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Habibi B, Pashazadeh A, Pashazadeh S, Saghatforoush LA. A new method for the preparation of MgAl layered double hydroxide-copper metal-organic frameworks structures: application to electrocatalytic oxidation of formaldehyde. Sci Rep 2024; 14:5222. [PMID: 38433243 PMCID: PMC10909854 DOI: 10.1038/s41598-024-55770-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 02/27/2024] [Indexed: 03/05/2024] Open
Abstract
In this research, we present a novel design protocol for the in-situ synthesis of MgAl layered double hydroxide-copper metal-organic frameworks (LDH-MOFs) nanocomposite based on the electrocoagulation process and chemical method. The overall goal in this project is the primary synthesis of para-phthalic acid (PTA) intercalated MgAl-LDH with Cu (II) ions to produce the paddle-wheel like Cu-(PTA) MOFs nanocrystals on/in the MgAl-LDH structure. The physicochemical properties of final product; Cu-(PTA) MOFs/MgAl-LDH, were characterized by the surface analysis and chemical identification methods (SEM, EDX, TEM, XRD, BET, FTIR, CHN, DLS, etc.). The Cu-(PTA) MOFs/MgAl-LDH nanocomposite was used to modification of the carbon paste electrode (CPE); Cu-(PTA) MOFs/MgAl-LDH/CPE. The electrochemical performance of Cu-(PTA) MOFs/MgAl-LDH/CPE was demonstrated through the utilization of electrochemical methods. The results show a stable redox behavior of the Cu (III)/Cu (II) at the surface of Cu-(PTA) MOFs/MgAl-LDH/CPE in alkaline medium (aqueous 0.1 M NaOH electrolyte). Then, the Cu-(PTA) MOFs/MgAl-LDH/CPE was used as a new electrocatalyst toward the oxidation of formaldehyde (FA). Electrochemical data show that the Cu-(PTA) MOFs/MgAl-LDH/CPE exhibits superior electrocatalytic performance on the oxidation of FA. Also the diffusion coefficient, exchange current density (J°) and mean value of catalytic rate constant (Kcat) were found to be 1.18 × 10-6 cm2 s-1, 23 mA cm-2 and 0.4537 × 104 cm3 mol-1 s-1, respectively. In general, it can be said the Cu-(PTA) MOFs/MgAl-LDHs is promising candidate for applications in direct formaldehyde fuel cells.
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Affiliation(s)
- Biuck Habibi
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran
| | - Ali Pashazadeh
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran.
| | - Sara Pashazadeh
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran
| | - Lotf Ali Saghatforoush
- Department of Chemistry, Payame Noor University, Tehran, 19395-4697, Islamic Republic of Iran
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Pashazadeh A, Baghani HR, Robatjazi M, Kadavil P. The effect of geometrical parameters of skin brachytherapy patch source on depth dose distribution using Monte Carlo simulation. Appl Radiat Isot 2024; 204:111117. [PMID: 38007882 DOI: 10.1016/j.apradiso.2023.111117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/28/2023]
Abstract
Brachytherapy of superficial skin tumors using beta-emitting sources is a method that has been investigated by some researchers in both simulation and experimental studies with promising results. In the current study, the effect of geometrical parameters of some relevant radionuclides including Y-90, Re-188, P-32, and Ho-166 on the depth dose distribution in skin tissue has been investigated through Monte Carlo simulation. MCNPX Monte Carlo code was employed to model the above-mentioned patch sources in cylindrical format and then the effect of patch geometrical parameters including the source-to-skin distance (SSD), patch thickness, and patch diameter on depth dose distribution was assessed through modeling and calculation of the dose inside a cubic phantom mimicking the skin tissue. The obtained results demonstrated that increasing the SSD, patch thickness, and patch diameter (with the same activity) will reduce the depth dose distribution. Changing the SSD has a more significant effect on the dose gradient within the depth than other geometrical parameters. It was also observed that the effect of patch diameter on the skin-delivered dose gets less sensible as the patch size goes beyond the range of beta radiation inside tissue. Finally, it can be concluded that the patch source geometrical parameters can affect the depth dose distribution inside the skin tissue. This fact may be of concern regarding the delivery of a high radiation dose in a single treatment session. Therefore, variations of patch source geometrical parameters should be considered during the skin dose calculation plan.
