPG), Fondazione Policlinico Universitario Agostino Gemelli IRCCS di Roma, Rome, Italy
- Università Cattolica del Sacro Cuore di Roma, 00168, Rome, Italy
| | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano, 20156, Milan, Italy.
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Korganbayev S, De Landro M, Bianchi L, Verde J, Saccomandi P. Preliminary Results of Laser Ablation during In Vivo Experiments: Comparison of Thermal Effects Obtained with Bare and Diffuser Tip Applicators. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083042 DOI: 10.1109/embc40787.2023.10340179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
This work is a step towards the analysis of the effect of different laser applicator tips used for laser ablation of liver for in vivo experiments. As the thermal outcome of this minimally invasive treatment for tumors depends upon the interaction between the tissue and the light, the emission pattern of the laser applicator has a key role in the shape and size of the final treated region. Hence, we have compared two different laser applicators: a bare tip fiber (emitting light from the tip and forward) and a diffuser tip fiber (emitting light at 360° circumferentially from the side of the fiber). The experiments have been carried out percutaneously in a preclinical scenario (anesthetized pigs), under computed tomography (CT) guidance. The thermal effects of the two applicators have been assessed in terms of real-time temperature distribution, by means of an array of 40 fiber Bragg grating (FBG) sensors, and in terms of cavitation and ablation volumes, measured through CT post-temperature due to breathing motion has been analyzed and filtered out. Results show that the maximum temperature reached 50.5 °C for the bare tip fiber experiment (measured at 6.24 mm distance from the applicator) and 60.9 °C for the diffuser tip fiber experiment (measured at 5.23 mm distance from the applicator). The diffuser tip fiber allowed to achieve a more symmetrical heat distribution than the bare tip fiber, and without cavitation volume.Clinical Relevance-This work shows the analysis of the thermal effects of different laser fiber tips to improve laser ablation treatment. The results obtained in the preclinical scenario well represent the expected clinical outcome in the treatment of hepatic tumors. Moreover, these findings can be applied to other fields in which laser ablation is the optimal therapeutic choice, such as neurosurgery.
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Zubair M, Adams MS, Diederich CJ. An endoluminal cylindrical sectored-ring ultrasound phased-array applicator for minimally-invasive therapeutic ultrasound. Med Phys 2023; 50:1-19. [PMID: 36413363 PMCID: PMC9870260 DOI: 10.1002/mp.16113] [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: 07/07/2022] [Revised: 11/10/2022] [Accepted: 11/10/2022] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND The size of catheter-based ultrasound devices for delivering ultrasound energy to deep-seated tumors is constrained by the access pathway which limits their therapeutic capabilities. PURPOSE To devise and investigate a deployable applicator suitable for minimally-invasive delivery of therapeutic ultrasound, consisting of a 2D cylindrical sectored-ring ultrasound phased array, integrated within an expandable paraboloid-shaped balloon-based reflector. The balloon can be collapsed for compact delivery and expanded close to the target position to mimic a larger-diameter concentric-ring sector-vortex array for enhanced dynamic control of focal depth and volume. METHODS Acoustic and biothermal simulations were employed in 3D generalized homogeneous and patient-specific heterogeneous models, for three-phased array transducers with 32, 64, and 128 elements, composed of sectored 4, 8, and 16 tubular ring transducers, respectively. The applicator performance was characterized as a function of array configuration, focal depth, phasing modes, and balloon reflector geometry. A 16-element proof-of-concept phased array applicator assembly, consisting of four tubular transducers each divided into four sectors, was fabricated, and characterized with hydrophone measurements along and across the axis, and ablations in ex vivo tissue. RESULTS Simulation results indicated that transducer arrays (1.5 MHz, 9 mm OD × 20 mm long), balloon sizes (41-50 mm expanded diameter, 20-60 mm focal depth), phasing mode (0-4) and sonication duration (30 s) can produce spatially localized acoustic intensity focal patterns (focal length: 3-22 mm, focal width: 0.7-8.7 mm) and ablative thermal lesions (width: 2.7-16 mm, length: 6-46 mm) in pancreatic tissue across a 10-90 mm focal depth range. Patient-specific studies indicated that 0.1, 0.46, and 1.2 cm3 volume of tumor can be ablated in the body of the pancreas for 120 s sonications using a single axial focus (Mode 0), or four, and eight simultaneous foci in a toroidal pattern (Mode 2 and 4, respectively). Hydrophone measurements demonstrated good agreement with simulation. Experiments in which chicken meat was thermally ablated indicated that volumetric ablation can be produced using single or multiple foci. CONCLUSIONS The results of this study demonstrated the feasibility of a novel compact ultrasound applicator design capable of focusing, deep penetration, electronic steering, and volumetric thermal ablation. The proposed applicator can be used for compact endoluminal or laparoscopic delivery of localized ultrasound energy to deep-seated targets.
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Affiliation(s)
- Muhammad Zubair
- Department of Radiation Oncology University of California San Francisco USA
| | - Matthew S. Adams
- Department of Radiation Oncology University of California San Francisco USA
| | - Chris J. Diederich
- Department of Radiation Oncology University of California San Francisco USA
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9
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Gold Nanoparticles-Mediated Photothermal Therapy of Pancreas Using GATE: A New Simulation Platform. Cancers (Basel) 2022; 14:cancers14225686. [PMID: 36428778 PMCID: PMC9688087 DOI: 10.3390/cancers14225686] [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] [Received: 10/24/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022] Open
Abstract
This work presents the first investigation of gold nanorods (GNRs)-based photothermal therapy of the pancreas tumor using the Monte Carlo-based code implemented with Geant4 Application for Emission Tomography (GATE). The model of a human pancreas was obtained by segmenting an abdominal computed tomography (CT) scan, and its physical and chemical properties, were obtained from experimental and theoretical data. In GATE, GNRs-mediated hyperthermal therapy, simple heat diffusion as well as interstitial laser ablation were then modeled in the pancreas tumor by defining the optical parameters of this tissue when it is loaded with GNRs. Two different experimental setups on ex vivo pancreas tissue and GNRs-embedded water were devised to benchmark the developed Monte Carlo-based model for the hyperthermia in the pancreas alone and with GNRs, respectively. The influence of GNRs on heat distribution and temperature increase within the pancreas tumor was compared for two different power values (1.2 W and 2.1 W) when the tumor was exposed to 808 nm laser irradiation and with two different laser applicator diameters. Benchmark tests demonstrated the possibility of the accurate simulating of NPs-assisted thermal therapy and reproducing the experimental data with GATE software. Then, the output of the simulated GNR-mediated hyperthermia emphasized the importance of the precise evaluation of all of the parameters for optimizing the preplanning of cancer thermal therapy. Simulation results on temperature distribution in the pancreas tumor showed that the temperature enhancement caused by raising the power was increased with time in both the tumor with and without GNRs, but it was higher for the GNR-load tumor compared to tumor alone.
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Orrico A, Korganbayev S, Bianchi L, De Landro M, Saccomandi P. Feedback-controlled laser ablation for cancer treatment: comparison of On-Off and PID control strategies . ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2022; 2022:5012-5015. [PMID: 36085688 DOI: 10.1109/embc48229.2022.9871972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Laser ablation is a rising technique used to induce a localized temperature increment for tumor ablation. The outcomes of the therapy depend on the tissue thermal history. Monitoring devices help to assess the tissue thermal response, and their combination with a control strategy can be used to promptly address unexpected temperature changes and thus reduce unwanted thermal effects. In this application, numerical simulations can drive the selection of the laser control settings (i.e., laser power and gain parameters) and allow evaluating the thermal effects of the control strategies. In this study, the influence of different control strategies (On-Off and PID-based controls) is quantified considering the treatment time and the thermal effect on the tissue. Finite element model-based simulations were implemented to model the laser-tissue interaction, the heat-transfer, and the consequent thermal damage in liver tissue with tumor. The laser power was modulated based on the temperature feedback provided within the tumor safety margin. Results show that the chosen control strategy does not have a major influence on the extent of thermal damage but on the treatment duration; the percentage of necrosis within the tumor domain is 100% with both strategies, while the treatment duration is 630 s and 786 s for On-Off and PID, respectively. The choice of the control strategy is a trade-off between treatment duration and unwanted temperature overshoot during closed-loop laser ablation. Clinical Relevance-This work establishes that different temperature-based control of the laser ablation procedure does not have a major influence on the extent of thermal damage but on the duration of treatment.
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Su H, Kwok KW, Cleary K, Iordachita I, Cavusoglu MC, Desai JP, Fischer GS. State of the Art and Future Opportunities in MRI-Guided Robot-Assisted Surgery and Interventions. PROCEEDINGS OF THE IEEE. INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS 2022; 110:968-992. [PMID: 35756185 PMCID: PMC9231642 DOI: 10.1109/jproc.2022.3169146] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Magnetic resonance imaging (MRI) can provide high-quality 3-D visualization of target anatomy, surrounding tissue, and instrumentation, but there are significant challenges in harnessing it for effectively guiding interventional procedures. Challenges include the strong static magnetic field, rapidly switching magnetic field gradients, high-power radio frequency pulses, sensitivity to electrical noise, and constrained space to operate within the bore of the scanner. MRI has a number of advantages over other medical imaging modalities, including no ionizing radiation, excellent soft-tissue contrast that allows for visualization of tumors and other features that are not readily visible by other modalities, true 3-D imaging capabilities, including the ability to image arbitrary scan plane geometry or perform volumetric imaging, and capability for multimodality sensing, including diffusion, dynamic contrast, blood flow, blood oxygenation, temperature, and tracking of biomarkers. The use of robotic assistants within the MRI bore, alongside the patient during imaging, enables intraoperative MR imaging (iMRI) to guide a surgical intervention in a closed-loop fashion that can include tracking of tissue deformation and target motion, localization of instrumentation, and monitoring of therapy delivery. With the ever-expanding clinical use of MRI, MRI-compatible robotic systems have been heralded as a new approach to assist interventional procedures to allow physicians to treat patients more accurately and effectively. Deploying robotic systems inside the bore synergizes the visual capability of MRI and the manipulation capability of robotic assistance, resulting in a closed-loop surgery architecture. This article details the challenges and history of robotic systems intended to operate in an MRI environment and outlines promising clinical applications and associated state-of-the-art MRI-compatible robotic systems and technology for making this possible.
