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Shen J, Zhao J, Zhong X, Xie S, Wu L, Hu C, Hu X, Shen H. Initial treatment for surgery-naïve desmoid tumors by high intensity focused ultrasound. Front Oncol 2024; 14:1388302. [PMID: 39104718 PMCID: PMC11298426 DOI: 10.3389/fonc.2024.1388302] [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: 02/19/2024] [Accepted: 07/08/2024] [Indexed: 08/07/2024] Open
Abstract
Introduction Desmoid tumor (DT) is a rare proliferative disease occurring in connective tissues, characterized by high infiltration and recurrence rates. While surgery remains the primary treatment, its recurrence risk is high, and some extra-abdominal desmoid tumors are inoperable due to their locations. Despite attempts with radiotherapy and systemic therapy, the efficacy remains limited. Methods We used low-power cumulative high-intensity focused ultrasound (HIFU) therapy as an initial treatment for desmoid tumor patients either ineligible or unwilling for surgery. Low-power cumulative HIFU employs slower heat accumulation and diffusion, minimizing damage to surrounding tissues while enhancing efficacy. Results Fifty-seven non-FAP desmoid tumor patients, previously untreated surgically, underwent low-power cumulative HIFU therapy. Among them, 35 had abdominal wall DT, 20 had extra-abdominal DT, and 2 had intra- abdominal DT, with an 85% median ablation ratio. Abdominal wall DT patients showed significantly better response rates (91.4% vs. 86%) and disease control rates (100% vs. 32%) than that of non-abdominal wall DT patients. Median event- free survival time was not reached after a median follow-up duration of 34 months. Discussion With its high response rate, durable efficacy, and mild adverse effects, our findings suggest that low-power cumulative HIFU presents a promising novel treatment for desmoid tumors, particularly abdominal wall DT patients.
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Affiliation(s)
- Jiayi Shen
- Department of Medical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Zhejiang University-University of Edinburgh (ZJU-UOE) Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang, China
| | - Jing Zhao
- Department of Medical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xian Zhong
- Department of Medical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Shuyi Xie
- Zhejiang University-University of Edinburgh (ZJU-UOE) Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang, China
| | - Lanqi Wu
- Zhejiang University-University of Edinburgh (ZJU-UOE) Institute, Zhejiang University School of Medicine, Zhejiang University, Haining, Zhejiang, China
| | - Chenlu Hu
- College of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Xiaoye Hu
- Department of Medical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hong Shen
- Department of Medical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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Yao R, Hu J, Zhao W, Cheng Y, Feng C. A review of high-intensity focused ultrasound as a novel and non-invasive interventional radiology technique. J Interv Med 2022; 5:127-132. [PMID: 36317144 PMCID: PMC9617156 DOI: 10.1016/j.jimed.2022.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 05/23/2022] [Accepted: 06/07/2022] [Indexed: 11/19/2022] Open
Abstract
High-intensity focused ultrasound (HIFU) is a non-invasive interventional radiology technology, which has been generally accepted in clinical practice for the treatment of benign and malignant tumors. HIFU can cause targeted tissue coagulative necrosis and protein denaturation by thermal or non-thermal effects, guided by diagnostic ultrasound or magnetic resonance imaging, without destruction of the normal adjacent tissue, under sedation or general anesthesia. HIFU has become an important alternative to standard treatments of solid tumors, including surgery, radiation, and medications. The aim of this review is to describe the development, principle, devices, and clinical applications of HIFU.
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Affiliation(s)
- Ruihong Yao
- Medical Imaging Department, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jihong Hu
- Medical Imaging Department, The First Affiliated Hospital of Kunming Medical University, Kunming, China
- Corresponding author.
| | - Wei Zhao
- Medical Imaging Department, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yongde Cheng
- Editorial Board of the Journal of Interventional Medicine, Shanghai, China
| | - Chaofan Feng
- Medical Imaging Department, The First Affiliated Hospital of Kunming Medical University, Kunming, China
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Recognition of Biological Tissue Denaturation Based on Improved Multiscale Permutation Entropy and GK Fuzzy Clustering. INFORMATION 2022. [DOI: 10.3390/info13030140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Recognition of biological tissue denaturation is a vital work in high-intensity focused ultrasound (HIFU) therapy. Multiscale permutation entropy (MPE) is a nonlinear signal processing method for feature extraction, widely applied to the recognition of biological tissue denaturation. However, the typical MPE cannot derive a stable entropy due to intensity information loss during the coarse-graining process. For this problem, an improved multiscale permutation entropy (IMPE) is proposed in this work. IMPE is obtained through refining and reconstructing MPE. Compared with MPE, the IMPE overcomes the deficiency of amplitude information loss due to the coarse-graining process when computing signal complexity. Through the simulation of calculating MPE and IMPE from white Gaussian noise, it is found that the entropy derived by IMPE is more stable than that derived by MPE. The processing method based on IMPE feature extraction is applied to the experimental ultrasonic scattered echo signals in HIFU treatment. Support vector machine and Gustafson–Kessel fuzzy clustering based on MPE and IMPE feature extraction are also used for biological tissue denaturation classification and recognition. The results calculated from the different combination algorithms show that the recognition of biological tissue denaturation based on IMPE-GK clustering is more reliable with the accuracy of 95.5%.
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Frutos Díaz-Alejo J, Gonzalez Gomez I, Earl J. Ultrasounds in cancer therapy: A summary of their use and unexplored potential. Oncol Rev 2022; 16:531. [PMID: 35340884 PMCID: PMC8941342 DOI: 10.4081/oncol.2022.531] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 09/17/2021] [Indexed: 11/26/2022] Open
Abstract
Ultrasounds (US) are a non-ionizing mechanical wave, with less adverse effects than conventional pharmacological or surgical treatments. Different biological effects are induced in tissues and cells by ultrasound actuation depending on acoustic parameters, such as the wave intensity, frequency and treatment dose. This non-ionizing radiation has considerable applications in biomedicine including surgery, medical imaging, physical therapy and cancer therapy. Depending on the wave intensity, US are applied as high-intensity ultrasounds (HIUS) and low-intensity pulsed ultrasounds (LIPUS), with different effects on cells and tissues. HIUS produce thermal and mechanical effects, resulting in a large localized temperature increase, leading to tissue ablation and even tumor necrosis. This can be achieved by focusing low intensity waves emitted from different electrically shifted transducers, known as high-intensity focused ultrasounds (HIFU). LIPUS have been used extensively as a therapeutic, surgical and diagnostic tool, with diverse biological effects observed in tissues and cultured cells. US represent a non-invasive treatment strategy that can be applied to selected areas of the body, with limited adverse effects. In fact, tumor ablation using HIFU has been used as a curative treatment in patients with an early-stage pancreatic tumor and is an effective palliative treatment in patients with advanced stage disease. However, the biological effects, dose standardization, benefit-risk ratio and safety are not fully understood. Thus, it is an emerging field that requires further research in order to reach its full potential.