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Affiliation(s)
- Ali Pashazadeh
- Institute of Medical Technology, Otto von Guericke University, Magdeburg, Germany
| | | | - Mostafa Robatjazi
- Medical Physics and Radiological Sciences Department, Sabzevar University of Medical Sciences, Sabzevar, Iran
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Habibi B, Pashazadeh S, Pashazadeh A, Saghatforoush LA. An amplified electrochemical sensor employing one-step synthesized nickel-copper-zinc ferrite/carboxymethyl cellulose/graphene oxide nanosheets composite for sensitive analysis of omeprazole. RSC Adv 2023; 13:29931-29943. [PMID: 37860173 PMCID: PMC10582824 DOI: 10.1039/d3ra04766k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 10/03/2023] [Indexed: 10/21/2023] Open
Abstract
In this work, a signal amplification strategy was designed by the fabrication of a highly sensitive and selective electrochemical sensor based on nickel-copper-zinc ferrite (Ni0.4Cu0.2Zn0.4Fe2O4)/carboxymethyl cellulose (CMC)/graphene oxide nanosheets (GONs) composite modified glassy carbon electrode (GCE) for determination of omeprazole (OMP). The one-step synthesized Ni0.4Cu0.2Zn0.4Fe2O4/CMC/GONs nanocomposite was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy and X-ray diffraction techniques. Then, the Ni0.4Cu0.2Zn0.4Fe2O4/CMC/GONs/GCE was applied to study the electrochemical behavior of the OMP. Electrochemical data show that the Ni0.4Cu0.2Zn0.4Fe2O4/CMC/GONs/GCE exhibits superior electrocatalytic performance on the oxidation of OMP compared with bare GCE, GONs/GCE, CMC/GONs/GCE and MFe2O4/GCE (M = Cu, Ni and Zn including single, double and triple of metals) which can be attributed to the synergistic effects of the nanocomposite components, outstanding electrical properties of Ni0.4Cu0.2Zn0.4Fe2O4 and high conductivity of CMC/GONs as well as the further electron transport action of the nanocomposite. Under optimal conditions, the Ni0.4Cu0.2Zn0.4Fe2O4/CMC/GONs/GCE offers a high performance toward the electrodetermination of OMP with the wide linear-range responses (0.24-5 and 5-75 μM), lower detection limit (0.22 ± 0.05 μM), high sensitivity (1.1543 μA μM-1 cm-2), long-term signal stability and reproducibility (RSD = 2.54%). It should be noted that the Ni0.4Cu0.2Zn0.4Fe2O4/CMC/GONs/GCE sensor could also be used for determination of OMP in drug and biological samples, indicating its feasibility for real analysis.
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Affiliation(s)
- Biuck Habibi
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University Tabriz 53714-161 Iran +98 41 34327541 +98 41 31452135
| | - Sara Pashazadeh
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University Tabriz 53714-161 Iran +98 41 34327541 +98 41 31452135
| | - Ali Pashazadeh
- Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University Tabriz 53714-161 Iran +98 41 34327541 +98 41 31452135
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Pashazadeh A, Hoeschen C. [Opportunities for artificial intelligence in radiation protection : Improving safety of diagnostic imaging]. Radiologie (Heidelb) 2023; 63:530-538. [PMID: 37347256 PMCID: PMC10299955 DOI: 10.1007/s00117-023-01167-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/16/2023] [Indexed: 06/23/2023]
Abstract
CLINICAL/METHODOLOGICAL ISSUE Imaging of structures of internal organs often requires ionizing radiation, which is a health risk. Reducing the radiation dose can increase the image noise, which means that images provide less information. STANDARD RADIOLOGICAL METHODS This problem is observed in commonly used medical imaging modalities such as computed tomography (CT), positron emission tomography (PET), single photon emission computed tomography (SPECT), angiography, fluoroscopy, and any modality that uses ionizing radiation for imaging. METHODOLOGICAL INNOVATIONS Artificial intelligence (AI) can improve the quality of low-dose images and help minimize radiation exposure. Potential applications are explored, and frameworks and procedures are critically evaluated. PERFORMANCE The performance of AI models varies. High-performance models could be used in clinical settings in the near future. Several challenges (e.g., quantitative accuracy, insufficient training data) must be addressed for optimal performance and widespread adoption of this technology in the field of medical imaging. PRACTICAL RECOMMENDATIONS To fully realize the potential of AI and deep learning (DL) in medical imaging, research and development must be intensified. In particular, quality control of AI models must be ensured, and training and testing data must be uncorrelated and quality assured. With sufficient scientific validation and rigorous quality management, AI could contribute to the safe use of low-dose techniques in medical imaging.