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Affiliation(s)
- Hao Su
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695 USA
| | - Ka-Wai Kwok
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong
| | - Kevin Cleary
- Children's National Health System, Washington, DC 20010 USA
| | - Iulian Iordachita
- Laboratory for Computational Sensing and Robotics (LCSR), Johns Hopkins University, Baltimore, MD 21218 USA
| | - M Cenk Cavusoglu
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH 44106 USA
| | - Jaydev P Desai
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332 USA
| | - Gregory S Fischer
- Department of Robotics Engineering, Worcester Polytechnic Institute, Worcester, MA 01609 USA
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Soltani-Sarvestani MA, Cotin S, Saccomandi P. Unscented Kalman Filtering for Real Time Thermometry During Laser Ablation Interventions. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2022; 2022:3485-3488. [PMID: 36085919 DOI: 10.1109/embc48229.2022.9871282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We present a data-assimilation Bayesian framework in the context of laser ablation for the treatment of cancer. For solving the nonlinear estimation of the tissue temperature evolving during the therapy, the Unscented Kalman Filter (UKF) predicts the next thermal status and controls the ablation process, based on sparse temperature information. The purpose of this paper is to study the outcome of the prediction model based on UKF and to assess the influence of different model settings on the framework performances. In particular, we analyze the effects of the time resolution of the filter and the number and the location of the observations. Clinical Relevance - The application of a data-assimilation approach based on limited temperature information allows to monitor and predict in real-time the thermal effects induced by thermal therapy for tumors.
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Zhang S, Li C, Cao L, Moser MAJ, Zhang W, Qian Z, Zhang B. Modeling and ex vivo experimental validation of liver tissue carbonization with laser ablation. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2022; 217:106697. [PMID: 35180678 DOI: 10.1016/j.cmpb.2022.106697] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 01/26/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVE The purpose of this study was to model the process of liver tissue carbonization with laser ablation (LA). METHODS A dynamic heat source model was proposed and combined with the light distribution model as well as bioheat transfer model to predict the development of tissue carbonization with laser ablation (LA) using an ex vivo porcine liver tissue model. An ex vivo laser ablation experiment with porcine liver tissues using a custom-made 1064 nm bare fiber was then used to verify the simulation results at 3, 5, and 7 W laser administrations for 5 min. The spatiotemporal temperature distribution was monitored by measuring the temperature changes at three points close the fiber during LA. Both the experiment and simulation of the temperature, tissue carbonization zone, and ablation zone were then compared. RESULTS Four stages were recognized in the development of liver tissue carbonization during LA. The growth of the carbonization zone along the fiber axial and radial directions were different in the four stages. The carbonization zone along the fiber axial direction (L2) grew in the four stages with a sharp increase in the initial period and a minor increase in Stage 4. However, the change in the carbonization zone along the fiber radial direction (D2) increased dramatically (Stage 1) to a long-time plateau (Stages 2 and 3) followed by a slow growth in Stage 4. An acceptable agreement between the computer simulation and ex vivo experiment in the temperature changes at the three points was found at all three testing laser administrations. A similar result was also obtained for the dimensions of coagulation zone and ablation zone between the computer simulation and ex vivo experiment (carbonization zone: 2.99± 0.10 vs. 2.78 mm2, 67.39± 0.09 vs. 63.53 mm2, and 90.53± 0.11 vs. 85.15 mm2; ablation zone: 68.95± 0.28 vs. 65.29 mm2, 182.11± 0.24 vs. 213.81 mm2, and 244.80± 0.06 vs. 251.79 mm2 at 3, 5, and 7 W, respectively). CONCLUSION This study demonstrates that the proposed dynamic heat source model combined with the light distribution model as well as bioheat transfer model can predict the development of liver tissue carbonization with an acceptable accuracy. This study contributes to an improved understanding of the LA process in the treatment of liver tumors.
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Affiliation(s)
- Shiguang Zhang
- Intelligent Energy-based Tumor Ablation Laboratory, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China; School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Chunlei Li
- Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai, 201024, China
| | - Lin Cao
- Department of Automatic Control and Systems Engineering, the University of Sheffield, Sheffield, UK
| | - Michael A J Moser
- Department of Surgery, University of Saskatchewan, Saskatoon, Canada
| | - Wenjun Zhang
- Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Zhiqin Qian
- School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Bing Zhang
- Intelligent Energy-based Tumor Ablation Laboratory, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200444, China.
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Schulmann N, Soltani-Sarvestani MA, De Landro M, Korganbayev S, Cotin S, Saccomandi P. Model-Based Thermometry for Laser Ablation Procedure Using Kalman Filters and Sparse Temperature Measurements. IEEE Trans Biomed Eng 2022; 69:2839-2849. [PMID: 35230944 DOI: 10.1109/tbme.2022.3155574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this work, we implement a data-assimilation Bayesian framework for the reconstruction of the spatiotemporal profile of the tissue temperature during laser irradiation. The predictions of a physical model simulating the heat transfer in the tissue are associated with sparse temperature measurements, using an Unscented Kalman Filter. We compare a standard state-estimation filtering procedure with a joint-estimation (state and parameters) approach: whereas in the state-estimation only the temperature is evaluated, in the joint-estimation the filter corrects also uncertain model parameters (i.e., the medium thermal diffusivity, and laser beam properties). We have tested the method on synthetic temperature data, and on the temperature measured on agar-gel phantom and porcine liver with fiber optic sensors. The joint-estimation allows retrieving an accurate estimate of the temperature distribution with a maximal error < 1.5 C in both synthetic and liver 1D data, and < 2 C in phantom 2D data. Our approach allows also suggesting a strategy for optimizing the temperature estimation based on the positions of the sensors. Under the constraint of using only two sensors, optimal temperature estimations are obtained when one sensor is placed in proximity of the source, and the other one is in a non-symmetrical position.
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Akhter F, Manrique-Bedoya S, Moreau C, Smith AL, Feng Y, Mayer KM, Hood RL. Characterization of thermal and optical properties in porcine pancreas tissue. Lasers Surg Med 2022; 54:702-715. [PMID: 35170764 DOI: 10.1002/lsm.23523] [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: 08/11/2021] [Revised: 01/12/2022] [Accepted: 01/21/2022] [Indexed: 11/07/2022]
Abstract
BACKGROUND Photothermal therapies have shown promise for treating pancreatic ductal adenocarcinoma when they can be applied selectively, but off-target heating can frustrate treatment outcomes. Improved strategies leveraging selective binding and localized heating are possible with precision medical approaches such as functionalized gold nanoparticles, but careful control of optical dosage and thermal generation would be imperative. However, the literature review revealed many groups assume liver properties for pancreas tissue or rely on insufficiently rigorous characterization studies. OBJECTIVE The objective of this study was to determine the thermal conductivity and optical properties at 808/1064 nm wavelengths in healthy samples of fresh and frozen porcine pancreas ex vivo. METHODS Thermal conductivity of the porcine pancreas tissue was measured by utilizing a hot plate and two K-type thermocouples. Experimental variables such as tissue sample thickness, hot plate temperature, and heat convection coefficient were estimated through the control experiments utilizing specimens with known thermal conductivity. Optical evaluations assessed light attenuation at the 808 and 1064 nm wavelengths (continuous wave, collimated beam) by measuring the light transmittance and reflectance of different tissue thicknesses. In turn, these measurements were input into an inverse adding-doubling program to estimate the optical absorption and reduced scattering coefficients. RESULTS Interestingly, pancreas tissue thermal conductivity was demonstrated to have no significant difference (p > 0.5) between samples that were fresh, frozen for 7 days, or frozen for 14 days. Conversely, optical property assessment exhibited a significant difference (p < 0.001) between fresh and frozen tissue samples, with increased absorbance and reflectance within the frozen group. However, the optical attenuation values measured were substantially less than that of the liver or reported in previous pancreas studies, suggesting a wide overestimation of these properties. CONCLUSIONS These thermal and optical properties are critical to the development of novel therapeutic strategies like plasmonic photothermal therapy, but perhaps more importantly, are invaluable towards informing better surgical planning and operative technique among the existing thermal approaches for treating pancreas tissue.
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Affiliation(s)
- Forhad Akhter
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Santiago Manrique-Bedoya
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Chris Moreau
- Gastroenterology and Transplant, UT Health San Antonio, San Antonio, Texas, USA
| | - Andrea Lynn Smith
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Yusheng Feng
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA
| | - Kathryn M Mayer
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA
| | - R Lyle Hood
- Department of Mechanical Engineering, University of Texas at San Antonio (UTSA), San Antonio, Texas, USA.,Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, Texas, USA
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Bianchi L, Cavarzan F, Ciampitti L, Cremonesi M, Grilli F, Saccomandi P. Thermophysical and mechanical properties of biological tissues as a function of temperature: a systematic literature review. Int J Hyperthermia 2022; 39:297-340. [DOI: 10.1080/02656736.2022.2028908] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Leonardo Bianchi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Fabiana Cavarzan
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Lucia Ciampitti
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Matteo Cremonesi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Francesca Grilli
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
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Akhter F, Manrique-Bedoya S, Moreau C, Smith AL, Feng Y, Mayer KM, Hood RL. Assessment and Modeling of Plasmonic Photothermal Therapy Delivered via a Fiberoptic Microneedle Device Ex Vivo. Pharmaceutics 2021; 13:2133. [PMID: 34959414 PMCID: PMC8703536 DOI: 10.3390/pharmaceutics13122133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/29/2021] [Accepted: 12/07/2021] [Indexed: 12/23/2022] Open
Abstract
Plasmonic photothermal therapy (PPTT) has potential as a superior treatment method for pancreatic cancer, a disease with high mortality partially attributable to the currently non-selective treatment options. PPTT utilizes gold nanoparticles infused into a targeted tissue volume and exposed to a specific light wavelength to induce selective hyperthermia. The current study focuses on developing this approach within an ex vivo porcine pancreas model via an innovative fiberoptic microneedle device (FMD) for co-delivering light and gold nanoparticles. The effects of laser wavelengths (808 vs. 1064 nm), irradiances (20-50 mW·mm-2), and gold nanorod (GNR) concentrations (0.1-3 nM) on tissue temperature profiles were evaluated to assess and control hyperthermic generation. The GNRs had a peak absorbance at ~800 nm. Results showed that, at 808 nm, photon absorption and subsequent heat generation within tissue without GNRs was 65% less than 1064 nm. The combination of GNRs and 808 nm resulted in a 200% higher temperature rise than the 1064 nm under similar conditions. A computational model was developed to predict the temperature shift and was validated against experimental results with a deviation of <5%. These results show promise for both a predictive model and spatially selective, tunable treatment modality for pancreatic cancer.
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Affiliation(s)
- Forhad Akhter
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Santiago Manrique-Bedoya
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Chris Moreau
- Gastroenterology and Transplant, UT Health San Antonio, San Antonio, TX 78229, USA;
| | - Andrea Lynn Smith
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Yusheng Feng
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
| | - Kathryn M. Mayer
- Department of Physics & Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA;
| | - R. Lyle Hood
- Department of Mechanical Engineering, University of Texas at San Antonio, San Antonio, TX 78249, USA; (F.A.); (S.M.-B.); (A.L.S.); (Y.F.)
- Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA
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Nazmdeh H, Vahabi M, Nazari MA. Finite element modeling of Non-Fourier heat transfer in a cancerous tissue with an injected fat layer during hyperthermia treatment. J Therm Biol 2021; 100:103073. [PMID: 34503810 DOI: 10.1016/j.jtherbio.2021.103073] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/11/2021] [Accepted: 08/04/2021] [Indexed: 11/30/2022]
Abstract
Hyperthermia technique has received much attention over the last decade being less invasive among the others. Laser therapy is among the most commonly investigated types of ablative hyperthermia for treatment of cancer. In this method an external heat source provided by a laser fiber leads the cancerous tissue to the necrosis stage. For its simulation a cylindrical geometry of a breast tissue containing a tumor is acted upon by a Gaussian form of laser radiation. Then the feasibility of a fat layer injection around the tumor during the therapy is investigated numerically. In order to consider the finite speed of heat transfer, dual phase lag (DPL) model is implemented for prediction of the thermal results. The therapy is addressed with and without the presence of a fat layer around the breast tumor. Results show that the temperature in the tumor increases up to 15 % by the injection of a fat layer. Also, the presence of a fat layer around the tumor shows that the irreversible ablation happens at a faster rate.
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Affiliation(s)
- Hossein Nazmdeh
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad Vahabi
- Department of Mechanical Engineering, College of Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
| | - Mohammad Ali Nazari
- Department of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
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Truong VG, Kim H, Park JS, Tran VN, Kang HW. Multiple cylindrical interstitial laser ablations (CILAs) of porcine pancreas in ex vivo and in vivo models. Int J Hyperthermia 2021; 38:1313-1321. [PMID: 34472992 DOI: 10.1080/02656736.2021.1972171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The therapeutic capacity of multiple cylindrical interstitial laser ablations (CILAs) of pancreatic tissue was evaluated with 1064 nm laser light in ex vivo and in vivo porcine pancreatic models. METHODS A diffusing applicator was sequentially employed to deliver 1064 nm laser light in a cylindrical distribution to ablate a large volume of pancreatic tissue. Ex vivo tissue was tested at various power levels (5, 7, and 10 W) under US imaging. An in vivo porcine model was used to evaluate the clinical feasibility of multiple CILAs on pancreatic tissue at 5 W via laparotomy (N = 3). RESULTS Multiple CILAs symmetrically ablated a range of ex vivo tissue volumes (2.4-6.0 cm3) at various power levels. Multiple CILAs warranted a therapeutic capacity of symmetrically ablating in vivo pancreatic tissue. Both ex vivo and in vivo pancreatic tissues after multiple CILAs at 5 W confirmed the absence of or minimal thermal injury to the peripheral tissue and carbonization. CONCLUSIONS The current findings suggest that the collective thermal effects from multiple CILAs can help widely ablate pancreatic tissue with minimal thermal injury. Further in vivo studies will investigate the safety of the proposed CILA treatment as well as acute/chronic responses of pancreatic tissue for clinical translations.
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Affiliation(s)
- Van Gia Truong
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | - Hyeonsoo Kim
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | - Jin-Seok Park
- Division of Gastroenterology, Department of Internal Medicine, Inha University School of Medicine, Inha University Hospital, Incheon, Republic of Korea
| | - Van Nam Tran
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | - Hyun Wook Kang
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea.,Department of Biomedical Engineering and Marine-Integrated Biomedical Technology Center, Pukyong National University, Busan, Republic of Korea
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Kumari S, Sharma N, Sahi SV. Advances in Cancer Therapeutics: Conventional Thermal Therapy to Nanotechnology-Based Photothermal Therapy. Pharmaceutics 2021; 13:1174. [PMID: 34452135 PMCID: PMC8398544 DOI: 10.3390/pharmaceutics13081174] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 12/21/2022] Open
Abstract
In this review, advancement in cancer therapy that shows a transition from conventional thermal therapies to laser-based photothermal therapies is discussed. Laser-based photothermal therapies are gaining popularity in cancer therapeutics due to their overall outcomes. In photothermal therapy, light is converted into heat to destruct the various types of cancerous growth. The role of nanoparticles as a photothermal agent is emphasized in this review article. Magnetic, as well as non-magnetic, nanoparticles have been effectively used in the photothermal-based cancer therapies. The discussion includes a critical appraisal of in vitro and in vivo, as well as the latest clinical studies completed in this area. Plausible evidence suggests that photothermal therapy is a promising avenue in the treatment of cancer.
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Affiliation(s)
- Sangeeta Kumari
- Department of Biological Sciences, University of the Sciences, Philadelphia, PA 19104-4495, USA
| | - Nilesh Sharma
- Department of Biology, Western Kentucky University, 1906 College Heights Boulevard, Bowling Green, KY 42101-1080, USA;
| | - Shivendra V. Sahi
- Department of Biological Sciences, University of the Sciences, Philadelphia, PA 19104-4495, USA
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Truong VG, Jeong S, Park JS, Tran VN, Kim SM, Lee DH, Kang HW. Endoscopic ultrasound (EUS)-guided cylindrical interstitial laser ablation (CILA) on in vivo porcine pancreas. BIOMEDICAL OPTICS EXPRESS 2021; 12:4423-4437. [PMID: 34457423 PMCID: PMC8367258 DOI: 10.1364/boe.427379] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/05/2021] [Accepted: 06/08/2021] [Indexed: 05/27/2023]
Abstract
This study aims to demonstrate the feasibility of cylindrical interstitial laser ablation (CILA) in porcine pancreatic tissue to develop a EUS-guided PC ablation technique with enhanced safety. A diffusing applicator created a uniformly symmetrical laser ablation in pancreatic tissue. Ex vivo tests presented that both ablation thickness and volume increased linearly with the applied power (R2 = 0.96 and 0.90, respectively) without carbonization and fiber degradation. The numerical simulations matched well with the experimental results in terms of temperature development and thermal damage (deviation of ≤ 15%). In vivo tests with EUS confirmed easy insertion and high durability of the diffusing applicator. EUS-guided CILA warranted a feasible therapeutic capacity of ablating in vivo pancreatic tissue. The proposed EUS-guided CILA can be a feasible therapeutic approach to treat PC with predictable thermal ablation and enhanced safety.
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Affiliation(s)
- Van Gia Truong
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
- These authors contributed equally to this work
| | - Seok Jeong
- Department of Internal Medicine, Inha University School of Medicine, and the National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders, Inha University Hospital, Incheon, Republic of Korea
- These authors contributed equally to this work
| | - Jin-Seok Park
- Department of Internal Medicine, Inha University School of Medicine, and the National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders, Inha University Hospital, Incheon, Republic of Korea
| | - Van Nam Tran
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
| | - Sung Min Kim
- Bluecore Company, Inc., Busan, Republic of Korea
| | - Don Haeng Lee
- Department of Internal Medicine, Inha University School of Medicine, and the National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders, Inha University Hospital, Incheon, Republic of Korea
| | - Hyun Wook Kang
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan, Republic of Korea
- Department of Biomedical Engineering, Pukyong National University, Busan, Republic of Korea
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Mohammadi A, Bianchi L, Korganbayev S, De Landro M, Saccomandi P. Thermomechanical Modeling of Laser Ablation Therapy of Tumors: Sensitivity Analysis and Optimization of Influential Variables. IEEE Trans Biomed Eng 2021; 69:302-313. [PMID: 34181533 DOI: 10.1109/tbme.2021.3092889] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In cancer treatment, laser ablation is a promising technique used to induce localized thermal damage. Different variables influence the temperature distribution in the tissue and the resulting therapy efficacy; thus, the optimal therapy settings are required for obtaining the desired clinical outcome. In this work, thermomechanical modeling of contactless laser ablation was implemented to analyze the sensitivity of independent variables on the optimal treatment conditions. The Finite Element Method was utilized to solve the governing equations, i.e., the bioheat, mechanical deformation, and the Navier-Stokes equations. Validation of the model was evaluated by comparing experimental and simulated temperatures, which indicated high accuracy for estimating temperature. In particular, the results showed that the model is capable of estimating temperature with a good correlation factor (R=0.98) and low Mean Absolute Error (3.9 C). A sensitivity analysis based on laser irradiation time, power, beam distribution, and the blood vessel depth on temperature distribution and fraction of necrotic tissue was performed. Based on the most significant variables i.e., laser irradiation time and power, an optimization process was performed. This resulted into an indication of the optimal therapy settings for achieving maximum procedure efficiency i.e., the required fraction of necrotic tissue within the target volume, constituted by tumor and safety margins around it.
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Bianchi L, Korganbayev S, Orrico A, De Landro M, Saccomandi P. Quasi-distributed fiber optic sensor-based control system for interstitial laser ablation of tissue: theoretical and experimental investigations. BIOMEDICAL OPTICS EXPRESS 2021; 12:2841-2858. [PMID: 34168905 PMCID: PMC8194627 DOI: 10.1364/boe.419541] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/12/2021] [Accepted: 03/23/2021] [Indexed: 05/08/2023]
Abstract
This work proposes the quasi-distributed real-time monitoring and control of laser ablation (LA) of liver tissue. To confine the thermal damage, a pre-planning stage of the control strategy based on numerical simulations of the bioheat-transfer was developed to design the control parameters, then experimentally assessed. Fiber Bragg grating (FBG) sensors were employed to design the automatic thermometry system used for temperature feedback control for interstitial LA. The tissue temperature was maintained at a pre-set value, and the influence of different sensor locations (on the direction of the beam propagation and backward) on the thermal outcome was evaluated in comparison with the uncontrolled case. Results show that the implemented computational model was able to properly describe the temperature evolution of the irradiated tissue. Furthermore, the realized control strategy allowed for the accurate confinement of the laser-induced temperature increase, especially when the temperature control was actuated by sensors located in the direction of the beam propagation, as confirmed by the calculated fractions of necrotic tissues (e.g., 23 mm3 and 53 mm3 for the controlled and uncontrolled LA, respectively).
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Alqarni SA, Willmore WG, Albert J, Smelser CW. Self-monitored and optically powered fiber-optic device for localized hyperthermia and controlled cell death in vitro. APPLIED OPTICS 2021; 60:2400-2411. [PMID: 33690341 DOI: 10.1364/ao.411576] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Localized hyperthermia therapy involves heating a small volume of tissue in order to kill cancerous cells selectively and with limited damage to healthy cells and surrounding tissue. However, these features are only achievable through real-time control of the tissue temperature and heated volume, both of which are difficult to obtain with current heating systems and techniques. This work introduces an optical fiber-based active heater that acts both as a miniature heat source and as a thermometer. The heat-induced damage in the tissue is caused by the conductive heat transfer from the surface of the device, while the heat is generated in an absorptive coating on the fiber by near-infrared light redirected from the fiber core to the surface by a tilted fiber Bragg grating inscribed in the fiber core. Simultaneous monitoring of the reflection spectrum of the grating provides a measure of the local temperature. Localized temperature increases between 0°C and 100°C in 10 mm-long/5 mm-diameter cylindrical volumes are obtained with continuous-wave pump power levels up to 1.8 W. Computational and experimental results further indicate that the temperature rise and dimensions of the heated volume can be maintained at a nearly stable level determined by the input optical power.