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Liu B, Tan W, Zhang X, Peng Z, Cao J. Recognition study of denatured biological tissues based on multi-scale rescaled range permutation entropy. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2022; 19:102-114. [PMID: 34902982 DOI: 10.3934/mbe.2022005] [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] [Indexed: 06/14/2023]
Abstract
The recognition of denatured biological tissue is an indispensable part in the process of high intensity focused ultrasound treatment. As a nonlinear method, multi-scale permutation entropy (MPE) is widely used in the recognition of denatured biological tissue. However, the traditional MPE method neglects the amplitude information when calculating the time series complexity. The disadvantage will affect the recognition effect of denatured tissues. In order to solve the above problems, the method of multi-scale rescaled range permutation entropy (MRRPE) is proposed in this paper. The simulation results show that the MRRPE not only includes the amplitude information of the signal when calculating the signal complexity, but also extracts the extreme volatility characteristics of the signal effectively. The proposed method is applied to the HIFU echo signals during HIFU treatment, and the support vector machine (SVM) is used for recognition. The results show that compared with MPE and the multi-scale weighted permutation entropy (MWPE), the recognition rate of denatured biological tissue based on the MRRPE is higher, up to 96.57%, which can better recognize the non-denatured biological tissues and the denatured biological tissues.
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Affiliation(s)
- Bei Liu
- College of Mathematics and Physics, Hunan University of Arts and Science, Changde 415000, China
| | - Wenbin Tan
- College of Mathematics and Physics, Hunan University of Arts and Science, Changde 415000, China
| | - Xian Zhang
- Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment, Monitoring Ministry of Education, School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
| | - Ziqi Peng
- College of Mathematics and Physics, Hunan University of Arts and Science, Changde 415000, China
| | - Jing Cao
- College of Mathematics and Physics, Hunan University of Arts and Science, Changde 415000, China
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A Review of High-Intensity Focused Ultrasound in Urology. Cancers (Basel) 2021; 13:cancers13225696. [PMID: 34830852 PMCID: PMC8616438 DOI: 10.3390/cancers13225696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 01/20/2023] Open
Abstract
This review provides an introduction to high-intensity focused ultrasound (HIFU) and reviews its historical and current use in urological surgery. Current and historical literature (1927-2020), including that describing trials and review articles in the medical and ultrasonic literature, has been reviewed, using Pub Med and Cochrane search engines. HIFU is currently one of a number of treatments for prostate cancer, both as a primary treatment that can be repeated, and as a salvage treatment post-radiotherapy. HIFU is not yet sufficiently mature to be a standard treatment for renal cancer or other urological diseases, although there has been some success in early clinical trials. As the technology improves, this situation is likely to change. HIFU has been understood as a concept for a century, and has been applied in experimental use for half that time. It is now an accepted treatment with low morbidity in many diseases outside the scope of this review. In urological surgery, prostate HIFU is accepted as a localised treatment in selected cases, with potentially fewer side effects than other localised therapies. Currently the treatment for renal cancer is hindered by the perinephric fat and the position of the kidneys behind the ribs; however, as the technology improves with image fusion, faster treatments, and the ability with phased array transducers and motion compensation to overcome the problems caused by the ribs and breathing, successful treatment of kidney tumours will become more of a reality. In due course, there will be a new generation of machines for treating prostate cancer. These devices will further minimise the side effects of radical treatment of prostate cancer.
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Biological Tissue Damage Monitoring Method Based on IMWPE and PNN during HIFU Treatment. INFORMATION 2021. [DOI: 10.3390/info12100404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Biological tissue damage monitoring is an indispensable part of high-intensity focused ultrasound (HIFU) treatment. As a nonlinear method, multi-scale permutation entropy (MPE) is widely used in the monitoring of biological tissue. However, the traditional MPE method neglects the amplitude information when calculating the time series complexity, and the stability of MPE is poor due to the defects in the coarse-grained process. In order to solve the above problems, the method of improved coarse-grained multi-scale weighted permutation entropy (IMWPE) is proposed in this paper. Compared with the MPE, the IMWPE method not only includes the amplitude of signal when calculating the signal complexity, but also improves the stability of entropy value. The IMWPE method is applied to the HIFU echo signals during HIFU treatment, and the probabilistic neural network (PNN) is used for monitoring the biological tissue damage. The results show that compared with multi-scale sample entropy (MSE)-PNN and MPE-PNN methods, the proposed IMWPE-PNN method can correctly identify all the normal tissues, and can more effectively identify damaged tissues and denatured tissues. The recognition rate for the three kinds of biological tissues is higher, up to 96.7%. This means that the IMWPE-PNN method can better monitor the status of biological tissue damage during HIFU treatment.
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Prachee I, Wu F, Cranston D. Oxford's clinical experience in the development of high intensity focused ultrasound therapy. Int J Hyperthermia 2021; 38:81-88. [PMID: 34420448 DOI: 10.1080/02656736.2021.1899311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
High Intensity Focused Ultrasound (HIFU) capably bridges the disciplines of surgery, oncology and biomedical engineering science. It provides the precision associated with a surgical tool whilst remaining a truly non-invasive technique. Oxford has been a centre for both clinical and preclinical research in HIFU over the last twenty years. Research into this technology in the UK has a longer history, with much of the early research being carried out by Professor Gail ter Haar and her team at the Institute of Cancer Research at Sutton in Surrey. A broad range of potential applications have been explored extending from tissue ablation to novel drug delivery. This review presents Oxford's clinical studies and applications for the development of this non-invasive therapy. This includes treatment of solid abdominal tumours comprising those of the liver, kidney, uterus, pancreas, pelvis and prostate. It also briefly introduces preclinical and translational works that are currently being undertaken at the Institute of Biomedical Engineering, University of Oxford. The safety, wide tolerability and effectiveness of this technology is comprehensively demonstrated across these studies. These results can facilitate the incorporation of HIFU as a key clinical management strategy.