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Affiliation(s)
- Ali Pashazadeh
- Institut für Medizintechnik (IMT), Otto-von-Guericke-Universität Magdeburg, Otto-Hahn-Str. 2, 39016, Magdeburg, Deutschland.
| | - Christoph Hoeschen
- Institut für Medizintechnik (IMT), Otto-von-Guericke-Universität Magdeburg, Otto-Hahn-Str. 2, 39016, Magdeburg, Deutschland
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Pashazadeh A, Hoeschen C, Grosser OS, Kreissl MC, Kupitz D, Boese A, Illanes A, Friebe M. A concept to combine a gamma probe with ultrasound imaging for improved localization of sentinel lymph nodes: a feasibility study of the concept. Current Directions in Biomedical Engineering 2022. [DOI: 10.1515/cdbme-2022-1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
This paper presents the proof-of-concept study of an adaptor allowing the combination of a gamma probe with ultrasound (US) imaging, intending to improve the detectability of sentinel lymph nodes (SLNs). The performance of the adaptor in US imaging, in terms of depth of penetration and distance accuracy, and gamma scanning, in terms of sensitivity and spatial resolution, was investigated. We observed that the quality of the US imaging through the adaptor was promising and close to that of normal US imaging. However, the performance of the gamma probe through the adaptor was fairly poor, necessitating the improvement in the design of the adaptor for better gamma scanning. This study shall provide a basis for the development of a handheld gamma-US scanner for interventional procedures and small field-of-view (FOV) imaging in the future.
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Affiliation(s)
- Ali Pashazadeh
- Institute of Medical Engineering, Otto von Guericke University, Magdeburg , Germany
| | - Christoph Hoeschen
- Institute of Medical Engineering, Otto von Guericke University, Magdeburg , Germany
| | - Oliver S. Grosser
- Department of Radiology and Nuclear Medicine, University Hospital, Magdeburg , Germany
| | - Michael C. Kreissl
- Department of Radiology and Nuclear Medicine, University Hospital, Magdeburg , Germany
| | - Dennis Kupitz
- Department of Radiology and Nuclear Medicine, University Hospital, Magdeburg , Germany
| | - Axel Boese
- INKA, Otto von Guericke University, Magdeburg , Germany
| | | | - Michael Friebe
- INKA, Otto von Guericke University, Magdeburg, Germany & AGH University of Science and Technology, Department of Measurement and Electronics, Krakow , Poland
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Pashazadeh A, Hoeschen C. Comparison of the Y-90 brachytherapy and Ir-192 brachytherapy of skin tumors: a simulation study. Current Directions in Biomedical Engineering 2022. [DOI: 10.1515/cdbme-2022-1099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Skin brachytherapy is a successful practice for treating skin cancer patients. Although a gamma source like an Iridium-192 (Ir-192) is commonly used in the skin brachytherapy, the use of a beta source like Yttrium-90 (Y-90) has also been investigated for this purpose. In the current study, we simulated the dose distribution of a proposed Y-90 applicator and an Ir-192 Leipzig applicator in a skin phantom, and compared the performance of each of the methods in treating three tumors in three hypothetical scenarios. Results of this simulation study showed that because of the sharp dose falloff of beta radiation in tissue, the Y-90 applicator may lead to better protection of the bone and/or cartilage under thin tumors. However, it may lead to excessive skin surface dose if thick skin tumors are treated. To choose between the Ir-192 and Y- 90 applicators, one may need to consider the thickness of the tumor and the thickness of the adipose layer between the tumor and the bone.
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Affiliation(s)
- Ali Pashazadeh
- Institute of Medical Engineering, Otto von Guericke University, Magdeburg , Germany
| | - Christoph Hoeschen
- Institute of Medical Engineering, Otto von Guericke University, Magdeburg , Germany
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Pashazadeh A, Fomanka Lauretta N, Boese A, Friebe M. Hybrid handheld gamma-ultrasound prototype for radioguided surgery: initial results. Current Directions in Biomedical Engineering 2021. [DOI: 10.1515/cdbme-2021-2036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
We have witnessed impressive advances in preoperative imaging of cancer and the development of dualmodality scanners. However, there is a need for a scanner with functional and anatomical imaging capability suitable for surgical settings and radioguided surgery. The current paper introduces a handheld gamma-ultrasound scanner prototype and illustrates the initial result of testing its very first version. The result of the testing was promising and encouraging in continuing the further development of the prototype.