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Zaltieri M, Massaroni C, Cauti FM, Schena E. Techniques for Temperature Monitoring of Myocardial Tissue Undergoing Radiofrequency Ablation Treatments: An Overview. SENSORS (BASEL, SWITZERLAND) 2021; 21:1453. [PMID: 33669692 PMCID: PMC7922285 DOI: 10.3390/s21041453] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/12/2021] [Accepted: 02/16/2021] [Indexed: 12/18/2022]
Abstract
Cardiac radiofrequency ablation (RFA) has received substantial attention for the treatment of multiple arrhythmias. In this scenario, there is an ever-growing demand for monitoring the temperature trend inside the tissue as it may allow an accurate control of the treatment effects, with a consequent improvement of the clinical outcomes. There are many methods for monitoring temperature in tissues undergoing RFA, which can be divided into invasive and non-invasive. This paper aims to provide an overview of the currently available techniques for temperature detection in this clinical scenario. Firstly, we describe the heat generation during RFA, then we report the principle of work of the most popular thermometric techniques and their features. Finally, we introduce their main applications in the field of cardiac RFA to explore the applicability in clinical settings of each method.
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Affiliation(s)
- Martina Zaltieri
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
| | - Carlo Massaroni
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
| | - Filippo Maria Cauti
- Arrhythmology Unit, Cardiology Division, S. Giovanni Calibita Hospital, Isola Tiberina, 00186 Rome, Italy;
| | - Emiliano Schena
- Department of Engineering, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo, 00128 Rome, Italy; (M.Z.); (C.M.)
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Asadi S, Bianchi L, De Landro M, Korganbayev S, Schena E, Saccomandi P. Laser-induced optothermal response of gold nanoparticles: From a physical viewpoint to cancer treatment application. JOURNAL OF BIOPHOTONICS 2021; 14:e202000161. [PMID: 32761778 DOI: 10.1002/jbio.202000161] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/15/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
Gold nanoparticles (GNPs)-based photothermal therapy (PTT) is a promising minimally invasive thermal therapy for the treatment of focal malignancies. Although GNPs-based PTT has been known for over two decades and GNPs possess unique properties as therapeutic agents, the delivery of a safe and effective therapy is still an open question. This review aims at providing relevant and recent information on the usage of GNPs in combination with the laser to treat cancers, pointing out the practical aspects that bear on the therapy outcome. Emphasis is given to the assessment of the GNPs' properties and the physical mechanisms underlying the laser-induced heat generation in GNPs-loaded tissues. The main techniques available for temperature measurement and the current theoretical simulation approaches predicting the therapeutic outcome are reviewed. Topical challenges in delivering safe thermal dosage are also presented with the aim to discuss the state-of-the-art and the future perspective in the field of GNPs-mediated PTT.
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Affiliation(s)
- Somayeh Asadi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Leonardo Bianchi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Martina De Landro
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | | | - Emiliano Schena
- Laboratory of Measurement and Biomedical Instrumentation, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
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Korganbayev S, Orrico A, Bianchi L, Paloschi D, Wolf A, Dostovalov A, Saccomandi P. PID Controlling Approach Based on FBG Array Measurements for Laser Ablation of Pancreatic Tissues. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2021; 70:1-9. [PMID: 0 DOI: 10.1109/tim.2021.3112790] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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Korganbayev S, Orrico A, Bianchi L, De Landro M, Wolf A, Dostovalov A, Saccomandi P. Closed-Loop Temperature Control Based on Fiber Bragg Grating Sensors for Laser Ablation of Hepatic Tissue. SENSORS 2020; 20:s20226496. [PMID: 33203048 PMCID: PMC7697476 DOI: 10.3390/s20226496] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/27/2020] [Accepted: 11/11/2020] [Indexed: 12/13/2022]
Abstract
Laser ablation (LA) of cancer is a minimally invasive technique based on targeted heat release. Controlling tissue temperature during LA is crucial to achieve the desired therapeutic effect in the organs while preserving the healthy tissue around. Here, we report the design and implementation of a real-time monitoring system performing closed-loop temperature control, based on fiber Bragg grating (FBG) spatial measurements. Highly dense FBG arrays (1.19 mm length, 0.01 mm edge-to-edge distance) were inscribed in polyimide-coated fibers using the femtosecond point-by-point writing technology to obtain the spatial resolution needed for accurate reconstruction of high-gradient temperature profiles during LA. The zone control strategy was implemented such that the temperature in the laser-irradiated area was maintained at specific set values (43 and 55 °C), in correspondence to specific radii (2 and 6 mm) of the targeted zone. The developed control system was assessed in terms of measured temperature maps during an ex vivo liver LA. Results suggest that the temperature-feedback system provides several advantages, including controlling the margins of the ablated zone and keeping the maximum temperature below the critical values. Our strategy and resulting analysis go beyond the state-of-the-art LA regulation techniques, encouraging further investigation in the identification of the optimal control-loop.
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Affiliation(s)
- Sanzhar Korganbayev
- Department of Mechanical Engineering, Politecnico di Milano Milan, 20133 Milano MI, Italy; (A.O.); (L.B.); (M.D.L.); (P.S.)
- Correspondence: ; Tel.: +39-348-776-1649
| | - Annalisa Orrico
- Department of Mechanical Engineering, Politecnico di Milano Milan, 20133 Milano MI, Italy; (A.O.); (L.B.); (M.D.L.); (P.S.)
| | - Leonardo Bianchi
- Department of Mechanical Engineering, Politecnico di Milano Milan, 20133 Milano MI, Italy; (A.O.); (L.B.); (M.D.L.); (P.S.)
| | - Martina De Landro
- Department of Mechanical Engineering, Politecnico di Milano Milan, 20133 Milano MI, Italy; (A.O.); (L.B.); (M.D.L.); (P.S.)
| | - Alexey Wolf
- Laboratory of Fiber Optics, Institute of Automation and Electrometry SB RAS, Novosibirsk 630090, Russia; (A.W.); (A.D.)
| | - Alexander Dostovalov
- Laboratory of Fiber Optics, Institute of Automation and Electrometry SB RAS, Novosibirsk 630090, Russia; (A.W.); (A.D.)
| | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano Milan, 20133 Milano MI, Italy; (A.O.); (L.B.); (M.D.L.); (P.S.)
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Manrique-Bedoya S, Abdul-Moqueet M, Lopez P, Gray T, Disiena M, Locker A, Kwee S, Tang L, Hood RL, Feng Y, Large N, Mayer KM. Multiphysics Modeling of Plasmonic Photothermal Heating Effects in Gold Nanoparticles and Nanoparticle Arrays. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:17172-17182. [PMID: 34367407 PMCID: PMC8341645 DOI: 10.1021/acs.jpcc.0c02443] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Induced hyperthermia has been demonstrated as an effective oncological treatment due to the reduced heat tolerance of most malignant tissues; however, most techniques for heat generation within a target volume are insufficiently selective, inducing heating and unintended damage to surrounding healthy tissues. Plasmonic photothermal therapy (PPTT) utilizes light in the near-infrared (NIR) region to induce highly localized heating in gold nanoparticles, acting as exogenous chromophores, while minimizing heat generation in nearby tissues. However, optimization of treatment parameters requires extensive in vitro and in vivo studies for each new type of pathology and tissue targeted for treatment, a process that can be substantially reduced by implementing computational modeling. Herein, we describe the development of an innovative model based on the finite element method (FEM) that unites photothermal heating physics at the nanoscale with the micron scale to predict the heat generation of both single and arrays of gold nanoparticles. Plasmonic heating from laser illumination is computed for gold nanoparticles with three different morphologies: nanobipyramids, nanorods, and nanospheres. Model predictions based on laser illumination of nanorods at a visible wavelength (655 nm) are validated through experiments, which demonstrate a temperature increase of 5 °C in the viscinity of the nanorod array when illuminated by a 150 mW red laser. We also present a predictive model of the heating effect induced at 810 nm, wherein the heating efficiencies of the various morphologies sharing this excitation peak are compared. Our model shows that the nanorod is the most effective at heat generation in the isolated scenario, and arrays of 91 nm long nanorods reached hyperthermic levels (an increase of at least 5 °C) within a volume of over 20 μm3.
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Affiliation(s)
- Santiago Manrique-Bedoya
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Mohammad Abdul-Moqueet
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Priscilla Lopez
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Tara Gray
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Matthew Disiena
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Andrew Locker
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Sharon Kwee
- Department of Biomedical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Liang Tang
- Department of Biomedical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - R Lyle Hood
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Yusheng Feng
- Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Nicolas Large
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kathryn M Mayer
- Department of Physics and Astronomy, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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Jermakowicz WJ, Wu C, Neal E, Cajigas I, D'Haese PF, Donahue DJ, Sharan AD, Vale FL, Jagid JR. Clinically Significant Visual Deficits after Laser Interstitial Thermal Therapy for Mesiotemporal Epilepsy. Stereotact Funct Neurosurg 2020; 97:347-355. [PMID: 31935727 DOI: 10.1159/000504856] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 11/18/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Laser interstitial thermal therapy (LITT) has recently gained popularity as a minimally invasive surgical option for the treatment of mesiotemporal epilepsy (mTLE). Similar to traditional open procedures for epilepsy, the most frequent neurological complications of LITT are visual deficits; however, a critical analysis of these injuries is lacking. OBJECTIVES To evaluate the visual deficits that occur after LITT for mTLE and their etiology. METHOD We surveyed five academic epilepsy centers that regularly perform LITT for cases of self-reported postoperative visual deficits. For these patients all pre-, intra- and postoperative MRIs were co-registered with an anatomic atlas derived from 7T MRI data. This was used to estimate thermal injury to early visual pathways and measure imaging variables relevant to the LITT procedure. Using logistic regression, we then compared 14 variables derived from demographics, mesiotemporal anatomy, and the surgical procedure for the patients with visual deficits to a normal cohort comprised of the first 30 patients to undergo this procedure at a single institution. RESULTS Of 90 patients that underwent LITT for mTLE, 6 (6.7%) reported a postoperative visual deficit. These included 2 homonymous hemianopsias (HHs), 2 quadrantanopsias, and 2 cranial nerve (CN) IV palsies. These deficits localized to the posterior aspect of the ablation, corresponding to the hippocampal body and tail, and tended to have greater laser energy delivered in that region than the normal cohort. The patients with HH had insult localized to the lateral geniculate nucleus, which was -associated with young age and low choroidal fissure CSF volume. Quadrantanopsia, likely from injury to the optic radiation in Meyer's loop, was correlated with a lateral trajectory and excessive energy delivered at the tail end of the ablation. Patients with CN IV injury had extension of contrast to the tentorial edge associated with a mesial laser trajectory. CONCLUSIONS LITT for epilepsy may be complicated by various classes of visual deficit, each with distinct etiology and clinical significance. It is our hope that by better understanding these injuries and their mechanisms we can eventually reduce their occurrence by identifying at-risk patients and trajectories and appropriately tailoring the ablation procedure.