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Affiliation(s)
- Ishika Prachee
- Green Templeton College, University of Oxford, Oxford, UK.,Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Feng Wu
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK.,Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK.,State Key Laboratory of Ultrasound Engineering in Medicine, Chongqing, China
| | - David Cranston
- Green Templeton College, University of Oxford, Oxford, UK.,Oxford University Hospitals NHS Foundation Trust, Oxford, UK.,Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
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Zhao J, Shen H, Hu X, Wang Y, Yuan Y. The efficacy of a new high-intensity focused ultrasound therapy for metastatic pancreatic cancer. Int J Hyperthermia 2021; 38:288-295. [PMID: 33615955 DOI: 10.1080/02656736.2021.1876252] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
PURPOSE To compare the survival benefit, pain control and safety of low-power cumulative and traditional high-intensity focused ultrasound (HIFU) for metastatic pancreatic cancer. METHOD We retrospectively analyzed 55 patients with metastatic pancreatic cancer who received HIFU treatment between January 2008 and April 2014 in our department. 23 patients received low-power cumulative HIFU treatment (L group), 32 received the traditional HIFU treatment (T group). Performance status, cancer-related pain and serum biochemistry results were assessed before and after treatment. All patients were followed up until death. The survival rate and adverse events of the two groups were compared. RESULTS The baseline characteristics of the two groups were generally well balanced (p > 0.05). The average KPS score after treatment was significantly improved in both groups compared with the baseline score. 36 patients exhibited tumor-related pain at baseline. The pain response rate was significantly higher in the L group (92.3%) than in the T group (52.2%) (p = 0.025). The median overall survival (OS) for the L group was 7.0 months, which was significantly longer than that of the T group (p = 0.000). The 3-month and 6-month survival rates were higher in the L group. The adverse events in both groups included abdominal pain, elevated C-reactive protein (CRP) and elevated amylase. The incidence was lower in the L group than in the T group. CONCLUSION Compared with traditional HIFU treatment, low-power cumulative HIFU treatment showed a significantly higher pain relief rate and survival benefit with a better safety profile in patients with metastatic pancreatic cancer.
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Affiliation(s)
- Jing Zhao
- Department of Medical Oncology, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Hong Shen
- Department of Medical Oncology, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoye Hu
- Department of Medical Oncology, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, China
| | - Yuebing Wang
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, China
| | - Ying Yuan
- Department of Medical Oncology, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, China
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10
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High-intensity focused ultrasound alone or combined with transcatheter arterial chemoembolization for the treatment of hepatocellular carcinoma with unsuitable indications for hepatectomy and radiofrequency ablation: a phase II clinical trial. Surg Endosc 2021; 36:1857-1867. [PMID: 33788029 DOI: 10.1007/s00464-021-08465-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 03/18/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVES This study aims to evaluate the efficacy and safety of high-intensity focused ultrasound (HIFU) alone or combined with transcatheter arterial chemoembolization (TACE) for patients with hepatocellular carcinoma (HCC) but were contraindicated for hepatectomy and radiofrequency ablation (RFA). METHODS Patients between 20 and 80 years of age with 1-3 foci of HCC were selected. Included patients have had primary or recurrent liver lesions with no evidence of extra-hepatic metastasis prior to the study. Patients were treated with ultrasound-guided HIFU alone or HIFU combined with TACE (treated with TACE once within 4 weeks prior to receiving HIFU). RESULTS Thirty-seven patients were enrolled, for a total of 45 lesions. The 2-year local control (LC) rate was 73.0% and the median LC time was 22 months. The 2-year progression-free survival (PFS) was 29.7% and the median PFS time was 9 months. Finally, the 2-year overall survival (OS) was 70.3%, and the median OS time was 24 months. The most common adverse events (AEs) were elevated liver enzymes, followed by fatigue, and pain, no grade 4 AEs or death occurred. Multivariate analysis showed that age, Child-Pugh class, and the number of tumors were independent prognostic factors for PFS and that the AFP levels and the number of tumors were significantly correlated with the OS. CONCLUSIONS This study indicates that the HIFU/HIFU combined with TACE treatment is safe, and is capable of achieving both a good LC rate and a considerably good prognosis. The procedure should be considered for patients who were deemed unsuitable for other local treatments.
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Haqshenas SR, Gélat P, van 't Wout E, Betcke T, Saffari N. A fast full-wave solver for calculating ultrasound propagation in the body. ULTRASONICS 2021; 110:106240. [PMID: 32950757 DOI: 10.1016/j.ultras.2020.106240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/20/2020] [Accepted: 08/25/2020] [Indexed: 05/23/2023]
Abstract
Therapeutic ultrasound is a promising non-invasive method for inducing various beneficial biological effects in the human body. In cancer treatment applications, high-power ultrasound is focused at a target tissue volume to ablate the malignant tumour. The success of the procedure depends on the ability to accurately focus ultrasound and destroy the target tissue volume through coagulative necrosis whilst preserving the surrounding healthy tissue. Patient-specific treatment planning strategies are therefore being developed to increase the efficacy of such therapies, while reducing any damage to healthy tissue. These strategies require to use high-performance computing methods to solve ultrasound wave propagation in the body quickly and accurately. For realistic clinical scenarios, all numerical methods which employ volumetric meshes require several hours or days to solve the full-wave propagation on a computer cluster. The boundary element method (BEM) is an efficient approach for modelling the wave field because only the boundaries of the hard and soft tissue regions require discretisation. This paper presents a multiple-domain BEM formulation with a novel preconditioner for solving the Helmholtz transmission problem (HTP). This new formulation is efficient at high-frequencies and where high-contrast materials are present. Numerical experiments are performed to solve the HTP in multiple domains comprising: (i) human ribs, an idealised abdominal fat layer and liver tissue, (ii) a human kidney with a perinephric fat layer, exposed to the acoustic field generated by a high-intensity focused ultrasound (HIFU) array transducer. The time required to solve the equations associated with these problems on a single workstation is of the order of minutes. These results demonstrate the great potential of this new BEM formulation for accurately and quickly solving ultrasound wave propagation problems in large anatomical domains which is essential for developing treatment planning strategies.
