1
|
Peña K, Ishahak M, Arechavala S, Leveillee RJ, Salas N. Comparison of temperature change and resulting ablation size induced by a 902–928 MHz and a 2450 MHz microwave ablation system in in-vivo porcine kidneys. Int J Hyperthermia 2019; 36:313-321. [DOI: 10.1080/02656736.2019.1565788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Karli Peña
- Joint Bioengineering and Endourology Developmental Surgical Laboratory, Division of Endourology, Laparoscopy, and Minimally-Invasive Surgery, Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
| | - Matthew Ishahak
- Joint Bioengineering and Endourology Developmental Surgical Laboratory, Division of Endourology, Laparoscopy, and Minimally-Invasive Surgery, Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
| | - Stacie Arechavala
- Joint Bioengineering and Endourology Developmental Surgical Laboratory, Division of Endourology, Laparoscopy, and Minimally-Invasive Surgery, Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
| | - Raymond J. Leveillee
- Joint Bioengineering and Endourology Developmental Surgical Laboratory, Division of Endourology, Laparoscopy, and Minimally-Invasive Surgery, Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
- Division of Urology, Department of Surgery, Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL, USA
| | - Nelson Salas
- Joint Bioengineering and Endourology Developmental Surgical Laboratory, Division of Endourology, Laparoscopy, and Minimally-Invasive Surgery, Department of Urology, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, USA
- Department of Vascular and Interventional Radiology, University of Miami Miller School of Medicine, Miami, FL, USA
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Laser interstitial thermotherapy application for breast surgery: Current situation and new trends. Breast 2017; 33:145-152. [PMID: 28395232 DOI: 10.1016/j.breast.2017.03.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 03/24/2017] [Accepted: 03/29/2017] [Indexed: 11/22/2022] Open
Abstract
While breast specialists debate on therapeutic de-escalation in breast cancer, the treatment of benign lesions is also discussed in relation to new percutaneous ablation techniques. The purpose of these innovations is to minimize potential morbidity. Laser Interstitial ThermoTherapy (LITT) is an option for the ablation of targeted nodules. This review evaluated the scientific publications investigating the LITT approach in malignant and benign breast disease. Three preclinical studies and eight clinical studies (2 studies including fibroadenomas and 6 studies including breast cancers) were reviewed. Although the feasibility and safety of LITT have been confirmed in a phase I trial, heterogeneous inclusion criteria and methods seem to be the main reason for LITT not being yet an extensively used treatment option. In conclusion, further development is necessary before this technique can be used in daily practice.
Collapse
|
4
|
Saccomandi P, Lupi G, Schena E, Polimadei A, Caponero M, Panzera F, Martino M, Di Matteo FM, Sciuto S, Silvestri S. Influence of FBG sensors length on temperature measures in laser-irradiated pancreas: theoretical and experimental evaluation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2013:3737-40. [PMID: 24110543 DOI: 10.1109/embc.2013.6610356] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Temperature distribution T(x,y,z,t) in tissue undergoing Laser-induced Interstitial Thermotherapy (LITT) plays a crucial role on treatment outcome. Theoretical and experimental assessment of temperature on ex vivo laser-irradiated pancreas is presented. The aim of this work is to assess the influence of thermometers dimensions on temperature measures during LITT. T(x,y,z,t) inside tissue is monitored by optical sensors, i.e., Fiber Bragg Gratings (FBGs): three FBGs with lengths of 10 mm and nine FBGs of 1 mm, at different distances (2 mm, 5 mm and 10 mm) and different quotes (0 mm, 2 mm and 4 mm) from the laser fiber tip are used. Theoretical punctual T(x,y,z,t) is averaged out on both 10 mm and 1 mm in order to compare numerical predictions with experimental data. Results demonstrate the influence of FBG length on T(x,y,z,t) measures. This phenomenon depends on the distance between sensor and applicator: it is particularly significant close to the applicator tip (2 mm) because of the high spatial T(x,y,z,t) gradient within the tissue. Both theoretical results and experimental ones show that just at a distance of 10 mm from the tip, differences between T(x,y,z,t) provided by FBGs of 10 mm and 1 mm are negligible.
