1
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Giulbudagian M, Battisini B, Bäumler W, Blass Rico AM, Bocca B, Brungs C, Famele M, Foerster M, Gutsche B, Houben V, Hauri U, Karpienko K, Karst U, Katz LM, Kluger N, Serup J, Schreiver I, Schubert S, van der Bent SAS, Wolf C, Luch A, Laux P. Lessons learned in a decade: Medical-toxicological view of tattooing. J Eur Acad Dermatol Venereol 2024. [PMID: 38709160 DOI: 10.1111/jdv.20072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 03/15/2024] [Indexed: 05/07/2024]
Abstract
Tattooing has been part of the human culture for thousands of years, yet only in the past decades has it entered the mainstream of the society. With the rise in popularity, tattoos also gained attention among researchers, with the aim to better understand the health risks posed by their application. 'A medical-toxicological view of tattooing'-a work published in The Lancet almost a decade ago, resulted from the international collaboration of various experts in the field. Since then, much understanding has been achieved regarding adverse effects, treatment of complications, as well as their regulation for improving public health. Yet major knowledge gaps remain. This review article results from the Second International Conference on Tattoo Safety hosted by the German Federal Institute for Risk Assessment (BfR) and provides a glimpse from the medical-toxicological perspective, regulatory strategies and advances in the analysis of tattoo inks.
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Affiliation(s)
- Michael Giulbudagian
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Beatrice Battisini
- Department of Environment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Wolfgang Bäumler
- Department of Dermatology, University of Regensburg, Regensburg, Germany
| | - Ana M Blass Rico
- European Commission, DG Internal Market, Industry, Entrepreneurship and SMEs (GROW), Brussels, Belgium
| | - Beatrice Bocca
- Department of Environment and Health, Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Corinna Brungs
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Marco Famele
- National Centre for Chemicals, Cosmetic Products and Consumer's Health Protection - Istituto Superiore di Sanità (ISS), Rome, Italy
| | - Milena Foerster
- Environment and Lifestyle Epidemiology Branch, International Agency for Research on Cancer (IARC), Lyon, France
| | - Birgit Gutsche
- Karlsruhe Chemical and Veterinary Investigation Authority, Karlsruhe, Germany
| | | | - Urs Hauri
- Kanton Basel-Stadt, Kantonales Laboratorium, Basel, Switzerland
| | - Katarzyna Karpienko
- Department of Metrology and Optoelectronics, Faculty of Electronics, Telecommunication, and Informatics, Gdansk University of Technology, Gdansk, Poland
| | - Uwe Karst
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Linda M Katz
- Office of Cosmetics and Colors, United States Food and Drug Administration (FDA), College Park, Maryland, USA
| | - Nicolas Kluger
- Department of Dermatology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
- "Tattoo Consultation", Department of Dermatology, Bichat - Claude Bernard Hospital, Paris, France
- EADV Tattoo and Body Art Task Force, Lugano, Switzerland
| | - Jørgen Serup
- Department of Dermatology, the Tattoo Clinic, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Ines Schreiver
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Steffen Schubert
- Information Network of Departments of Dermatology - IVDK, Institute at the University Medical Center Göttingen, Göttingen, Germany
| | | | - Carina Wolf
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Andreas Luch
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Peter Laux
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
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2
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Powojska A, Mystkowski A, Gundabattini E, Mystkowska J. Spin-Coating Fabrication Method of PDMS/NdFeB Composites Using Chitosan/PCL Coating. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1973. [PMID: 38730780 PMCID: PMC11084651 DOI: 10.3390/ma17091973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/22/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024]
Abstract
This paper verified the possibility of applying chitosan and/or ferulic acid or polycaprolactone (PCL)-based coatings to polydimethylsiloxane/neodymium-iron-boron (PDMS/NdFeB) composites using the spin-coating method. The surface modification of magnetic composites by biofunctional layers allows for the preparation of materials for biomedical applications. Biofunctional layered magnetic composites were obtained in three steps. The spin-coating method with various parameters (time and spin speed) was used to apply different substances to the surface of the composites. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) were used to analyze the thickness and surface topography. The contact angle of the obtained surfaces was tested. Increasing spin speed and increasing process time for the same speed resulted in decreasing the composite's thickness. The linear and surface roughness for the prepared coatings were approximately 0.2 μm and 0.01 μm, respectively, which are desirable values in the context of biocompatibility. The contact angle test results showed that both the addition of chitosan and PCL to PDMS have reduced the contact angle θ from 105° for non-coated composite to θ~59-88° depending on the coating. The performed modifications gave promising results mainly due to making the surface hydrophilic, which is a desirable feature of projected biomaterials.