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Affiliation(s)
| | - Chengyuan Wu
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Elliot Neal
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, Florida, USA
| | - Iahn Cajigas
- Department of Neurological Surgery, University of Miami, Miami, Florida, USA
| | - Pierre-François D'Haese
- Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, Tennessee, USA
| | - David J Donahue
- Department of Neurological Surgery, Cook Children's Medical Center, Fort Worth, Texas, USA
| | - Ashwini D Sharan
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Fernando L Vale
- Department of Neurosurgery and Brain Repair, University of South Florida, Tampa, Florida, USA
| | - Jonathan R Jagid
- Department of Neurological Surgery, University of Miami, Miami, Florida, USA,
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Andreozzi A, Iasiello M, Tucci C. An overview of mathematical models and modulated-heating protocols for thermal ablation. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/bs.aiht.2020.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Giurazza F, Massaroni C, Silvestri S, Zobel BB, Schena E. Preliminary analysis of ultrasound elastography imaging-based thermometry on non-perfused ex vivo swine liver. J Ultrasound 2019; 23:69-75. [PMID: 31541360 DOI: 10.1007/s40477-019-00407-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 09/11/2019] [Indexed: 01/20/2023] Open
Abstract
AIMS Real-time monitoring of tissue temperature during percutaneous tumor ablation improves treatment efficacy, leading clinicians in adjustment of treatment settings. This study aims at assessing feasibility of ultrasound thermometry during laser ablation of biological tissue using a specific ultrasound imaging techniques based on elastography acoustic radiation force impulse (ARFI). METHODS ARFI uses high-intensity focused ultrasound pulses to generate 'radiation force' in tissue; this provokes tissue displacements trackable using correlation-based ultrasound methods: the sensitivity of shear waves velocity is able to detect temperature changes. Experiments were carried out using a Nd:YAG laser (power: 5 W) in three non-perfused ex vivo pig livers. In each organ, a thermocouple was placed close to the applicator tip (distance range 1.5-2.5 cm) used to record a reference temperature. Positioning of laser applicator and thermocouple was eco-guided. The organ was scanned by an echography system equipped with ARFI; propagation velocity was measured in a region of interest of 1 × 0.5 cm located close to thermocouple, to investigate influence of tissue temperature on shear waves velocity. RESULTS Shear wave velocity has a very low sensitivity to temperature up to 55-60 °C, and in all cases, velocity is < 5 m s-1; for temperature > 55-60 °C, velocity shows a steep increment. The system measures a value "over limit", meaning a velocity > 5 m s-1. CONCLUSIONS Ultrasound thermometry during laser ablation of biological tissue based on elastography shows an abrupt output change at temperatures > 55-60 °C. This issue can have a relevant clinical impact, considering tumor necrosis when temperature crosses 55 °C to define the boundary of damaged volume.
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Affiliation(s)
- Francesco Giurazza
- Interventional Radiology Department, Cardarelli Hospital, Via Cardarelli 9, 80100, Naples, Italy.
| | - Carlo Massaroni
- Measurement and Biomedical Instrumentation Lab, Università Campus Bio-Medico di Roma, Via A. Del Portillo 200, 00198, Rome, Italy
| | - Sergio Silvestri
- Measurement and Biomedical Instrumentation Lab, Università Campus Bio-Medico di Roma, Via A. Del Portillo 200, 00198, Rome, Italy
| | - Bruno Beomonte Zobel
- Radiology Department, Università Campus Bio-Medico di Roma, Via A. Del Portillo 200, 00198, Rome, Italy
| | - Emiliano Schena
- Measurement and Biomedical Instrumentation Lab, Università Campus Bio-Medico di Roma, Via A. Del Portillo 200, 00198, Rome, Italy
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Kempski KM, Wiacek A, Graham M, González E, Goodson B, Allman D, Palmer J, Hou H, Beck S, He J, Bell MAL. In vivo photoacoustic imaging of major blood vessels in the pancreas and liver during surgery. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-12. [PMID: 31411010 PMCID: PMC7006046 DOI: 10.1117/1.jbo.24.12.121905] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 07/22/2019] [Indexed: 05/07/2023]
Abstract
Abdominal surgeries carry considerable risk of gastrointestinal and intra-abdominal hemorrhage, which could possibly cause patient death. Photoacoustic imaging is one solution to overcome this challenge by providing visualization of major blood vessels during surgery. We investigate the feasibility of in vivo blood vessel visualization for photoacoustic-guided liver and pancreas surgeries. In vivo photoacoustic imaging of major blood vessels in these two abdominal organs was successfully achieved after a laparotomy was performed on two swine. Three-dimensional photoacoustic imaging with a robot-controlled ultrasound (US) probe and color Doppler imaging were used to confirm vessel locations. Blood vessels in the in vivo liver were visualized with energies of 20 to 40 mJ, resulting in 10 to 15 dB vessel contrast. Similarly, an energy of 36 mJ was sufficient to visualize vessels in the pancreas with up to 17.3 dB contrast. We observed that photoacoustic signals were more focused when the light source encountered a major vessel in the liver. This observation can be used to distinguish major blood vessels in the image plane from the more diffuse signals associated with smaller blood vessels in the surrounding tissue. A postsurgery histopathological analysis was performed on resected pancreatic and liver tissues to explore possible laser-related damage. Results are generally promising for photoacoustic-guided abdominal surgery when the US probe is fixed and the light source is used to interrogate the surgical workspace. These findings are additionally applicable to other procedures that may benefit from photoacoustic-guided interventional imaging of the liver and pancreas (e.g., biopsy and guidance of radiofrequency ablation lesions in the liver).
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Affiliation(s)
- Kelley M. Kempski
- University of Delaware, Department of Biomedical Engineering, Newark, Delaware, United States
| | - Alycen Wiacek
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Michelle Graham
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Eduardo González
- Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
| | - Bria Goodson
- Delta State University, Department of Biology, Cleveland, Mississippi, United States
| | - Derek Allman
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Jasmin Palmer
- Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts, United States
| | - Huayu Hou
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
| | - Sarah Beck
- Johns Hopkins Medicine, Department of Molecular and Comparative Pathobiology, Baltimore, Maryland, United States
| | - Jin He
- Johns Hopkins Medicine, Department of Surgery, Baltimore, Maryland, United States
- Johns Hopkins Medicine, Department of Oncology, Baltimore, Maryland, United States
| | - Muyinatu A. Lediju Bell
- Johns Hopkins University, Department of Electrical and Computer Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Department of Biomedical Engineering, Baltimore, Maryland, United States
- Johns Hopkins University, Department of Computer Science, Baltimore, Maryland, United States
- Address all correspondence to Muyinatu A. Lediju Bell, E-mail:
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Predictive modeling of brain tumor laser ablation dynamics. J Neurooncol 2019; 144:193-203. [PMID: 31240526 DOI: 10.1007/s11060-019-03220-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/16/2019] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Laser interstitial thermal therapy (LITT) is a novel MR thermometry-guided thermoablative tool revolutionizing the clinical management of brain tumors. A limitation of LITT is our inability to estimate a priori how tissues will respond to thermal energy, which hinders treatment planning and delivery. The aim of this study was to determine whether brain tumor LITT ablation dynamics may be predicted by features of the preoperative MRI and the relevance of these data, if any, to the recurrence of metastases after LITT. METHODS Intraoperative thermal damage estimate (TDE) map pixels representative of irreversible damage were retrospectively quantified relative to ablation onset for 101 LITT procedures. Raw TDE pixel counts and TDE pixel counts modelled with first order dynamics were related to eleven independent variables derived from the preoperative MRI, demographics, laser settings, and tumor pathology. Stepwise regression analysis generated predictive models of LITT dynamics, and leave-one-out cross validation evaluated the accuracy of these models at predicting TDE pixel counts solely from the independent variables. Using a deformable atlas, TDE maps were co-registered to the immediate post-ablation MRI, allowing comparison of predicted and actual ablation sizes. RESULTS Brain tumor TDE pixel counts modelled with first order dynamics, but not raw pixel counts, are correlated with the independent variables. Independent variables showing strong relations to the TDE pixel measures include T1 gadolinium and T2 signal, perfusion, and laser power. Associations with tissue histopathology are minimal. Leave-one-out analysis demonstrates that predictive models using these independent variables account for 77% of the variance observed in TDE pixel counts. Analysis of metastases treated revealed a trend towards the over-estimation of LITT effects by TDE maps during rapid ablations, which was associated with tumor recurrence. CONCLUSIONS Features of the preoperative MRI are predictive of LITT ablation dynamics and could eventually be used to improve the clinical efficacy with which LITT is delivered to brain tumors.
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Quero G, Saccomandi P, Kwak JM, Dallemagne B, Costamagna G, Marescaux J, Mutter D, Diana M. Modular laser-based endoluminal ablation of the gastrointestinal tract: in vivo dose-effect evaluation and predictive numerical model. Surg Endosc 2018; 33:3200-3208. [PMID: 30456508 DOI: 10.1007/s00464-018-6603-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 11/13/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Endoscopic submucosal dissection allows for "en bloc" removal of early gastrointestinal neoplasms. However, it is technically demanding and time-consuming. Alternatives could rely on energy-based techniques. We aimed to evaluate a predictive numerical model of thermal damage to preoperatively define optimal laser settings allowing for a controlled ablation down to the submucosa, and the ability of confocal endomicroscopy to provide damage information. MATERIALS AND METHODS A Nd:YAG laser was applied onto the gastric mucosa of 21 Wistar rats on 10 spots (total 210). Power settings ranging from 0.5 to 2.5W were applied during 1-12 s, with a consequent energy delivery varying from 0.5 to 30 J. Out of the 210 samples, a total of 1050 hematoxilin-eosin stained slides were obtained. To evaluate thermal injury, the ratio between the damage depth (DD) over the mucosa and the submucosa thickness (T) was calculated. Effective and safe ablation was considered for a DD/T ratio ≤ 1 (only mucosal and submucosal damage). Confocal endomicroscopy was performed before and after ablation. A numerical model, using human physical properties, was developed to predict thermal damage. RESULTS No full-thickness perforations were detected. On histology, the DD/T ratio at 0.5 J was 0.57 ± 0.21, significantly lower when compared to energies ranging from 15 J (a DD/T ratio = 1.2 ± 0.3; p < 0.001) until 30 J (a DD/T ratio = 1.33 ± 0.31; p < 0.001). Safe mucosal and submucosal ablations were achieved applying energy between 4 and 12 J, never impairing the muscularis propria. Confocal endomicroscopy showed a distorted gland architecture. The predicted damage depth demonstrated a significant positive linear correlation with the experimental data (Pearson's r 0.85; 95% CI 0.66-0.94). CONCLUSIONS Low-power settings achieved effective and safe mucosal and submucosal ablation. The numerical model allowed for an accurate prediction of the ablated layers. Confocal endomicroscopy provided real-time thermal damage visualization. Further studies on larger animal models are required.