Collapse
|
5
|
Salas N, Castle SM, Leveillee RJ. Radiofrequency ablation for treatment of renal tumors: technological principles and outcomes. Expert Rev Med Devices 2014; 8:695-707. [DOI: 10.1586/erd.11.51] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
6
|
Saccomandi P, Schena E, Silvestri S. Techniques for temperature monitoring during laser-induced thermotherapy: an overview. Int J Hyperthermia 2013; 29:609-19. [PMID: 24032415 DOI: 10.3109/02656736.2013.832411] [Citation(s) in RCA: 164] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Laser-induced thermotherapy (LITT) is a hyperthermic procedure recently employed to treat cancer in several organs. The amount of coagulated tissue depends on the temperature distribution around the applicator, which plays a crucial role for an optimal outcome: the removal of the whole neoplastic tissue, whilst preventing damage to the surrounding healthy tissue. Although feedback concerning tissue temperature could be useful to drive the physician in the adjustment of laser settings and treatment duration, LITT is usually performed without real-time monitoring of tissue temperature. During recent decades, many thermometric techniques have been developed to be used during thermal therapies. This paper provides an overview of techniques and sensors employed for temperature measurement during tissue hyperthermia, focusing on LITT, and an investigation of their performances in this application. The paper focuses on the most promising and widespread temperature monitoring techniques, splitting them into two groups: the former includes invasive techniques based on the use of thermocouples and fibre-optic sensors; the second analyses non-invasive methods, i.e. magnetic resonance imaging-, computerised tomography- and ultrasound-based thermometry. Background information on measuring principle, medical applications, advantages and weaknesses of each method are provided and discussed.
Collapse
Affiliation(s)
- Paola Saccomandi
- Unit of Measurements and Biomedical Instrumentation, Centre for Integrated Research, University Campus Bio-Medico , Rome , Italy
| | | | | |
Collapse
|
7
|
Marqa MF, Mordon S, Betrouni N. Laser interstitial thermotherapy of small breast fibroadenomas: numerical simulations. Lasers Surg Med 2012. [PMID: 23184405 DOI: 10.1002/lsm.22097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND Laser interstitial thermotherapy (LITT) is potentially a novel method to treat small breast fibroadenoma, without the need for surgical removal. Dosimetry planning and conformation of the treated area of tumor remain major issues, especially for a moving organ such as the breast. Pre-treatment simulation planning of this therapy is an effective method to predict the final thermal damage. In this study, a mathematical model is elaborated to simulate the heat distribution and the thermal damage. METHODS The mathematical model was based on finite element method (FEM) to solve the light distribution, bioheat, and thermal damage equations. Six simulations were performed with the following powers: 5, 6, 7, 8, 9, and 10 W (λ = 980 nm), and for an irradiation time of 125 seconds, with a 50 °C iso-damage temperature. To validate these simulations, six turkey breast samples were irradiated with parameters used for simulations. Volumes of thermal damage were calculated by using formulas: spherical, Elliptical, and Carlsson volumes and compared to the simulated volumes. RESULTS Differences between volumes were from 0.01 to 1 cm3. Interpolations between volumes from ex vivo experiments with corresponding powers were established. The relationship between the volume of the thermal damage and the laser power was described by a polynomial equation (R2 = 0.99). The power estimated by the interpolation to obtain 1 cm3 of thermal damage was 7.4 W (922 J) and the maximum corresponding temperature was 90 °C. CONCLUSION In this study, a good correlation was established between simulation and ex vivo experiments of LITT for fibroadenoma breast cancer.
Collapse
|
8
|
Residual tumor after laser ablation of human non-small-cell lung cancer demonstrated by ex vivo staining: correlation with invasive temperature measurements. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2011; 25:63-74. [DOI: 10.1007/s10334-011-0261-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 04/18/2011] [Accepted: 05/09/2011] [Indexed: 10/18/2022]
|
9
|
Nields MW. Industry perspective: maximizing the benefit of improved detection with guided and monitored thermal ablation of small tumors. Technol Cancer Res Treat 2005; 4:123-30. [PMID: 15773781 DOI: 10.1177/153303460500400201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The continuous growth of mammography is driven by global acceptance of the demonstrated ability of screening mammography to reduce mortality from breast cancer. An increasing number of benign and malignant tumors are being diagnosed as a result of the growth in mammography, improvements in technology, especially digital mammography, as well as by an increase in patient surveillance. Breast imaging technology for cancer screening continues to improve, with the integration of ultrasound with digital mammography showing promise that an even larger number of small abnormalities will be detected in screening programs. The results of minimally invasive ablative techniques as tested in pilot clinical studies for breast tumor ablation are reviewed. A new x-ray based thermal monitoring method is described. An improved ability to intraoperatively monitor thermal ablative methods may enable more accurate minimally invasive treatment of an ever increasing number of both benign and malignant breast tumors.
Collapse
|