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Affiliation(s)
- Anna Powojska
- Department of Biomaterials and Medical Devices, Institute of Biomedical Engineering, Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland;
| | - Arkadiusz Mystkowski
- Department of Automatic Control and Robotics, Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D, 15-351 Bialystok, Poland;
| | - Edison Gundabattini
- Department of Thermal and Energy Engineering, School of Mechanical Engineering, Vellore Institute of Technology (VIT), Vellore 632 014, India;
| | - Joanna Mystkowska
- Department of Biomaterials and Medical Devices, Institute of Biomedical Engineering, Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska 45C, 15-351 Bialystok, Poland;
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3
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Raj P, Wu L, Arora S, Bhatt R, Zuo Y, Fang Z, Verdoold R, Koch T, Gu L, Barman I. Engineering vascularized skin-mimetic phantom for non-invasive Raman spectroscopy. SENSORS AND ACTUATORS. B, CHEMICAL 2024; 404:135240. [PMID: 38524639 PMCID: PMC10956615 DOI: 10.1016/j.snb.2023.135240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Recent advances in Raman spectroscopy have shown great potential for non-invasive analyte sensing, but the lack of a standardized optical phantom for these measurements has hindered further progress. While many research groups have developed optical phantoms that mimic bulk optical absorption and scattering, these materials typically have strong Raman scattering, making it difficult to distinguish metabolite signals. As a result, solid tissue phantoms for spectroscopy have been limited to highly scattering tissues such as bones and calcifications, and metabolite sensing has been primarily performed using liquid tissue phantoms. To address this issue, we have developed a layered skin-mimetic phantom that can support metabolite sensing through Raman spectroscopy. Our approach incorporates millifluidic vasculature that mimics blood vessels to allow for diffusion akin to metabolite diffusion in the skin. Furthermore, our skin phantoms are mechanically mimetic, providing an ideal model for development of minimally invasive optical techniques. By providing a standardized platform for measuring metabolites, our approach has the potential to facilitate critical developments in spectroscopic techniques and improve our understanding of metabolite dynamics in vivo.
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Affiliation(s)
- Piyush Raj
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Lintong Wu
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Saransh Arora
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Raj Bhatt
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Yi Zuo
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Zhiwei Fang
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | | | - Tanja Koch
- ams OSRAM Innovation and Engineering, Germany
| | - Luo Gu
- Department of Materials Science and Engineering, Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ishan Barman
- Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA
- Department of Radiology & Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA
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4
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Yang M, Wei Y, Reineck P, Ebendorff-Heidepriem H, Li J, McLaughlin RA. Development of a glass-based imaging phantom to model the optical properties of human tissue. BIOMEDICAL OPTICS EXPRESS 2024; 15:346-359. [PMID: 38223187 PMCID: PMC10783914 DOI: 10.1364/boe.504774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/30/2023] [Accepted: 12/03/2023] [Indexed: 01/16/2024]
Abstract
The fabrication of a stable, reproducible optical imaging phantom is critical to the assessment and optimization of optical imaging systems. We demonstrate the use of an alternative material, glass, for the development of tissue-mimicking phantoms. The glass matrix was doped with nickel ions to approximate the absorption of hemoglobin. Scattering levels representative of human tissue were induced in the glass matrix through controlled crystallization at elevated temperatures. We show that this type of glass is a viable material for creating tissue-mimicking optical phantoms by providing controlled levels of scattering and absorption with excellent optical homogeneity, long-term stability and reproducibility.