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Affiliation(s)
- S R Haqshenas
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK; Department of Mathematics, University College London, London WC1H 0AY, UK.
| | - P Gélat
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK
| | - E van 't Wout
- Institute for Mathematical and Computational Engineering, School of Engineering and Faculty of Mathematics, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - T Betcke
- Department of Mathematics, University College London, London WC1H 0AY, UK
| | - N Saffari
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK
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Ji Y, Winter L, Navarro L, Ku MC, Periquito JS, Pham M, Hoffmann W, Theune LE, Calderón M, Niendorf T. Controlled Release of Therapeutics from Thermoresponsive Nanogels: A Thermal Magnetic Resonance Feasibility Study. Cancers (Basel) 2020; 12:cancers12061380. [PMID: 32471299 PMCID: PMC7352924 DOI: 10.3390/cancers12061380] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/23/2020] [Accepted: 05/25/2020] [Indexed: 12/16/2022] Open
Abstract
Thermal magnetic resonance (ThermalMR) accommodates radio frequency (RF)-induced temperature modulation, thermometry, anatomic and functional imaging, and (nano)molecular probing in an integrated RF applicator. This study examines the feasibility of ThermalMR for the controlled release of a model therapeutics from thermoresponsive nanogels using a 7.0-tesla whole-body MR scanner en route to local drug-delivery-based anticancer treatments. The capacity of ThermalMR is demonstrated in a model system involving the release of fluorescein-labeled bovine serum albumin (BSA-FITC, a model therapeutic) from nanometer-scale polymeric networks. These networks contain thermoresponsive polymers that bestow environmental responsiveness to physiologically relevant changes in temperature. The release profile obtained for the reference data derived from a water bath setup used for temperature stimulation is in accordance with the release kinetics deduced from the ThermalMR setup. In conclusion, ThermalMR adds a thermal intervention dimension to an MRI device and provides an ideal testbed for the study of the temperature-induced release of drugs, magnetic resonance (MR) probes, and other agents from thermoresponsive carriers. Integrating diagnostic imaging, temperature intervention, and temperature response control, ThermalMR is conceptually appealing for the study of the role of temperature in biology and disease and for the pursuit of personalized therapeutic drug delivery approaches for better patient care.
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Affiliation(s)
- Yiyi Ji
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany; (Y.J.); (M.-C.K.); (J.S.P.); (M.P.)
| | - Lukas Winter
- Physikalisch-Technische Bundesanstalt (PTB), 10587 Berlin, Germany; (L.W.); (W.H.)
| | - Lucila Navarro
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, 14195 Berlin, Germany; (L.N.); (L.E.T.); (M.C.)
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC), Universidad Nacional del Litoral (UNL)—Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santa Fe 3000, Argentina
| | - Min-Chi Ku
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany; (Y.J.); (M.-C.K.); (J.S.P.); (M.P.)
| | - João S. Periquito
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany; (Y.J.); (M.-C.K.); (J.S.P.); (M.P.)
| | - Michal Pham
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany; (Y.J.); (M.-C.K.); (J.S.P.); (M.P.)
| | - Werner Hoffmann
- Physikalisch-Technische Bundesanstalt (PTB), 10587 Berlin, Germany; (L.W.); (W.H.)
| | - Loryn E. Theune
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, 14195 Berlin, Germany; (L.N.); (L.E.T.); (M.C.)
| | - Marcelo Calderón
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, 14195 Berlin, Germany; (L.N.); (L.E.T.); (M.C.)
- POLYMAT and Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Thoralf Niendorf
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany; (Y.J.); (M.-C.K.); (J.S.P.); (M.P.)
- Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, 13125 Berlin, Germany
- Correspondence: ; Tel.: +49-30-9406-4505
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Yang T, Ng DM, Du N, He N, Dai X, Chen P, Wu F, Chen B, Fan X, Yan K, Zhou X, Dong M, Zheng Z, Gu L. HIFU for the treatment of difficult colorectal liver metastases with unsuitable indications for resection and radiofrequency ablation: a phase I clinical trial. Surg Endosc 2020; 35:2306-2315. [PMID: 32435962 DOI: 10.1007/s00464-020-07644-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 05/13/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The goal of this study is to evaluate the safety and efficacy of high intensity focused ultrasound (HIFU) for patients with colorectal liver metastases (CRLM) but were contraindicated for resection and radiofrequency ablation. METHODS Patients between 20 and 80 years of age with 1-3 liver metastases from colorectal cancer were selected. Included patients have had their primary lesions removed with no evidence of extrahepatic metastasis prior to the study. Ultrasound-guided HIFU was employed and target regions' ablation was achieved with repeated sonications from the deep to shallow regions of the tumors section by section. RESULTS Thirteen patients were enrolled. The most common adverse events (AEs) were pain (n = 8), followed by fatigue (n = 7), increased aspartate aminotransferase (AST) (n = 7), increased alanine aminotransferase (ALT) (n = 5), and skin edema (n = 4). No grade ≥ 3 AEs occurred and while most patients (76.9%) achieved a complete response, three patients achieved a partial response. The objective response rate was 100% after the first HIFU treatment. Nine patients relapsed but the tumors were mostly isolated to the liver (8/9). The median follow-up period was 25 months. The 2-year progression-free survival (PFS) was 16.7%, and the median PFS was 9 months. Notably, the 2-year overall survival (OS) was 77.8%, and the median OS was 25 months. CONCLUSION This study indicates that the HIFU treatment is safe, is able to achieve a good tumor response rate and long-term prognosis even when the foci were in high-risk locations, and should be considered for patients who were considered unsuitable for other local treatments.
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Affiliation(s)
- Tong Yang
- Department of Tumor HIFU Therapy, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
- Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China
| | | | - Nannan Du
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Ning He
- Department of Tumor HIFU Therapy, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Xiaoyu Dai
- Department of Anus and Intestine Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Ping Chen
- Department of General Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China
| | - Feng Wu
- Department of General Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China
| | - Bo Chen
- Department of Medical Image, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Xiaoxiang Fan
- Department of Interventional Therapy, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Kun Yan
- Department of Medical Image, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Xinfeng Zhou
- Department of General Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China
| | - Mingjun Dong
- Department of Anus and Intestine Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Zhi Zheng
- Department of Tumor HIFU Therapy, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang, China
| | - Lihu Gu
- Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China.
- Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China.
- Department of General Surgery, HwaMei Hospital, University of Chinese Academy of Sciences, Haishu District, Northwest Street 41, Ningbo, 315010, Zhejiang, China.