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Affiliation(s)
- Ali Pashazadeh
- Institute for Medical Technology, Otto von Guericke University, Magdeburg , Germany
| | - Nana Fomanka Lauretta
- Faculty of Medical System Engineering, Otto von Guericke University, Magdeburg , Germany
| | - Axel Boese
- INKA HealthTec Innovation Laboratory, Otto-von-Guericke-University, Magdeburg + IDTM GmbH, Recklinghausen , Germany
| | - Michael Friebe
- INKA HealthTec Innovation Laboratory, Otto-von-Guericke-University, Magdeburg + IDTM GmbH, Recklinghausen , Germany
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Robatjazi M, Baghani HR, Rostami A, Pashazadeh A. Monte Carlo-based calculation of nano-scale dose enhancement factor and relative biological effectiveness in using different nanoparticles as a radiosensitizer. Int J Radiat Biol 2021; 97:1289-1298. [PMID: 34047663 DOI: 10.1080/09553002.2021.1934748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Nowadays, some nanoparticles (NPs) are known and used as radiosensitizers in radiotherapy and radiobiology, due to their desired biological, physical, and chemical effects on cells. This study aimed to evaluate and compare the dose enhancement factor (DEF) and the biological effectiveness of some common NPs through EGSnrc and MCDS Monte Carlo (MC) simulation codes. MATERIALS AND METHODS To evaluate considered NPs' DEF, a single NP with 50 nm diameter was simulated at the center of concentric spheres. NP irradiations were done with 30, 60, and 100 keV photon energies. The secondary electron spectra were scored at the surface of considered NPs, and the dose values were scored at surrounding water-filled spherical shells which were distributed up to 4000 nm from the NP surface. The electron spectra were used in the MCDS code to obtain different initial DNA damages for the calculation of enhanced relative biological effectiveness (eRBE). RESULTS By decreasing the photon energy, an increment of DEF was seen for all studied NPs. The maximum DEF at 30, 60, and 100 keV photon energies were respectively related to silver (Ag), gadolinium (Gd), and bismuth (Bi) NPs. The maximum double-strand break (DSB) related (eRBEDSB) values for the 30 keV photon belonged to Ag, while BiNPs showed the maximum values at other photon energies. The minimum eRBEDSB values were also related to iron (Fe) NPs at the entire range of studied photon energies. CONCLUSIONS The compared nanoscale physical and biological results of our study can be helpful in the selection of optimum NP as a radiosensitizer in future radiobiological studies. Bi, gold (Au), Ag, and platinum (Pt) NPs had great potential, respectively, as radiosensitizers relative to the other studied NPs.
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Affiliation(s)
- Mostafa Robatjazi
- Medical Physics and Radiological Sciences Department, Sabzevar University of Medical Sciences, Sabzevar, Iran.,Non-Communicable Diseases Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | | | - Atefeh Rostami
- Medical Physics and Radiological Sciences Department, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Ali Pashazadeh
- Institute for Medical Technology, Otto von Guericke University, Magdeburg, Germany
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Habibi B, Pashazadeh S, Saghatforoush LA, Pashazadeh A. Direct electrochemical synthesis of the copper based metal-organic framework on/in the heteroatoms doped graphene/pencil graphite electrode: Highly sensitive and selective electrochemical sensor for sertraline hydrochloride. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115210] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Habibi B, Pashazadeh S, Saghatforoush LA, Pashazadeh A. A thioridazine hydrochloride electrochemical sensor based on zeolitic imidazolate framework-67-functionalized bio-mobile crystalline material-41 carbon quantum dots. NEW J CHEM 2021. [DOI: 10.1039/d1nj01949j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this research, we introduce an innovative nanocomposite based on ZIF-67/Bio-MCM-41/CQDs in order to fabricate a novel electrochemical sensor at the glassy carbon electrode and for the first time applied for the electrodetermination of the thioridazine hydrochloride.