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Affiliation(s)
- Mingze Yang
- School of Biomedicine, The University of Adelaide, Adelaide, SA, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
| | - Yunle Wei
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
- School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Philipp Reineck
- School of Science, RMIT University, Melbourne, VIC, Australia
| | - Heike Ebendorff-Heidepriem
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
- School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, SA, Australia
| | - Jiawen Li
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
- School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, SA, Australia
| | - Robert A. McLaughlin
- School of Biomedicine, The University of Adelaide, Adelaide, SA, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, Australia
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5
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Evaluation of radiation attenuation properties on a various composition of polydimethylsiloxane (PDMS) for fabrication of kidney phantom. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Sadura F, Wróbel MS, Karpienko K. Colored Tattoo Ink Screening Method with Optical Tissue Phantoms and Raman Spectroscopy. MATERIALS 2021; 14:ma14123147. [PMID: 34201157 PMCID: PMC8227768 DOI: 10.3390/ma14123147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 12/30/2022]
Abstract
Due to the increasing popularity of tattoos among the general population, to ensure their safety and quality, there is a need to develop reliable and rapid methods for the analysis of the composition of tattoo inks, both in the ink itself and in already existing tattoos. This paper presents the possibility of using Raman spectroscopy to examine tattoo inks in biological materials. We have developed optical tissue phantoms mimicking the optical scattering coefficient typical for human dermis as a substitute for an in vivo study. The material employed herein allows for mimicking the tattoo-making procedure. We investigated the effect of the scattering coefficient of the matrix in which the ink is located, as well as its chemical compositions on the spectra. Raman surface line scanning has been carried out for each ink in the skin phantom to establish the spatial gradient of ink concentration distribution. This ensures the ability to detect miniature concentrations for a tattoo margin assessment. An analysis and comparison of the spectra of the inks and the tattooed inks in the phantoms are presented. We recommend the utilization of Raman spectroscopy as a screening method to enforce the tattoo ink safety legislations as well as an early medical diagnostic screening tool.
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7
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Zulina N, Caravaca O, Liao G, Gravelyn S, Schmitt M, Badu K, Heroin L, Gora MJ. Colon phantoms with cancer lesions for endoscopic characterization with optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2021; 12:955-968. [PMID: 33680552 PMCID: PMC7901311 DOI: 10.1364/boe.402081] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 05/31/2023]
Abstract
Optical coherence tomography (OCT) is a growing imaging technique for real-time early diagnosis of digestive system diseases. As with other well-established medical imaging modalities, OCT requires validated imaging performance and standardized test methods for performance assessment. A major limitation in the development and testing of new imaging technologies is the lack of models for simultaneous clinical procedure emulation and characterization of healthy and diseased tissues. Currently, the former can be tested in large animal models and the latter can be tested in small animal disease models or excised human biopsy samples. In this study, a 23 cm by 23 cm optical phantom was developed to mimic the thickness and near-infrared optical properties of each anatomical layer of a human colon, as well as the surface topography of colorectal polyps and visual appearance compatible with white light endoscopy.
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Affiliation(s)
- Natalia Zulina
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Oscar Caravaca
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Guiqiu Liao
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Sara Gravelyn
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Morgane Schmitt
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Keshia Badu
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
| | - Lucile Heroin
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
- Gastroenterology Department, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Michalina J Gora
- ICube Laboratory, CNRS, Strasbourg University, 1, Place de l'Hôpital - 67091 Strasbourg Cedex, France
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8
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Porous Phantoms Mimicking Tissues-Investigation of Optical Parameters Stability Over Time. MATERIALS 2021; 14:ma14020423. [PMID: 33467152 PMCID: PMC7829841 DOI: 10.3390/ma14020423] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/11/2021] [Accepted: 01/13/2021] [Indexed: 11/17/2022]
Abstract
Optical phantoms are used to validate optical measurement methods. The stability of their optical parameters over time allows them to be used and stored over long-term periods, while maintaining their optical parameters. The aim of the presented research was to investigate the stability of fabricated porous phantoms, which can be used as a lung phantom in optical system. Measurements were performed in multiple series with an interval of 6 months, recreating the same conditions and using the same measuring system consisting of an integrating sphere, a coherent light source with a wavelength of 635 nm and a detector. Scattering and absorption parameters were determined on the basis of the measured reflectance and transmittance. The tested samples were made of silicone and glycerol in various proportions.
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9
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Nanodiamond phantoms mimicking human liver: perspective to calibration of T1 relaxation time in magnetic resonance imaging. Sci Rep 2020; 10:6446. [PMID: 32296116 PMCID: PMC7160200 DOI: 10.1038/s41598-020-63581-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 03/30/2020] [Indexed: 11/21/2022] Open
Abstract
Phantoms of biological tissues are materials that mimic the properties of real tissues. This study shows the development of phantoms with nanodiamond particles for calibration of T1 relaxation time in magnetic resonance imaging. Magnetic resonance imaging (MRI) is a commonly used and non-invasive method of detecting pathological changes inside the human body. Nevertheless, before a new MRI device is approved for use, it is necessary to calibrate it properly and to check its technical parameters. In this article, we present phantoms of tissue with diamond nanoparticles dedicated to magnetic resonance calibration. The method of producing phantoms has been described. As a result of our research, we obtained phantoms that were characterized by the relaxation time T1 the same as the relaxation time of the human tissue T1 = 810.5 ms. Furthermore, the use of diamond nanoparticles in phantoms allowed us to tune the T1 value of the phantoms which open the way to elaborated phantoms of other tissues in the future.