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14
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Duc NM, Keserci B. Emerging clinical applications of high-intensity focused ultrasound. ACTA ACUST UNITED AC 2020; 25:398-409. [PMID: 31287428 DOI: 10.5152/dir.2019.18556] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
High-intensity focused ultrasound (HIFU) is a minimally-invasive and non-ionizing promising technology and has been assessed for its role in the treatment of not only primary tumors but also metastatic lesions under the guidance of ultrasound or magnetic resonance imaging. Its performance is notably effective in neurologic, genitourinary, hepato-pancreato-biliary, musculoskeletal, oncologic, and other miscellaneous applications. In this article, we reviewed the emerging technology of HIFU and its clinical applications.
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Affiliation(s)
- Nguyen Minh Duc
- Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
| | - Bilgin Keserci
- Department of Radiology, Universiti Sains Malaysia School of Medical Sciences, Kelantan, Malaysia; Department of Radiology, Hospital Universiti Sains Malaysia, Kelantan, Malaysia
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15
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Jerusalem A, Al-Rekabi Z, Chen H, Ercole A, Malboubi M, Tamayo-Elizalde M, Verhagen L, Contera S. Electrophysiological-mechanical coupling in the neuronal membrane and its role in ultrasound neuromodulation and general anaesthesia. Acta Biomater 2019; 97:116-140. [PMID: 31357005 DOI: 10.1016/j.actbio.2019.07.041] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 01/23/2023]
Abstract
The current understanding of the role of the cell membrane is in a state of flux. Recent experiments show that conventional models, considering only electrophysiological properties of a passive membrane, are incomplete. The neuronal membrane is an active structure with mechanical properties that modulate electrophysiology. Protein transport, lipid bilayer phase, membrane pressure and stiffness can all influence membrane capacitance and action potential propagation. A mounting body of evidence indicates that neuronal mechanics and electrophysiology are coupled, and together shape the membrane potential in tight coordination with other physical properties. In this review, we summarise recent updates concerning electrophysiological-mechanical coupling in neuronal function. In particular, we aim at making the link with two relevant yet often disconnected fields with strong clinical potential: the use of mechanical vibrations-ultrasound-to alter the electrophysiogical state of neurons, e.g., in neuromodulation, and the theories attempting to explain the action of general anaesthetics. STATEMENT OF SIGNIFICANCE: General anaesthetics revolutionised medical practice; now an apparently unrelated technique, ultrasound neuromodulation-aimed at controlling neuronal activity by means of ultrasound-is poised to achieve a similar level of impact. While both technologies are known to alter the electrophysiology of neurons, the way they achieve it is still largely unknown. In this review, we argue that in order to explain their mechanisms/effects, the neuronal membrane must be considered as a coupled mechano-electrophysiological system that consists of multiple physical processes occurring concurrently and collaboratively, as opposed to sequentially and independently. In this framework the behaviour of the cell membrane is not the result of stereotypical mechanisms in isolation but instead emerges from the integrative behaviour of a complexly coupled multiphysics system.
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Affiliation(s)
- Antoine Jerusalem
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK.
| | - Zeinab Al-Rekabi
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - Haoyu Chen
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Ari Ercole
- Division of Anaesthesia, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0QQ, UK
| | - Majid Malboubi
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Miren Tamayo-Elizalde
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Lennart Verhagen
- Wellcome Centre for Integrative Neuroimaging (WIN), Department of Experimental Psychology, University of Oxford, Oxford OX1 3TA, UK; WIN, Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK
| | - Sonia Contera
- Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
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16
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Giles SL, Brown MRD, Rivens I, Deppe M, Huisman M, Kim YS, Farquhar-Smith P, Williams JE, Ter Haar GR, deSouza NM. Comparison of Imaging Changes and Pain Responses in Patients with Intra- or Extraosseous Bone Metastases Treated Palliatively with Magnetic Resonance-Guided High-Intensity-Focused Ultrasound. J Vasc Interv Radiol 2019; 30:1351-1360.e1. [PMID: 31101417 PMCID: PMC6715806 DOI: 10.1016/j.jvir.2019.02.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 02/07/2019] [Accepted: 02/21/2019] [Indexed: 12/21/2022] Open
Abstract
PURPOSE This study compared changes in imaging and in pain relief between patients with intraosseous, as opposed to extraosseous bone metastases. Both groups were treated palliatively with magnetic resonance-guided high-intensity-focused ultrasound (MRgHIFU). MATERIALS AND METHODS A total of 21 patients were treated prospectively with MRgHIFU at 3 centers. Intraprocedural thermal changes measured using proton resonance frequency shift (PRFS) thermometry and gadolinium-enhanced T1-weighted (Gd-T1W) image appearances after treatment were compared for intra- and extraosseous metastases. Pain scores and use of analgesic therapy documented before and up to 90 days after treatment were used to classify responses and were compared between the intra- and extraosseous groups. Gd-T1W changes were compared between responders and nonresponders in each group. RESULTS Thermal dose volumes were significantly larger in the extraosseous group (P = 0.039). Tumor diameter did not change after treatment in either group. At day 30, Gd-T1W images showed focal nonenhancement in 7 of 9 patients with intraosseous tumors; in patients with extraosseous tumors, changes were heterogeneous. Cohort reductions in worst-pain scores were seen for both groups, but differences from baseline at days 14, 30, 60, and 90 were only significant for the intraosseous group (P = 0.027, P = 0.013, P = 0.012, and P = 0.027, respectively). By day 30, 67% of patients (6 of 9) with intraosseous tumors were classified as responders, and the rate was 33% (4 of 12) for patients with extraosseous tumors. In neither group was pain response indicated by nonenhancement on Gd-T1W. CONCLUSIONS Intraosseous tumors showed focal nonenhancement by day 30, and patients had better pain response to MRgHIFU than those with extraosseous tumors. In this small cohort, post-treatment imaging was not informative of treatment efficacy.