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Affiliation(s)
- Biuck Habibi
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz 53714-161
| | - Sara Pashazadeh
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz 53714-161
| | | | - Ali Pashazadeh
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz 53714-161
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Pashazadeh A, Habibi B. A nickel ion-incorporating zinc-mesoporous metal organic framework thin film nanocomposite modified glassy carbon electrode for electrocatalytic oxidation of methanol in alkaline media. NEW J CHEM 2021. [DOI: 10.1039/d0nj05468b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this work, we have successfully synthesized a nickel ion-incorporating zinc-mesoporous metal–organic framework thin films (Zn-mMOFTFs) modified glassy carbon electrode (GCE), Ni/Zn-mMOFTFs/GCE, for electrooxidation of methanol in alkaline solution.
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Affiliation(s)
- Ali Pashazadeh
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz 53714-161
| | - Biuck Habibi
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz 53714-161
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Pashazadeh A, Friebe M. Transverse dose profile simulation of extruded lines for a 3D printed models for superficial skin cancer therapy. Current Directions in Biomedical Engineering 2020. [DOI: 10.1515/cdbme-2020-3143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
The short-range and sharp dose fall-off of beta particles in tissue make them an interesting option for use in the radiation therapy of superficial skin tumors. This can be used to protect bony or other sensitive structures located right beneath the tumor. In a previous study, we studied the feasibility of using 3D printing technology to create 2D radioactive models for the treatment of skin tumors. In the current study, the Monte Carlo method was used to simulate the transverse dose profile form 3D printed extruded line containing yttrium-90 (Y-90) particles. The time and activity required for treating a superficial skin tumor using these extruded lines were also calculated.
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Affiliation(s)
- Ali Pashazadeh
- INKA – Application Driven Research, Otto-von-Guericke University, Magdeburg , Germany
| | - Michael Friebe
- INKA – Application Driven Research, Otto-von- Guericke University, Magdeburg , Germany
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Pashazadeh A, Friebe M. Radioguided surgery: physical principles and an update on technological developments. ACTA ACUST UNITED AC 2020; 65:1-10. [DOI: 10.1515/bmt-2018-0016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 01/08/2019] [Indexed: 01/10/2023]
Abstract
AbstractRadioguided surgery (RGS) is the use of radiation detection probes and handheld gamma cameras in surgery rooms to identify radioactively labeled lesions inside the body with an aim to improve surgical outcome. In today’s surgery, application of these devices is a well-established practice, which provides surgeons with real-time information to guide them to the site of a lesion. In recent years, there have been several major improvements in the technology and design of gamma probes and handheld gamma cameras, enhancing their applications in surgical practices. Handheld gamma cameras, for example, are now moving from single-modality to dual-modality scanners that add anatomical data to the physiologic data, and with that provide more clinical information of the tissue under study. Also, in the last decade, a radioguided surgical technique based on the Cerenkov radiation was introduced, with more improved sensitivity in identifying radioactively labeled lesions. Additionally, recent advances in hybrid tracers have led to more efficient detection of lesions labeled with these tracers. Besides, it seems that combining medical robotics and augmented reality technology with current radioguided surgical practices potentially will change the delivery and performance of RGS in the near future. The current paper aims to give an overview of the physics of RGS and summarizes recent advances in this field that have a potential to improve the application of radioguided surgical procedures in the management of cancer.
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Affiliation(s)
- Ali Pashazadeh
- Chair for Catheter Technologies and Image Guided Procedures, Otto-von-Guericke University, Magdeburg, Germany
- Department of Radiology and Nuclear Medicine, Medical Faculty, Otto-von-Guericke University, INKA, Building 53, Rotgerstrasse 9, 39104 Magdeburg, Germany
| | - Michael Friebe
- Chair for Catheter Technologies and Image Guided Procedures, Otto-von-Guericke University, Magdeburg, Germany
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Pashazadeh A, Boese A, Castro NJ, Hutmacher DW, Friebe M. A new 3D printed applicator with radioactive gel for conformal brachytherapy of superficial skin tumors. Annu Int Conf IEEE Eng Med Biol Soc 2020; 2019:6979-6982. [PMID: 31947444 DOI: 10.1109/embc.2019.8856407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Surface brachytherapy is an effective method in the treatment of skin cancer. Current skin brachytherapy techniques are based on the placement of a source of gamma or X-ray photons in a close distance from the skin to irradiate the lesion. Due to the nature of photons, radiation dose in these methods may affect healthy tissue as well as sensitive structures around the target. In order to minimize unwarranted and incidental exposure, we propose a new skin brachytherapy applicator based upon beta particles which have penetration ranges of a few millimeters in tissue. The proposed concept is radioactive gel housed within a pre-designed tumor-specific applicator matching the topology of the skin lesion. The particles mixed with the gel showed a uniform distribution pattern, which is an essential prerequisite in having a uniform dose profile on the skin surface. Based on the dose calculation data from the proposed concept, the dose delivered to the depth of 4500 μm in skin tissue is 10% of the dose delivered to the surface of the tumor, making it suitable is treating thin skin tumors especially when located on top of the bone. Through the innovative combination of radioactive gel and tumor-specific applicator, the radiation entering the skin surface can be personalized while minimizing the adverse effects of undesired exposure to the surrounding healthy tissue.