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Affiliation(s)
- Giuseppe Quero
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - Paola Saccomandi
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France.,Department of Mechanical Engineering, Politecnico di Milano, Milan, Italy
| | - Jung-Myun Kwak
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France.,Department of Surgery, Korea University College of Medicine, Seoul, Republic of Korea
| | - Bernard Dallemagne
- IRCAD, Research Institute Against Cancer of the Digestive System, 1, Place de l'Hôpital, 67091, Strasbourg, France
| | - Guido Costamagna
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France
| | - Jacques Marescaux
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France.,IRCAD, Research Institute Against Cancer of the Digestive System, 1, Place de l'Hôpital, 67091, Strasbourg, France
| | - Didier Mutter
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France.,IRCAD, Research Institute Against Cancer of the Digestive System, 1, Place de l'Hôpital, 67091, Strasbourg, France.,Department of General, Digestive and Endocrine Surgery, University Hospital of Strasbourg, Strasbourg, France
| | - Michele Diana
- IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg, France. .,IRCAD, Research Institute Against Cancer of the Digestive System, 1, Place de l'Hôpital, 67091, Strasbourg, France. .,Department of General, Digestive and Endocrine Surgery, University Hospital of Strasbourg, Strasbourg, France.
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Saccomandi P, Lapergola A, Longo F, Schena E, Quero G. Thermal ablation of pancreatic cancer: A systematic literature review of clinical practice and pre-clinical studies. Int J Hyperthermia 2018; 35:398-418. [PMID: 30428728 DOI: 10.1080/02656736.2018.1506165] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
PURPOSE Pancreatic cancer is a challenging malignancy with low treatment option and poor life expectancy. Thermal ablation techniques were proposed as alternative treatment options, especially in advanced stages and for unfit-for-surgery patients. This systematic review describes the thermal ablative techniques -i.e., Laser (LA), Radiofrequency (RFA), Microwave (MWA) Ablation, High-Intensity Focused Ultrasound (HIFU) and cryoablation- available for pancreatic cancer treatment. Additionally, an analysis of the efficacy, complication rate and overall survival for each technique is conducted. MATERIAL AND METHODS This review collects the ex vivo, preclinical and clinical studies presenting the use of thermal techniques in the pancreatic cancer treatment, searched up to March 2018 in PubMed and Medline. Abstracts, letters-to-the-editor, expert opinions, reviews and non-English language manuscripts were excluded. RESULTS Sixty-five papers were included. For the ex vivo and preclinical studies, there are: 12 records for LA, 8 for RFA, 0 for MWA, 6 for HIFU, 1 for cryoablation and 3 for hybrid techniques. For clinical studies, 1 paper for LA, 14 for RFA, 1 for MWA, 17 for HIFU, 1 for cryoablation and 1 for hybrid techniques. CONCLUSIONS Important technological advances are presented in ex vivo and preclinical studies, as the real-time thermometry, nanotechnology and hybrid techniques to enhance the thermal outcome. Conversely, a lack of standardization in the clinical employment of the procedures emerged, leading to contrasting results on the safety and feasibility of some analyzed techniques. Uniform conclusions on the safety and feasibility of these techniques for pancreatic cancer will require further structured investigation.
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Affiliation(s)
- Paola Saccomandi
- a IHU-Strasbourg Institute of Image-Guided Surgery , Strasbourg , France.,b Departement of Mechanical Engineering, Politecnico di Milano , Milan , Italy
| | - Alfonso Lapergola
- a IHU-Strasbourg Institute of Image-Guided Surgery , Strasbourg , France.,c Università G. D'Annunzio , Chieti , Italy
| | - Fabio Longo
- a IHU-Strasbourg Institute of Image-Guided Surgery , Strasbourg , France.,d Fondazione Policlinico Universitario Agostino Gemelli IRCCS , Rome , Italy
| | | | - Giuseppe Quero
- d Fondazione Policlinico Universitario Agostino Gemelli IRCCS , Rome , Italy
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Wu X, Zhang K, Chen Y, Wang R, Chen L, Zhang A, Hu B. Theoretical and experimental study of dual-fiber laser ablation for prostate cancer. PLoS One 2018; 13:e0206065. [PMID: 30356335 PMCID: PMC6200234 DOI: 10.1371/journal.pone.0206065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 10/06/2018] [Indexed: 11/18/2022] Open
Abstract
Single-fiber laser treatment of the prostate has been widely accepted in the clinic due to its minimal invasiveness and high controllability. However, for large tumors, multiple insertions of the laser probe would be needed to achieve full coverage of the tumor, increasing the complexity of the treatment and occasionally resulting in the incomplete killing of tumor cells due to a mismatch between the planned insertion location and the actual probe insertion location. Treatment with a dual-fiber laser results in greater lesion coverage following a single insertion of the probe, with the lesion coverage being even greater than the sum of the coverage of two sequential insertion of a single-fiber laser probe, potentially reducing treatment time and clinical complications. Both theoretical and experimental analyses have been performed to evaluate the proposed dual-fiber laser treatment. A finite element model was established to simulate the treatment process. The simulation results indicated that there is a clear difference between the ablation coverage created using dual-fiber laser ablation and that created using the superposition of sequential single-fiber laser ablation. In addition, the coverage is dependent on the spacing distance between the two fibers. Both ex vivo and in vivo canine prostate tissues were treated by dual-fiber laser ablation, with lesions analyzed by magnetic resonance imaging (MRI), ultrasound imaging, and pathology. The results demonstrate that dual-fiber laser ablation can markedly increase the range of the ablation zone when compared with single-fiber modes. The safety and feasibility of dual-fiber laser treatment has been confirmed, and a treatment plan using dual-fiber laser ablation has also been proposed.
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Affiliation(s)
- Xing Wu
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People’s Hospital, Shanghai, China
- Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Kangwei Zhang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yini Chen
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People’s Hospital, Shanghai, China
- Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Ren Wang
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People’s Hospital, Shanghai, China
- Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Lei Chen
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People’s Hospital, Shanghai, China
- Shanghai Institute of Ultrasound in Medicine, Shanghai, China
| | - Aili Zhang
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
- * E-mail: (AZ); (BH)
| | - Bing Hu
- Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People’s Hospital, Shanghai, China
- Shanghai Institute of Ultrasound in Medicine, Shanghai, China
- * E-mail: (AZ); (BH)
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Han D, Xu J, Wang Z, Yang N, Li X, Qian Y, Li G, Dai R, Xu S. Penetrating effect of high-intensity infrared laser pulses through body tissue. RSC Adv 2018; 8:32344-32357. [PMID: 35547482 PMCID: PMC9086259 DOI: 10.1039/c8ra05285a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 09/02/2018] [Indexed: 12/12/2022] Open
Abstract
Researchers have utilized infrared (IR) lasers as energy sources in laser therapy for curing skin diseases and skin injuries with remarkable effects. Preliminary experiments have also shown that high-intensity IR laser pulses could penetrate thick body tissues, resulting in remarkable effects for recovery from injuries in deep muscles and cartilage tissues. However, for deep-level IR laser therapy, it is unclear how much of the laser power density penetrates the body tissues at certain depths and which of the three major effects of laser irradiation, namely, laser-induced photo-chemical effect, photo-thermal effect and mechanical dragging effect, play a key role in the curing process. Thus, in this study, we developed micro-sized thin-film thermocouple (TFTC) arrays on freestanding Si3N4 thin-film windows as sensors for laser power density and local temperature. These devices showed excellent linear responses in output voltage to laser power density with wavelengths in the range of 325-1064 nm, and also indicated the local temperature at the laser spot. We systematically measured the penetrating effect and thermal effect through thick porcine tissues for high-intensity IR pulses with a laser system used in clinical treatment and subtracted the attenuation parameters for the porcine skin, fat and muscle tissue from the experimental data. The results offered reliable quantitative references for safe irradiation doses of high-intensity IR laser pulses in practical laser therapy.
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Affiliation(s)
- Danhong Han
- Key Laboratory for the AGA & Chemistry of Nanodevices, Department of Electronics, Peking University Beijing 100871 P. R. China +86-10-62757261
| | - Jingjing Xu
- Key Laboratory for the AGA & Chemistry of Nanodevices, Department of Electronics, Peking University Beijing 100871 P. R. China +86-10-62757261
| | - Zhenhai Wang
- Key Laboratory for the AGA & Chemistry of Nanodevices, Department of Electronics, Peking University Beijing 100871 P. R. China +86-10-62757261
| | - Nana Yang
- Key Laboratory for the AGA & Chemistry of Nanodevices, Department of Electronics, Peking University Beijing 100871 P. R. China +86-10-62757261
| | - Xunzhou Li
- TED Healthcare Technology Ltd Unit 350, 3/F, Block B, Beijing Venture Plaza, A11, An Xiang Bei li Rd. Beijing 100101 P. R. China
| | - Yingying Qian
- TED Healthcare Technology Ltd Unit 350, 3/F, Block B, Beijing Venture Plaza, A11, An Xiang Bei li Rd. Beijing 100101 P. R. China
| | - Ge Li
- TED Healthcare Technology Ltd Unit 350, 3/F, Block B, Beijing Venture Plaza, A11, An Xiang Bei li Rd. Beijing 100101 P. R. China
| | - Rujun Dai
- TED Healthcare Technology Ltd Unit 350, 3/F, Block B, Beijing Venture Plaza, A11, An Xiang Bei li Rd. Beijing 100101 P. R. China
| | - Shengyong Xu
- Key Laboratory for the AGA & Chemistry of Nanodevices, Department of Electronics, Peking University Beijing 100871 P. R. China +86-10-62757261
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Schena E, Saccomandi P, Tosi D, Davrieux F, Gassino R, Massaroni C, Presti DL, Costamagna G, Perrone G, Vallan A, Diana M, Marescaux J. Solutions to Improve the Outcomes of Thermal Treatments in Oncology: Multipoint Temperature Monitoring. ACTA ACUST UNITED AC 2018. [DOI: 10.1109/jerm.2018.2838341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jermakowicz WJ, Cajigas I, Dan L, Guerra S, Sur S, D’Haese PF, Kanner AM, Jagid JR. Ablation dynamics during laser interstitial thermal therapy for mesiotemporal epilepsy. PLoS One 2018; 13:e0199190. [PMID: 29979717 PMCID: PMC6034782 DOI: 10.1371/journal.pone.0199190] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/02/2018] [Indexed: 11/18/2022] Open
Abstract
Introduction The recent emergence of laser interstitial thermal therapy (LITT) as a frontline surgical tool in the management of brain tumors and epilepsy is a result of advances in MRI thermal imaging. A limitation to further improving LITT is the diversity of brain tissue thermoablative properties, which hinders our ability to predict LITT treatment-related effects. Utilizing the mesiotemporal lobe as a consistent anatomic model system, the goal of this study was to use intraoperative thermal damage estimate (TDE) maps to study short- and long-term effects of LITT and to identify preoperative variables that could be helpful in predicting tissue responses to thermal energy. Methods For 30 patients with mesiotemporal epilepsy treated with LITT at a single institution, intraoperative TDE maps and pre-, intra- and post-operative MRIs were co-registered in a common reference space using a deformable atlas. The spatial overlap of TDE maps with manually-traced immediate (post-ablation) and delayed (6-month) ablation zones was measured using the dice similarity coefficient (DSC). Then, motivated by simple heat-transfer models, ablation dynamics were quantified at amygdala and hippocampal head from TDE pixel time series fit by first order linear dynamics, permitting analysis of the thermal time constant (τ). The relationships of these measures to 16 independent variables derived from patient demographics, mesiotemporal anatomy, preoperative imaging characteristics and the surgical procedure were examined. Results TDE maps closely overlapped immediate ablation borders but were significantly larger than the ablation cavities seen on delayed imaging, particularly at the amygdala and hippocampal head. The TDEs more accurately predicted delayed LITT effects in patients with smaller perihippocampal CSF spaces. Analyses of ablation dynamics from intraoperative TDE videos showed variable patterns of lesion progression after laser activation. Ablations tended to be slower for targets with increased preoperative T2 MRI signal and in close proximity to large, surrounding CSF spaces. In addition, greater laser energy was required to ablate mesial versus lateral mesiotemporal structures, an effect associated with laser trajectory and target contrast-enhanced T1 MRI signal. Conclusions Patient-specific variations in mesiotemporal anatomy and pathology may influence the thermal coagulation of these tissues. We speculate that by incorporating demographic and imaging data into predictive models we may eventually enhance the accuracy and precision with which LITT is delivered, improving outcomes and accelerating adoption of this novel tool.