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Affiliation(s)
- Sharon L Giles
- Cancer Research UK Cancer Imaging Centre, Magnetic Resonance Imaging Unit, The Royal Marsden Hospital, Sutton, Surrey SM2 5PT, United Kingdom.
| | - Matthew R D Brown
- Pain Medicine Department, The Royal Marsden Hospital, Sutton, Surrey SM2 5PT, United Kingdom; Targeted Approaches to Cancer Pain, The Institute of Cancer Research, London, United Kingdom
| | - Ian Rivens
- Therapeutic Ultrasound, The Institute of Cancer Research, London, United Kingdom
| | | | - Merel Huisman
- Image Sciences Institute/Imaging Division, University Medical Center Utrecht, The Netherlands
| | - Young-Sun Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Seoul, Korea; Department of Radiology, Mint Hospital, Seoul, Korea
| | - Paul Farquhar-Smith
- Pain Medicine Department, The Royal Marsden Hospital, Sutton, Surrey SM2 5PT, United Kingdom
| | - John E Williams
- Pain Medicine Department, The Royal Marsden Hospital, Sutton, Surrey SM2 5PT, United Kingdom
| | - Gail R Ter Haar
- Therapeutic Ultrasound, The Institute of Cancer Research, London, United Kingdom
| | - Nandita M deSouza
- Cancer Research UK Cancer Imaging Centre, Magnetic Resonance Imaging Unit, The Royal Marsden Hospital, Sutton, Surrey SM2 5PT, United Kingdom
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Liu B, Qian S, Hu W. Identification of Denatured Biological Tissues Based on Time-Frequency Entropy and Refined Composite Multi-Scale Weighted Permutation Entropy during HIFU Treatment. ENTROPY (BASEL, SWITZERLAND) 2019; 21:e21070666. [PMID: 33267380 PMCID: PMC7515163 DOI: 10.3390/e21070666] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 05/14/2023]
Abstract
Identification of denatured biological tissue is crucial to high intensity focused ultrasound (HIFU) treatment. It is not easy for intercepting ultrasonic scattered echo signals from HIFU treatment region. Therefore, this paper employed time-frequency entropy based on generalized S-transform (GST) to intercept ultrasonic echo signals. First, the time-frequency spectra of ultrasonic echo signal is obtained by GST, which is concentrated around the real instantaneous frequency of the signal. Then the time-frequency entropy is calculated based on time-frequency spectra. The experimental results indicate that the time-frequency entropy of ultrasonic echo signal will be abnormally high when ultrasonic signal travels across the boundary between normal region and treatment region in tissues. Ultrasonic scattered echo signals from treatment region can be intercepted by time-frequency entropy. In addition, the refined composite multi-scale weighted permutation entropy (RCMWPE) is proposed to evaluate the complexity of nonlinear time series. Comparing with multi-scale permutation entropy (MPE) and multi-scale weighted permutation entropy (MWPE), RCMWPE not only measures complexity of signal including amplitude information, but also improves the stability and reliability of multi-scale entropy. The RCMWPE and MPE are applied to 300 cases of actual ultrasonic scattered echo signals (including 150 cases in normal status and 150 cases in denatured status). It is found that the RCMWPE and MPE values of denatured tissues are higher than those of the normal tissues. Both RCMWPE and MPE can be used to distinguish normal tissues and denatured tissues. However, there are fewer feature points in the overlap region between RCMWPE of denatured tissues and normal tissues compared with MPE. The intra-class distance and the inter-class distance of RCMWPE are less and greater respectively than MPE. The difference between denatured tissues and normal tissues is more obvious when RCMWPE is used as the characteristic parameter. The results of this study will be helpful to guide doctors to obtain more accurate assessment of treatment effect during HIFU treatment.
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Chitnis PV, Farny CH, Roy RA. SVD-Based Separation of Stable and Inertial Cavitation Signals Applied to Passive Cavitation Mapping During HIFU. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2019; 66:857-866. [PMID: 30762545 DOI: 10.1109/tuffc.2019.2898917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Detection of inertial and stable cavitation is important for guiding high-intensity focused ultrasound (HIFU). Acoustic transducers can passively detect broadband noise from inertial cavitation and the scattering of HIFU harmonics from stable cavitation bubbles. Conventional approaches to cavitation noise diagnostics typically involve computing the Fourier transform of the time-domain noise signal, applying a custom comb filter to isolate the frequency components of interest, followed by an inverse Fourier transform. We present an alternative technique based on singular value decomposition (SVD) that efficiently separates the broadband emissions and HIFU harmonics. Spatiotemporally resolved cavitation detection was achieved using a 128-element, 5-MHz linear-array ultrasound imaging system operating in the receive mode at 15 frames/s. A 1.1-MHz transducer delivered HIFU to tissue-mimicking phantoms and excised liver tissue for a duration of 5 s. Beamformed radio frequency signals corresponding to each scan line in a frame were assembled into a matrix, and SVD was performed. Spectra of the singular vectors obtained from a tissue-mimicking gel phantom were analyzed by computing the peak ratio ( R ), defined as the ratio of the peak of its fifth-order polynomial fit and the maximum spectral peak. Singular vectors that produced an were classified as those representing stable cavitation, i.e., predominantly containing harmonics of HIFU. The projection of data onto this singular base reproduced stable cavitation signals. Similarly, singular vectors that produced an were classified as those predominantly containing broadband noise associated with inertial cavitation. These singular vectors were used to isolate the inertial cavitation signal. The R -value thresholds determined using gel data were then employed to analyze cavitation data obtained from bovine liver ex vivo. The SVD-based method faithfully reproduced the structural details in the spatiotemporal cavitation maps produced using the more cumbersome comb-filter approach with a maximum root-mean-squared error of 10%.
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19
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The Influence of Dynamic Tissue Properties on HIFU Hyperthermia: A Numerical Simulation Study. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Accurate temperature and thermal dose prediction are crucial to high-intensity focused ultrasound (HIFU) hyperthermia, which has been used successfully for the non-invasive treatment of solid tumors. For the conventional method of prediction, the tissue properties are usually set as constants. However, the temperature rise induced by HIFU irradiation in tissues will cause changes in the tissue properties that in turn affect the acoustic and temperature field. Herein, an acoustic–thermal coupling model is presented to predict the temperature and thermal damage zone in tissue in terms of the Westervelt equation and Pennes bioheat transfer equation, and the individual influence of each dynamic tissue property and the joint effect of all of the dynamic tissue properties are studied. The simulation results show that the dynamic acoustic absorption coefficient has the greatest influence on the temperature and thermal damage zone among all of the individual dynamic tissue properties. In addition, compared with the conventional method, the dynamic acoustic absorption coefficient leads to a higher focal temperature and a larger thermal damage zone; on the contrary, the dynamic blood perfusion leads to a lower focal temperature and a smaller thermal damage zone. Moreover, the conventional method underestimates the focal temperature and the thermal damage zone, compared with the simulation that was performed using all of the dynamic tissue properties. The results of this study will be helpful to guide the doctors to develop more accurate clinical protocols for HIFU treatment planning.