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10
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Aziz A, Medina-Sánchez M, Claussen J, Schmidt OG. Real-Time Optoacoustic Tracking of Single Moving Micro-objects in Deep Phantom and Ex Vivo Tissues. NANO LETTERS 2019; 19:6612-6620. [PMID: 31411038 DOI: 10.1021/acs.nanolett.9b02869] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Medical imaging plays an important role in diagnosis and treatment of multiple diseases. It is a field which seeks for improved sensitivity and spatiotemporal resolution to allow the dynamic monitoring of diverse biological processes that occur at the micro- and nanoscale. Emerging technologies for targeted diagnosis and therapy such as nanotherapeutics, microimplants, catheters, and small medical tools also need to be precisely located and monitored while performing their function inside the human body. In this work, we show for the first time the real-time tracking of moving single micro-objects below centimeter thick phantom tissue and ex vivo chicken breast, using multispectral optoacoustic tomography (MSOT). This technique combines the advantages of ultrasound imaging regarding depth and resolution with the molecular specificity of optical methods, thereby facilitating the discrimination between the spectral signatures of the micro-objects from those of intrinsic tissue molecules. The resulting MSOT signal is further improved in terms of contrast and specificity by coating the micro-objects' surface with gold nanorods, possessing a unique absorption spectrum, which facilitate their discrimination from surrounding biological tissues when translated to future in vivo settings.
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Affiliation(s)
- Azaam Aziz
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
| | - Mariana Medina-Sánchez
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
| | - Jing Claussen
- iThera Medical GmbH , Zielstattstraße 13 , 81379 Munich , Germany
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences , Leibniz IFW Dresden , Helmholtzstraße 20 , 01069 Dresden , Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN) , TU Chemnitz , Reichenhainer Straße 10 , 09107 Chemnitz , Germany
- School of Science , TU Dresden , 01062 Dresden , Germany
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11
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Ratto F, Cavigli L, Borri C, Centi S, Magni G, Mazzoni M, Pini R. Hybrid organosilicon/polyol phantom for photoacoustic imaging. BIOMEDICAL OPTICS EXPRESS 2019; 10:3719-3730. [PMID: 31452970 PMCID: PMC6701555 DOI: 10.1364/boe.10.003719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/17/2019] [Accepted: 05/18/2019] [Indexed: 05/15/2023]
Abstract
The rapid development of hardware and software for photoacoustic technologies is urging the establishment of dedicated tools for standardization and performance assessment. In particular, the fabrication of anatomical phantoms for photoacoustic imaging remains an open question, as current solutions have not yet gained unanimous support. Here, we propose that a hybrid material made of a water-in-oil emulsion of glycerol and polydimethylsiloxane may represent a versatile platform to host a broad taxonomy of hydrophobic and hydrophilic dyes and recapitulate the optical and acoustic features of bio tissue. For a full optical parameterization, we refer to Wróbel, et al. [ Biomed. Opt. Express7, 2088 (2016)], where this material was first presented for optical imaging. Instead, here, we complete the picture and find that its speed of sound and acoustic attenuation resemble those of pure polydimethylsiloxane, i.e. respectively 1150 ± 30 m/s and 3.5 ± 0.4 dB/(MHz·cm). We demonstrate its use under a commercial B-mode scanner and a home-made A-mode stage for photoacoustic analysis to retrieve the ground-truth encoded in a multilayer architecture containing indocyanine green, plasmonic particles and red blood cells. Finally, we verify the stability of its acoustic, optical and geometric features over a time span of three months.