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Pashazadeh A, de Paiva E, Mahmoodian N, Friebe M. Calculation of beta radiation dose of a circular Y-90 skin patch: Analytical and simulation methods. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pashazadeh A, Robatjazi M, Castro NJ, Friebe M. A multiwell applicator for conformal brachytherapy of superficial skin tumors: A simulation study. Skin Res Technol 2019; 26:537-541. [DOI: 10.1111/srt.12826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/15/2019] [Accepted: 12/08/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Ali Pashazadeh
- Chair for intelligent catheter and image guided procedures Otto von Guericke University Magdeburg Magdeburg Germany
| | - Mostafa Robatjazi
- Department of Medical Physics and Radiological Sciences Sabzevar University of Medical Sciences Sabzevar Iran
| | - Nathan J. Castro
- Joint Quantum Institute and Physical Measurements Laboratory NIST/University of Maryland Gaithersburg MD USA
| | - Michael Friebe
- Chair for intelligent catheter and image guided procedures Otto von Guericke University Magdeburg Magdeburg Germany
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Pashazadeh A, Landes R, Boese A, Kreissl MC, Klopfleisch M, Friebe M. Superficial skin cancer therapy with Y-90 microspheres: A feasibility study on patch preparation. Skin Res Technol 2019; 26:25-29. [PMID: 31338896 DOI: 10.1111/srt.12758] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 06/28/2019] [Indexed: 12/01/2022]
Abstract
BACKGROUND Radiation therapy using beta particles is an interesting treatment for very superficial skin lesions. Due to their low penetration in tissue and rapid dose fall-off, beta particles can protect underlying bony structures and surrounding healthy tissue while irradiating the skin tumor. In the current work, a simple method for the fabrication of a radioactive patch for use in skin cancer therapy based on a beta-emitting isotope is presented. MATERIALS AND METHODS The beta radiation sources were Y-90 microspheres currently used for catheter-based radioembolization of unresectable liver tumors. The microspheres were filtered through a syringe filter to trap them on the cellulose nitrate paper of the filter and create a radioactive patch. In the current study, to avoid the need for a hot laboratory, the experiment was done using nonradioactive microspheres. An optical microscope was used to verify the distribution of the particles on the filter paper. RESULTS Visual evaluation of the patches showed that using the proposed method, therapeutic skin patches with a fairly uniform distribution of microspheres can be created. CONCLUSION The proposed simple method may be used in creating radiotherapeutic patches using Y-90 microspheres for radiation therapy of thin skin lesions located close to sensitive structures.
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Affiliation(s)
- Ali Pashazadeh
- Chair for intelligent catheter and image guided procedures, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Rainer Landes
- Chair for intelligent catheter and image guided procedures, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Axel Boese
- Chair for intelligent catheter and image guided procedures, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Michael C Kreissl
- Department of Radiology and Nuclear Medicine, University Hospital Magdeburg, Magdeburg, Germany
| | - Maurice Klopfleisch
- Department of Radiology and Nuclear Medicine, University Hospital Magdeburg, Magdeburg, Germany
| | - Michael Friebe
- Chair for intelligent catheter and image guided procedures, Otto von Guericke University Magdeburg, Magdeburg, Germany
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Mahmoodian N, Schaufler A, Pashazadeh A, Boese A, Friebe M, Illanes A. Proximal detection of guide wire perforation using feature extraction from bispectral audio signal analysis combined with machine learning. Comput Biol Med 2019; 107:10-17. [DOI: 10.1016/j.compbiomed.2019.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/25/2019] [Accepted: 02/02/2019] [Indexed: 11/26/2022]
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Abstract
Nonmelanoma skin cancer (NMSC) is a major health concern due to its high incidence rate, its negative impact on the quality of life of patients as well as the associated economic burden to the healthcare system. Surgery is currently the primary treatment offered for skin cancer patients but not applicable or available in all cases. Radiation therapy (RT), with its long successful history in the management of cancer, has shown to be an effective alternative or complementary method in cutaneous oncology. Specifically, for dermatology applications, RT is very often the preferred option due to its favorable cosmetic results, besides the excellent control rate of the tumor. During the last 120 years since the introduction of treatments based on ionizing radiation, several techniques in this area have been developed. Radionuclide brachytherapy, electronic brachytherapy, X-ray therapies with kilovolt (kV) to megavolt (MV) photons and electron beam therapy are the established methods that are currently used on skin cancer patients. The purpose of this article is to overview these techniques and discuss the pros and cons of these methods in dermatology practices. Additionally, a new approach of beta RT of superficial skin tumors is discussed, which may offer exciting features in the management of NMSC.