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20
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Nomoto T, Nishiyama N. Design of drug delivery systems for physical energy-induced chemical surgery. Biomaterials 2018; 178:583-596. [DOI: 10.1016/j.biomaterials.2018.03.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/17/2018] [Accepted: 03/22/2018] [Indexed: 01/03/2023]
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21
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Ma X, Huang B, Wang G, Fu X, Qiu S. Numerical simulation of the red blood cell aggregation and deformation behaviors in ultrasonic field. ULTRASONICS SONOCHEMISTRY 2017; 38:604-613. [PMID: 27590752 DOI: 10.1016/j.ultsonch.2016.08.021] [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: 05/10/2016] [Revised: 08/05/2016] [Accepted: 08/15/2016] [Indexed: 06/06/2023]
Abstract
The objective of this paper is to propose an immersed boundary lattice Boltzmann method (IB-LBM) considering the ultrasonic effect to simulate red blood cell (RBC) aggregation and deformation in ultrasonic field. Numerical examples involving the typical streamline, normalized out-of-plane vorticity contours and vector fields in pure plasma under three different ultrasound intensities are presented. Meanwhile, the corresponding transient aggregation behavior of RBCs, with special emphasis on the detailed process of RBC deformation, is shown. The numerical results reveal that the ultrasound wave acted on the pure plasma can lead to recirculation flow, which contributes to the RBCs aggregation and deformation in microvessel. Furthermore, increasing the intensity of the ultrasound wave can significantly enhance the aggregation and deformation of the RBCs. And the formation of the RBCs aggregation leads to the fluctuated and dropped vorticity value of plasma in return.
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Affiliation(s)
- Xiaojian Ma
- School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Biao Huang
- School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China.
| | - Guoyu Wang
- School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xiaoying Fu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
| | - Sicong Qiu
- School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China
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22
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Allasia M, Soria F, Battaglia A, Gazzera C, Calandri M, Caprino MP, Lucatello B, Velrti A, Maccario M, Pasini B, Bosio A, Gontero P, Destefanis P. Radiofrequency Ablation for Renal Cancer in Von Hippel-Lindau Syndrome Patients: A Prospective Cohort Analysis. Clin Genitourin Cancer 2017; 16:S1558-7673(17)30237-9. [PMID: 28866246 DOI: 10.1016/j.clgc.2017.07.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 07/27/2017] [Accepted: 07/31/2017] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Management of renal-cell carcinoma (RCC) in patients with Von Hippel-Lindau syndrome (VHL) represents a clinical dilemma: the oncologic outcomes must be weighed against preservation of renal function. Radiofrequency ablation (RFA) is currently used in selected cases for treatment of small-size RCC. The aim of this study was to evaluate the safety, complications, and functional and oncologic outcomes of RFA in the treatment of RCC in VHL patients. PATIENTS AND METHODS RCCs were treated with ultrasound-guided RFA or with laparoscopic RFA. Clinical and radiologic response, disease recurrence, and survival outcomes were evaluated during follow-up. Early and late complications were recorded and graded. RESULTS Nine RCC patients underwent RFA. The median number of RCCs per patient was 3 (interquartile range, 2-4). Among these 9 patients, a total of 20 RCCs were treated by RFA (19 ultrasound-guided RFA and 1 laparoscopic procedure). Median RCC size was 2.5 cm (interquartile range, 2.0-3.0). RFA did not impair renal function (P = .35). In 2 cases disease persisted, and in 1 case disease recurred after 18 months. These patients were retreated with ultrasound-guided RFA with complete response and no renal function impairment. RFA treatment was overall well tolerated and safe. No complications were recorded. Postoperative stay was no longer than 1 day. CONCLUSION RCC occurred in about two-thirds of VHL patients, who had young age at presentation; it was frequently multifocal and recurrent. The use of RFA, with extended indications, could represent a tailored treatment for VHL patients, reducing the risk of renal failure and resulting in satisfying oncologic results.
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Affiliation(s)
- Marco Allasia
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy.
| | - Francesco Soria
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Antonino Battaglia
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Carlo Gazzera
- Department of Interventional Radiology and Diagnostic Imaging, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Marco Calandri
- Department of Interventional Radiology and Diagnostic Imaging, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Mirko Parasiliti Caprino
- Division of Endocrinology, Diabetology, and Metabolism, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Barbara Lucatello
- Division of Endocrinology, Diabetology, and Metabolism, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Andrea Velrti
- Department of Diagnostic Imaging, San Luigi Gonzaga University Hospital, Orbassano, Torino, Italy
| | - Mario Maccario
- Division of Endocrinology, Diabetology, and Metabolism, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Barbara Pasini
- Department of Preventive and Predictive Medicine, Unit of Medical Genetics, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Andrea Bosio
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Paolo Gontero
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
| | - Paolo Destefanis
- Division of Urology, Department of Surgical Science, A. O. Città della Salute e Della Scienza di Torino-presidio Molinette, University of Turin, Turin, Italy
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Tognarelli S, Ciuti G, Diodato A, Cafarelli A, Menciassi A. Robotic Platform for High-Intensity Focused Ultrasound Surgery Under Ultrasound Tracking: The FUTURA Platform. ACTA ACUST UNITED AC 2017. [DOI: 10.1142/s2424905x17400104] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Focused Ultrasound Therapy Using Robotic Approaches (FUTURA) is a European seventh research framework programme project aimed at creating an innovative platform for Focused Ultrasound Surgery (FUS). Merging robotics together with noninvasive ultrasound monitoring and therapy has the goal to improve flexibility, precision and accuracy of the intervention, thus enabling a large use of FUS for the treatment of different pathologies. The FUTURA platform, based on FUS therapy under US tracking, has been set up with the first clinical target of kidney cancer treatment. Experiments for assessing the accuracy of the FUS delivery with the FUTURA platform have been carried out under in vitro static conditions and presented here as preliminary outcomes of this study.