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Affiliation(s)
- Fulvio Ratto
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Lucia Cavigli
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Claudia Borri
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Sonia Centi
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Giada Magni
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Marina Mazzoni
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
| | - Roberto Pini
- Istituto di Fisica Applicata ‘Nello Carrara’ IFAC-CNR, Via Madonna del Piano, 10, 50019 Sesto Fiorentino (FI), Italy
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12
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Little CD, Poduval RK, Caulfield R, Noimark S, Colchester RJ, Loder CD, Tiwari MK, Rakhit RD, Papakonstantinou I, Desjardins AE. Micron resolution, high-fidelity three-dimensional vascular optical imaging phantoms. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-4. [PMID: 30770678 PMCID: PMC6498868 DOI: 10.1117/1.jbo.24.2.020502] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 01/08/2019] [Indexed: 05/13/2023]
Abstract
Microscopic and mesoscale optical imaging techniques allow for three-dimensional (3-D) imaging of biological tissue across millimeter-scale regions, and imaging phantom models are invaluable for system characterization and clinical training. Phantom models that replicate complex 3-D geometries with both structural and molecular contrast, with resolution and lateral dimensions equivalent to those of imaging techniques (<20 μm), have proven elusive. We present a method for fabricating phantom models using a combination of two-photon polymerization (2PP) to print scaffolds, and microinjection of tailored tissue-mimicking materials to simulate healthy and diseased tissue. We provide a first demonstration of the capabilities of this method with intravascular optical coherence tomography, an imaging technique widely used in clinical practice. We describe the design, fabrication, and validation of three types of phantom models: a first with subresolution wires (5- to 34-μm diameter) arranged circumferentially, a second with a vessel side-branch, and a third containing a lipid inclusion within a vessel. Silicone hybrid materials and lipids, microinjected within a resin framework created with 2PP, served as tissue-mimicking materials that provided realistic optical scattering and absorption. We demonstrate that optical phantom models made with 2PP and microinjected tissue-mimicking materials can simulate complex anatomy and pathology with exquisite detail.
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Affiliation(s)
- Callum D. Little
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- Royal Free Hospital, Department of Cardiology, London, United Kingdom
| | - Radhika K. Poduval
- University College London, Department of Electronic and Electrical Engineering, Photonic Innovations Lab, London, United Kingdom
- University College London, Department of Medical Physics and Bioengineering, London, United Kingdom
| | - Richard Caulfield
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- University College London, Department of Medical Physics and Bioengineering, London, United Kingdom
- University College London, Nanoengineered Systems Laboratory, UCL Mechanical Engineering, London, United Kingdom
| | - Sacha Noimark
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- University College London, Department of Medical Physics and Bioengineering, London, United Kingdom
| | - Richard J. Colchester
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- University College London, Department of Electronic and Electrical Engineering, Photonic Innovations Lab, London, United Kingdom
| | - Chris D. Loder
- Royal Free Hospital, Department of Cardiology, London, United Kingdom
| | - Manish K. Tiwari
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- University College London, Nanoengineered Systems Laboratory, UCL Mechanical Engineering, London, United Kingdom
| | - Roby D. Rakhit
- Royal Free Hospital, Department of Cardiology, London, United Kingdom
| | - Ioannis Papakonstantinou
- University College London, Department of Electronic and Electrical Engineering, Photonic Innovations Lab, London, United Kingdom
- Address all correspondence to Ioannis Papakonstantinou, E-mail: ; Adrien E. Desjardins, E-mail:
| | - Adrien E. Desjardins
- Wellcome Trust–EPSRC Centre for Interventional and Surgical Sciences, London, United Kingdom
- University College London, Department of Medical Physics and Bioengineering, London, United Kingdom
- Address all correspondence to Ioannis Papakonstantinou, E-mail: ; Adrien E. Desjardins, E-mail:
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13
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Eisel M, Ströbl S, Pongratz T, Stepp H, Rühm A, Sroka R. Investigation of optical properties of dissected and homogenized biological tissue. JOURNAL OF BIOMEDICAL OPTICS 2018; 23:1-9. [PMID: 30251487 DOI: 10.1117/1.jbo.23.9.091418] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
Knowledge of tissue optical properties, in particular the absorption μa and the reduced scattering coefficient μs', is required for diagnostic and therapeutic applications in which the light distribution during treatment has to be known. As it is generally very difficult to obtain this information with sufficient accuracy in vivo, optical properties are often approximately determined on ex vivo tissue samples. In this case, the obtained optical properties may strongly depend on the sample preparation. The extent of the expectable preparation-dependent differences was systematically investigated in comparative measurements on dissected and homogenized porcine tissue samples (liver, lung, brain, and muscle). These measurements were performed at wavelengths 520, 635, 660, and 785 nm, using a dual-step reflectance device and at a spectral range of 515 to 800 nm with an integrating sphere setup. In a third experiment, the density of tissue samples (dissected and homogenized) was investigated, as the characteristic of the packaging of internal tissue structures strongly influences the absorption and scattering. The standard errors of the obtained absorption and reduced scattering coefficients were found to be reduced in case of homogenized tissue. Homogenizing the tissues also allows a much easier and faster sample preparation, as macroscopic internal tissue structures are destroyed in the homogenized tissue so that a planar tissue sample with well-defined thickness can easily and accurately be prepared by filling the tissue paste into a cuvette. Consequently, a better reproducibility result was obtained when using homogenized samples. According to the density measurements accomplished for dissected and homogenized tissue samples, all types of tissues, except lung, showed a decrease in the density due to the homogenization process. The presented results are in good agreement for μs' regardless of the preparation procedure, whereas μa differs, probably influenced by blood content and dehydration. Because of faster and easier preparation and easier sample positioning, homogenization prior to measurement seems to be suitable for investigating the optical properties ex vivo. Additionally, by means of using the homogenization process, the sample size and thickness do not need to be particularly large, as is the case for most biopsies from the OR.