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Affiliation(s)
- Walter J. Jermakowicz
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Iahn Cajigas
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Lia Dan
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Santiago Guerra
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Samir Sur
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Pierre-Francois D’Haese
- Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Andres M. Kanner
- Epilepsy Division, Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida, United States of America
| | - Jonathan R. Jagid
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, United States of America
- * E-mail:
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Feasibility of EUS-guided Nd:YAG laser ablation of unresectable pancreatic adenocarcinoma. Gastrointest Endosc 2018; 88:168-174.e1. [PMID: 29452076 DOI: 10.1016/j.gie.2018.02.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 02/01/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS EUS has become an interventional technique in which a needle may be used as a vehicle to deliver therapeutic agents. Laser ablation (LA) has been used to treat many primary and secondary neoplasms. This study aimed to assess the feasibility of EUS-guided LA for unresectable (UR) pancreatic cancer. METHODS Patients with stage IIb-III pancreatic cancer underwent EUS-guided LA. All patients were unresponsive to previous chemoradiotherapy. LA was performed by using a 300-μm flexible fiber preloaded onto a 22-gauge fine needle. A 1064-nm wavelength neodymium-yttrium aluminum garnet (Nd:YAG) laser light with different power settings of 2 W for 800 J, 1000 J, and 1200 J; 3 W for 800 J, 1000 J, and 1200 J; and 4 W for 800 J, 1000 J, and 1200 J was used. Each patient was treated with a single application of 1 of these settings. The application time of the power settings ranged from 200 to 600 seconds. RESULTS Nine patients (median age, 74.7; range 55-85) underwent Nd:Yag LA. The mean size of the focal lesion was 35.4 mm (range, 21-45). The ablation area, demonstrated by 24-hour CT, ranged from .4 cm3 (for the lower power setting of 2 W/800 J) to a maximum of 6.4 cm3 (for 4 W/1000 J). The procedure was completed in all 9 patients without adverse events. CONCLUSION In our human experience, EUS-guided LA was feasible and well tolerated in patients with UR pancreatic cancer.
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Cappelli S, Saccomandi P, Massaroni C, Polimadei A, Silvestri S, Caponero MA, Frauenfelder G, Schena E. Magnetic Resonance-compatible needle-like probe based on Bragg grating technology for measuring temperature during Laser Ablation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2015:1287-90. [PMID: 26736503 DOI: 10.1109/embc.2015.7318603] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Temperature monitoring in tissue undergone Laser Ablation (LA) may be particularly beneficial to optimize treatment outcome. Among many techniques, fiber Bragg grating (FBG) sensors show valuable characteristics for temperature monitoring in this medical scenario: good sensitivity and accuracy, and immunity from electromagnetic interferences. Their main drawback is the sensitivity to strain, which can entail measurement error for respiratory and patient movements. The aims of this work are the design, the manufacturing and the characterization of a needle-like probe which houses 4 FBGs. Three FBGs have sensitive length of 1 mm and are used as temperature sensors; one FBG with length of 10 mm is used as reference and to sense eventual strain. The optical fiber housing the FBGs was encapsulated within a needle routinely used in clinical practice to perform MRI-guided biopsy. Two materials were used for the encapsulation: i) thermal paste for the 3 FBGs used for temperature monitoring, to maximize the thermal exchange with the needle; ii) epoxy resin for the reference FBG, to improve its sensitivity to strain. The static calibration of the needle-like probe was performed to estimate the thermal sensitivity of each FBG; the step response was investigated to estimate the response time. FBGs 1 mm long have thermal sensitivity of 0.01 nm·°C(-1), whereas the reference FBG presents 0.02 nm·°C(-1). For all FBGs, the response time was in the order of 100 ms. Lastly, experiments were performed on ex vivo swine liver undergoing LA to i) evaluate the possible presence of measurement artifact, due to the direct absorption of laser light by the needle and ii) assess the feasibility of the probe in a quasi clinical scenario.
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Fornaini C, Merigo E, Poli F, Cavatorta C, Rocca JP, Selleri S, Cucinotta A. Use of 1070 nm fiber lasers in oral surgery: preliminary ex vivo study with FBG temperature monitoring. Laser Ther 2017; 26:311-318. [PMID: 29434432 PMCID: PMC5801457 DOI: 10.5978/islsm.17-or-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 09/12/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS The aim of this ex vivo study was to demonstrate the performances of 1070 nm fiber lasers for the ablation of oral tissues through the evaluation of the histological modifications made by a blind pathologist and the measurement of the thermal elevation during laser irradiation by a sensor based on a fiber Bragg grating. MATERIALS AND METHODS The source used was a pulsed fiber laser emitting at 1070 nm, with 20 W maximum average output power and 100 ns fixed pulse duration. Different tests were performed by changing the laser parameters, particularly the peak power of the pulses and the repetition rate. RESULTS The tissue of the measurements demonstrated that the best properties in term of cutting capability and, at the same time, the lower thermal damages to the tissues can be obtained with a peak power of 3 kW, a repetition rate of 50 kHz and a speed of 5 mm/s. CONCLUSIONS This ex vivo study showed that 1070 nm fiber lasers can be very useful in oral surgery, since they provide a reduced thermal elevation in the irradiated tissues, thus consequently respecting their biological structures. Moreover, this work demonstrates that FBG sensors, based on the optical fiber technology as the laser source considered for the tests, may be good instruments to record thermal elevation when applied to the ex vivo studies on animal models.
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Affiliation(s)
- Carlo Fornaini
- Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
- Micoralis Laboratory, Faculty of Dentistry, University of Cote d'Azur, 24 Avenue des Diables Bleus, 06357 Nice, France
| | - Elisabetta Merigo
- Micoralis Laboratory, Faculty of Dentistry, University of Cote d'Azur, 24 Avenue des Diables Bleus, 06357 Nice, France
| | - Federica Poli
- Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
| | - Chiara Cavatorta
- Section of Pathologic Anatomy, University Clinic Policlinico of Modena, Via del Pozzo 71 - 41124 Modena, Italy
| | - Jean-Paul Rocca
- Section of Pathologic Anatomy, University Clinic Policlinico of Modena, Via del Pozzo 71 - 41124 Modena, Italy
| | - Stefano Selleri
- Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
| | - Annamaria Cucinotta
- Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italy
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LI XIN, ZHONG YONGMIN, GU CHENGFAN. HEATING ANALYSIS OF SOFT TISSUE AT FINITE DEFORMATION DURING THERMAL ABLATION. J MECH MED BIOL 2017. [DOI: 10.1142/s0219519417400413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Heating analysis of soft tissue at finite deformation is of importance during treatment planning process for thermal ablation. This paper presents a method by combining non-Fourier bio-heat transfer and nonlinear biomaterial model to simulate thermal and mechanical responses of soft tissues under combined thermal and mechanical loads. At the same time, anisotropic feature of biological tissue is also concerned by including the stored energy of collagen fiber bundles into the traditional neo-Hookean free energy function. Simulation results demonstrate that in spite of relatively small thermal-induced displacement, the resultant thermal strain and stress contribution is nonnegligible and can be used as theoretical basis to measure tissue pain during thermal ablation process.
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Affiliation(s)
- XIN LI
- School of Engineering, RMIT University Bundoora, VIC 3083, Australia
| | - YONGMIN ZHONG
- School of Engineering, RMIT University Bundoora, VIC 3083, Australia
| | - CHENGFAN GU
- School of Engineering, RMIT University Bundoora, VIC 3083, Australia
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Saccomandi P, Di Matteo FM, Schena E, Quero G, Massaroni C, Giurazza F, Costamagna G, Silvestri S. Tapered fiber optic applicator for laser ablation: Theoretical and experimental assessment of thermal effects on ex vivo model. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2017:4529-4532. [PMID: 29060904 DOI: 10.1109/embc.2017.8037863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Laser Ablation (LA) is a minimally invasive technique for tumor removal. The laser light is guided into the target tissue by a fiber optic applicator; thus the physical features of the applicator tip strongly influence size and shape of the tissue lesion. This study aims to verify the geometry of the lesion achieved by a tapered-tip applicator, and to investigate the percentage of thermally damaged cells induced by the tapered-tip fiber optic applicator. A theoretical model was implemented to simulate: i) the distribution of laser light fluence rate in the tissue through Monte Carlo method, ii) the induced temperature distribution, by means of the Bio Heat Equation, iii) the tissue injury, by Arrhenius integral. The results obtained by the implementation of the theoretical model were experimentally assessed. Ex vivo porcine liver underwent LA with tapered-tip applicator, at different laser settings (laser power of 1 W and 1.7 W, deposited energy equal to 330 J and 500 J, respectively). Almost spherical volume lesions were produced. The thermal damage was assessed by measuring the diameter of the circular-shaped lesion. The comparison between experimental results and theoretical prediction shows that the thermal damage discriminated by visual inspection always corresponds to a percentage of damaged cells of 96%. A tapered-tip applicator allows obtaining localized and reproducible damage close to spherical shape, whose diameter is related to the laser settings, and the simple theoretical model described is suitable to predict the effects, in terms of thermal damage, on ex vivo liver. Further trials should be addressed to adapt the model also on in vivo tissue, aiming to develop a tool useful to support the physician in clinical application of LA.