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Affiliation(s)
- Selene Tognarelli
- The BioRobotics Institute, Scuola Superiore Sant’Anna (SSSA), Pontedera (PI), Italy
| | - Gastone Ciuti
- The BioRobotics Institute, Scuola Superiore Sant’Anna (SSSA), Pontedera (PI), Italy
| | - Alessandro Diodato
- The BioRobotics Institute, Scuola Superiore Sant’Anna (SSSA), Pontedera (PI), Italy
| | - Andrea Cafarelli
- The BioRobotics Institute, Scuola Superiore Sant’Anna (SSSA), Pontedera (PI), Italy
| | - Arianna Menciassi
- The BioRobotics Institute, Scuola Superiore Sant’Anna (SSSA), Pontedera (PI), Italy
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Memoli G, Caleap M, Asakawa M, Sahoo DR, Drinkwater BW, Subramanian S. Metamaterial bricks and quantization of meta-surfaces. Nat Commun 2017; 8:14608. [PMID: 28240283 PMCID: PMC5333366 DOI: 10.1038/ncomms14608] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 01/13/2017] [Indexed: 01/23/2023] Open
Abstract
Controlling acoustic fields is crucial in diverse applications such as loudspeaker design, ultrasound imaging and therapy or acoustic particle manipulation. The current approaches use fixed lenses or expensive phased arrays. Here, using a process of analogue-to-digital conversion and wavelet decomposition, we develop the notion of quantal meta-surfaces. The quanta here are small, pre-manufactured three-dimensional units-which we call metamaterial bricks-each encoding a specific phase delay. These bricks can be assembled into meta-surfaces to generate any diffraction-limited acoustic field. We apply this methodology to show experimental examples of acoustic focusing, steering and, after stacking single meta-surfaces into layers, the more complex field of an acoustic tractor beam. We demonstrate experimentally single-sided air-borne acoustic levitation using meta-layers at various bit-rates: from a 4-bit uniform to 3-bit non-uniform quantization in phase. This powerful methodology dramatically simplifies the design of acoustic devices and provides a key-step towards realizing spatial sound modulators.
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Affiliation(s)
- Gianluca Memoli
- INTERACT Lab, School of Engineering and Informatics, University of Sussex, Brighton BN1 9RH, UK
| | - Mihai Caleap
- Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK
| | - Michihiro Asakawa
- INTERACT Lab, School of Engineering and Informatics, University of Sussex, Brighton BN1 9RH, UK
| | - Deepak R. Sahoo
- INTERACT Lab, School of Engineering and Informatics, University of Sussex, Brighton BN1 9RH, UK
| | - Bruce W. Drinkwater
- Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK
| | - Sriram Subramanian
- INTERACT Lab, School of Engineering and Informatics, University of Sussex, Brighton BN1 9RH, UK
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Rosnitskiy PB, Yuldashev PV, Sapozhnikov OA, Maxwell AD, Kreider W, Bailey MR, Khokhlova VA. Design of HIFU Transducers for Generating Specified Nonlinear Ultrasound Fields. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2017; 64:374-390. [PMID: 27775904 PMCID: PMC5300962 DOI: 10.1109/tuffc.2016.2619913] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Various clinical applications of high-intensity focused ultrasound have different requirements for the pressure levels and degree of nonlinear waveform distortion at the focus. The goal of this paper is to determine transducer design parameters that produce either a specified shock amplitude in the focal waveform or specified peak pressures while still maintaining quasi-linear conditions at the focus. Multiparametric nonlinear modeling based on the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation with an equivalent source boundary condition was employed. Peak pressures, shock amplitudes at the focus, and corresponding source outputs were determined for different transducer geometries and levels of nonlinear distortion. The results are presented in terms of the parameters of an equivalent single-element spherically shaped transducer. The accuracy of the method and its applicability to cases of strongly focused transducers were validated by comparing the KZK modeling data with measurements and nonlinear full diffraction simulations for a single-element source and arrays with 7 and 256 elements. The results provide look-up data for evaluating nonlinear distortions at the focus of existing therapeutic systems as well as for guiding the design of new transducers that generate specified nonlinear fields.
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Guo Y, Zhao Y, Wang T, Zhao S, Qiu H, Han M, Wang X. Honokiol nanoparticles stabilized by oligoethylene glycols codendrimer: in vitro and in vivo investigations. J Mater Chem B 2017; 5:697-706. [DOI: 10.1039/c6tb02416e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Based on fluorescently labeled codendrimer PGC, honokiol nanoparticles were prepared, which possessed higher drug-loading content and enhanced antitumor efficacy in vitro and in vivo.
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Affiliation(s)
- Yifei Guo
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Yanna Zhao
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Ting Wang
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Shuang Zhao
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Hanhong Qiu
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Meihua Han
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
| | - Xiangtao Wang
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- China
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Gillies MJ, Lyon PC, Wu F, Leslie T, Chung DY, Gleeson F, Cranston D, Bojanic S. High-intensity focused ultrasonic ablation of sacral chordoma is feasible: a series of four cases and details of a national clinical trial. Br J Neurosurg 2016; 31:446-451. [PMID: 27936948 DOI: 10.1080/02688697.2016.1267330] [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] [Indexed: 10/20/2022]
Abstract
High-intensity focused ultrasound describes the use of high-intensity focused ultrasound (HIFU) to ablate tumours without requiring an incision or other invasive procedure. This technique has been trialled on a range of tumours including uterine fibroids, prostate, liver and renal cancer. We describe our experience of using HIFU to ablate sacral chordoma in four patients with advanced tumours. Patients were treated under general anaesthetic or sedation using an ultrasound-guided HIFU device. HIFU therapy was associated with a reduction in tumour volume over time in three patients for whom follow up scans were available. Tumour necrosis was reliably demonstrated in two of the three patients. We have established a national trial to assess if HIFU may improve long-term outcome from sacral chordoma, details are given.
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Affiliation(s)
- Martin J Gillies
- a Department of Neurosurgery , West Wing, John Radcliffe Hospital , Oxford , UK.,b Nuffield Department of Surgical Sciences , University of Oxford , Oxford , UK
| | - Paul C Lyon
- b Nuffield Department of Surgical Sciences , University of Oxford , Oxford , UK
| | - Feng Wu
- b Nuffield Department of Surgical Sciences , University of Oxford , Oxford , UK.,c HIFU Unit , Churchill Hospital , Headington, Oxford , UK
| | - Tom Leslie
- b Nuffield Department of Surgical Sciences , University of Oxford , Oxford , UK
| | - Daniel Y Chung
- d Department of Radiology , Churchill Hospital , Oxford , UK
| | - Fergus Gleeson
- d Department of Radiology , Churchill Hospital , Oxford , UK
| | - David Cranston
- b Nuffield Department of Surgical Sciences , University of Oxford , Oxford , UK.,c HIFU Unit , Churchill Hospital , Headington, Oxford , UK
| | - Stana Bojanic
- a Department of Neurosurgery , West Wing, John Radcliffe Hospital , Oxford , UK
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