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Affiliation(s)
- Maximilian Eisel
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
| | - Stephan Ströbl
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
| | - Thomas Pongratz
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
| | - Herbert Stepp
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
| | - Adrian Rühm
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
| | - Ronald Sroka
- Klinikum der Universität München, Laser-Forschungslabor, LIFE-Zentrum, Munich, Germany
- University Hospital of Munich, Department of Urology, Munich, Germany
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14
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Szymanczyk J, Sawczak M, Cenian W, Karpienko K, Jedrzejewska-Szczerska M, Cenian A. Application of the laser diode with central wavelength 975 nm for the therapy of neurofibroma and hemangiomas. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:10502. [PMID: 28125156 DOI: 10.1117/1.jbo.22.1.010502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 01/06/2017] [Indexed: 06/06/2023]
Abstract
This paper presents a newly developed dermatological laser (with a central wavelength 975 nm) for application in therapies requiring deep penetration of tissue, e.g., cutaneous (dermal) neurofibroma (von Recklinghausen disease) and hemangiomas. This laser can work either in pulses or continues wave mode. Laser radiation is transmitted toward the application region by optical fiber with a diameter of 0.6 mm. The compact design of the laser facilitates its transport and increases the comfort of use.
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Affiliation(s)
- Jacek Szymanczyk
- Medical University of Warsaw, Department of Dermatology, 82a Koszykowa Street, Warsaw 02-008, Poland
| | - Miroslaw Sawczak
- Polish Academy of Sciences, Szewalski Institute of Fluid-flow Machinery, Department of Physical Aspects of Ecoenergy, 14 Fiszera Street, Gdansk 80-952, Poland
| | - Witold Cenian
- Polish Academy of Sciences, Szewalski Institute of Fluid-flow Machinery, Department of Physical Aspects of Ecoenergy, 14 Fiszera Street, Gdansk 80-952, Poland
| | - Katarzyna Karpienko
- Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, 11/12 Narutowicza Street, Gdansk 80-233, Poland
| | - Malgorzata Jedrzejewska-Szczerska
- Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, 11/12 Narutowicza Street, Gdansk 80-233, Poland
| | - Adam Cenian
- Polish Academy of Sciences, Szewalski Institute of Fluid-flow Machinery, Department of Physical Aspects of Ecoenergy, 14 Fiszera Street, Gdansk 80-952, Poland
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15
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Feder I, Wróbel M, Duadi H, Jędrzejewska-Szczerska M, Fixler D. Experimental results of full scattering profile from finger tissue-like phantom. BIOMEDICAL OPTICS EXPRESS 2016; 7:4695-4701. [PMID: 27896008 PMCID: PMC5119608 DOI: 10.1364/boe.7.004695] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/29/2016] [Accepted: 10/14/2016] [Indexed: 05/31/2023]
Abstract
Human tissue is one of the most complex optical media since it is turbid and nonhomogeneous. We suggest a new optical method for sensing physiological tissue state, based on the collection of the ejected light at all exit angles, to receive the full scattering profile. We built a unique set-up for noninvasive encircled measurement. We use a laser, a photodetector and finger tissues-mimicking phantoms presenting different optical properties. Our method reveals an isobaric point, which is independent of the optical properties. We compared the new finger tissues-like phantoms to others samples and found the linear dependence between the isobaric point's angle and the exact tissue geometry. These findings can be useful for biomedical applications such as non-invasive and simple diagnostic of the fingertip joint, ear lobe and pinched tissues.
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Affiliation(s)
- Idit Feder
- Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Israel
| | - Maciej Wróbel
- Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gabriela Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
| | - Hamootal Duadi
- Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Israel
| | - Małgorzata Jędrzejewska-Szczerska
- Gdańsk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gabriela Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
- Senior authors contributed equally
| | - Dror Fixler
- Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Israel
- Senior authors contributed equally
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