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Saccomandi P, Quero G, Costamagna G, Diana M, Marescaux J. Effects of Nd:YAG laser for the controlled and localized treatment of early gastrointestinal tumors: Preliminary in vivo study. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2017:4533-4536. [PMID: 29060905 DOI: 10.1109/embc.2017.8037864] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Endoscopic submucosal dissection (ESD) is a minimally invasive technique allowing for the removal of early gastrointestinal (GI) tumors, widely considered as a valid alternative to conventional surgery. However, ESD is technically demanding, and potentially severe complications, such as bleeding and perforation, may occur. Energy-based techniques (e.g., radiofrequency ablation) might offer a potential alternative to ESD. However, their use mandates the ability to predict the damage induced and to identify a "signature" of the complete ablation, without the need for a physical specimen. Ideally, an energy-based procedure should be tunable in order to limit the ablation to the superficial layers, namely mucosa (M) and submucosa (SM), without injuring the muscularis propria (MP), thereby minimizing GI perforation. This experimental study aims to investigate thermal damage induced by Nd:YAG laser on the gastric wall, at different laser settings such as power (P) and time (t). Laser ablation was performed on the stomach wall of 6 Wistar rats. Two powers (2.5W and 1.0W) and 3 exposure times (12s, 6s and 2s) were tested, for a total of 30 ablations. Histological analysis allowed to assess thermal damage, in terms of damage depth (DD) and identification of involved layers. The ratio (R) between DD and the total depth (TD) of target layers (M+SM) was used as an index to evaluate the effectiveness of laser settings. At P=2.5W, MP was damaged (R>1) in the majority of cases (11/15). At P=1.0W, MP was preserved in all tests (R<;1), and rarely (4/15) did the damage reach the whole SM (R=1). Histopathological analysis evidenced that tissue damage was strongly related to the variable tissue thickness. These preliminary results seem to support the fact that endoscopic tunable laser ablation is feasible with a consistent damage/power correlation. Further tests are required to optimize the settings for applications on early GI tumors.
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Saccomandi P, Varalda A, Gassino R, Tosi D, Massaroni C, Caponero MA, Pop R, Korganbayev S, Perrone G, Diana M, Vallan A, Costamagna G, Marescaux J, Schena E. Linearly chirped fiber Bragg grating response to thermal gradient: from bench tests to the real-time assessment during in vivo laser ablations of biological tissue. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:1-9. [PMID: 28914008 DOI: 10.1117/1.jbo.22.9.097002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
The response of a fiber optic sensor [linearly chirped fiber Bragg grating (LCFBG)] to a linear thermal gradient applied on its sensing length (i.e., 1.5 cm) has been investigated. After these bench tests, we assessed their feasibility for temperature monitoring during thermal tumor treatment. In particular, we performed experiments during ex vivo laser ablation (LA) in pig liver and in vivo thermal ablation in animal models (pigs). We investigated the following: (i) the relationship between the full width at half maximum of the LCFBG spectrum and the temperature difference among the extremities of the LCFBG and (ii) the relationship between the mean spectrum wavelength and the mean temperature acting on the LCFBG sensing area. These relationships showed a linear trend during both bench tests and LA in animal models. Thermal sensitivity was significant although different values were found with regards to bench tests and animal experiments. The linear trend and significant sensitivity allow hypothesizing a future use of this kind of sensor to monitor both temperature gradient and mean temperature within a tissue undergoing thermal treatment.
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Affiliation(s)
- Paola Saccomandi
- IHU-Strasbourg - Institute of Image-Guided Surgery, Strasbourg, France
- Università Campus Bio-Medico di Roma, Unit of Measurements and Biomedical Instrumentation, Rome, Italy
| | - Ambra Varalda
- Università Campus Bio-Medico di Roma, Unit of Measurements and Biomedical Instrumentation, Rome, Italy
| | - Riccardo Gassino
- Politecnico di Torino, Department of Electronics and Telecommunications, Torino, Italy
| | - Daniele Tosi
- Nazarbayev University, School of Engineering, Astana, Kazakhstan
- Nazarbayev University, National Laboratory Astana, Biosensors and Bioinstrumentation Laboratory, Kazakhstan
| | - Carlo Massaroni
- Università Campus Bio-Medico di Roma, Unit of Measurements and Biomedical Instrumentation, Rome, Italy
| | - Michele A Caponero
- Research Centre of Frascati, Photonics Micro-and Nano-Structures Laboratory, Agenzia nazionale per l, Italy
| | - Raoul Pop
- CHRU-Centre Hospitalier Régional et Universitaire, Strasbourg, France
| | | | - Guido Perrone
- Politecnico di Torino, Department of Electronics and Telecommunications, Torino, Italy
| | - Michele Diana
- IHU-Strasbourg - Institute of Image-Guided Surgery, Strasbourg, France
- IRCAD-Research Institute against Cancer of Digestive System, Strasbourg, France
| | - Alberto Vallan
- Politecnico di Torino, Department of Electronics and Telecommunications, Torino, Italy
| | - Guido Costamagna
- IHU-Strasbourg - Institute of Image-Guided Surgery, Strasbourg, France
- Università Cattolica del Sacro Cuore, Digestive Endoscopy, Policlinico Gemelli, Rome, Italy
| | - Jacques Marescaux
- IHU-Strasbourg - Institute of Image-Guided Surgery, Strasbourg, France
- IRCAD-Research Institute against Cancer of Digestive System, Strasbourg, France
| | - Emiliano Schena
- Università Campus Bio-Medico di Roma, Unit of Measurements and Biomedical Instrumentation, Rome, Italy
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Saccomandi P, Schena E, Caponero MA, Gassino R, Hernandez J, Perrone G, Vallan A, Diana M, Costamagna G, Marescaux J. Novel carbon fiber probe for temperature monitoring during thermal therapies. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2017:873-876. [PMID: 29060011 DOI: 10.1109/embc.2017.8036963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Thermal treatments are a valid clinical option in the management of several solid tumors. The difficulties to perform an accurate prediction improve the selectivity of the treatment effects represent the main hurdles in the spread of these techniques. Among other solutions, thermometric techniques are gaining acceptance in monitoring the effects of thermal treatments because they provide a clear end-point to obtain the complete removal of cancer without damaging the surrounding healthy tissue. This paper proposes a custom needle-like probe made of carbon fibers to embed seven fiber Bragg grating (FBG) sensors. This tool aims at a multiple points monitoring the tissue temperature during the thermal procedures, streamlining the FBG sensors insertion within the organ. After the description of the probe manufacturing, we reported the calibration of the seven sensors embedded within the probe, their step response, and the feasibility assessment of the probe for temperature monitoring during laser ablation on animal model (both in vivo and ex vivo). Results show that the proposed probe is easily maneuverable by the clinician, the sensors have a linear response with the temperature and a short step response; moreover, the probe allows measuring the temperature in seven points of the tissue; finally, it can be used during CTand MR-guided procedures without causing any artifact to the images. Thanks to these features the probe may be an useful solution to improve the safety and the outcomes of minimally invasive thermal ablation procedures, so to spread these procedures in the clinical field.
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Laser Ablation for Cancer: Past, Present and Future. J Funct Biomater 2017; 8:jfb8020019. [PMID: 28613248 PMCID: PMC5492000 DOI: 10.3390/jfb8020019] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 05/30/2017] [Accepted: 06/13/2017] [Indexed: 12/27/2022] Open
Abstract
Laser ablation (LA) is gaining acceptance for the treatment of tumors as an alternative to surgical resection. This paper reviews the use of lasers for ablative and surgical applications. Also reviewed are solutions aimed at improving LA outcomes: hyperthermal treatment planning tools and thermometric techniques during LA, used to guide the surgeon in the choice and adjustment of the optimal laser settings, and the potential use of nanoparticles to allow biologic selectivity of ablative treatments. Promising technical solutions and a better knowledge of laser-tissue interaction should allow LA to be used in a safe and effective manner as a cancer treatment.
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Pham NT, Lee SL, Park S, Lee YW, Kang HW. Real-time temperature monitoring with fiber Bragg grating sensor during diffuser-assisted laser-induced interstitial thermotherapy. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:45008. [PMID: 28425558 DOI: 10.1117/1.jbo.22.4.045008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 03/28/2017] [Indexed: 05/25/2023]
Abstract
High-sensitivity temperature sensors have been used to validate real-time thermal responses in tissue during photothermal treatment. The objective of the current study was to evaluate the feasible application of a fiber Bragg grating (FBG) sensor for diffuser-assisted laser-induced interstitial thermotherapy (LITT) particularly to treat tubular tissue disease. A 600 - ? m core-diameter diffuser was employed to deliver 980-nm laser light for coagulation treatment. Both a thermocouple and a FBG were comparatively tested to evaluate temperature measurements in ex vivo liver tissue. The degree of tissue denaturation was estimated as a function of irradiation times and quantitatively compared with light distribution as well as temperature development. At the closer distance to a heat source, the thermocouple measured up to 41% higher maximum temperature than the FBG sensor did after 120-s irradiation (i.e., 98.7 ° C ± 6.1 ° C for FBG versus 131.0 ° C ± 5.1 ° C for thermocouple; p < 0.001 ). Ex vivo porcine urethra tests confirmed the real-time temperature measurements of the FBG sensor as well as consistently circumferential tissue denaturation after 72-s irradiation ( coagulation thickness = 2.2 ± 0.3 ?? mm ). The implementation of FBG can be a feasible sensing technique to instantaneously monitor the temperature developments during diffuser-assisted LITT for treatment of tubular tissue structure.
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Affiliation(s)
- Ngot Thi Pham
- Pukyong National University, Interdisciplinary Program of Marine-Bio, Electrical and Mechanical Engineering, Busan, Republic of Korea
| | - Seul Lee Lee
- Pukyong National University, Interdisciplinary Program of Marine-Bio, Electrical and Mechanical Engineering, Busan, Republic of Korea
| | - Suhyun Park
- Chung-Ang University, School of Electrical and Electronics Engineering, Seoul, Republic of Korea
| | - Yong Wook Lee
- Pukyong National University, School of Electrical Engineering, Busan, Republic of KoreadPukyong National University, Center for Marine-Integrated Biomedical Technology, Busan, Republic of Korea
| | - Hyun Wook Kang
- Pukyong National University, Center for Marine-Integrated Biomedical Technology, Busan, Republic of KoreaePukyong National University, Department of Biomedical Engineering, Busan, Republic of Korea
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