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Affiliation(s)
- Ali Pashazadeh
- Chair for Intelligent Catheter and Image Guided Procedures, Otto von Guericke University , Magdeburg , Germany
| | - Axel Boese
- Chair for Intelligent Catheter and Image Guided Procedures, Otto von Guericke University , Magdeburg , Germany
| | - Michael Friebe
- Chair for Intelligent Catheter and Image Guided Procedures, Otto von Guericke University , Magdeburg , Germany
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Pashazadeh A, Castro N, Morganti E, Hutmacher D, Lagotzki S, Boese A, Friebe M. Conceptual design of a personalized radiation therapy patch for skin cancer. Current Directions in Biomedical Engineering 2018. [DOI: 10.1515/cdbme-2018-0146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractRadiation therapy is a valuable option for treatment of skin cancer. In order to deliver the radiation dose to the superficial skin tumor, an X-ray source, electron beam radiation therapy or a radioisotope is applied. The effectiveness of these procedures is well established in the literature. Findings of some recent studies have indicated that beta particles can be of particular interest in suppressing skin tumor growth. Betaemitting radioisotopes are favorable because of the short penetration depth of their emitted particles. Beta radiation can induce significant damage in superficial skin tumor, and at the same time, result in enhanced protection of the underlying healthy tissues. In this study, we propose the design of a patch that can be used in beta radiation therapy of skin cancer patients. For that, we describe the components of this radioactive patch, as well as a proposal for the subsequent clinical application procedure. A scaffold was used as a substrate for embedding the desired beta-emitting radioisotope, and two layers of hydrogel to provide protection and shielding for the radioactively labelled scaffold. The proposed design could provide a universal platform for all beta-emitting radioisotopes. Depending on the depth of the tumor spread, a suitable beta emitter for that specific tumor can be selected and used. This is of particular and critical importance in cases where the tumor is located directly on top of the bone and for which the depth of penetration of radiation should be limited to only the tumor volume. The proposed design has the mechanical flexibility to adapt to curved body regions so as to allow the use in anatomically challenging areas of the body.
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Affiliation(s)
- Ali Pashazadeh
- 1Chair for Catheter Technologies, Otto-von-Guericke University,Magdeburg, Germany
| | - Nathan Castro
- 2Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Kelvin Grove,Brisbane, Australia
| | - Elena Morganti
- 2Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Kelvin Grove,Brisbane, Australia
| | - Dietmar Hutmacher
- 2Centre in Regenerative Medicine, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Kelvin Grove,Brisbane, Australia
| | - Sinja Lagotzki
- 1Chair for Catheter Technologies, Otto-von-Guericke University,Magdeburg, Germany
| | - Axel Boese
- 1Chair for Catheter Technologies, Otto-von-Guericke University,Magdeburg, Germany
| | - Michael Friebe
- 1Chair for Catheter Technologies, Otto-von-Guericke University,Magdeburg, Germany
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Illanes A, Boese A, Maldonado I, Pashazadeh A, Schaufler A, Navab N, Friebe M. Novel clinical device tracking and tissue event characterization using proximally placed audio signal acquisition and processing. Sci Rep 2018; 8:12070. [PMID: 30104613 PMCID: PMC6089924 DOI: 10.1038/s41598-018-30641-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/02/2018] [Indexed: 11/24/2022] Open
Abstract
We propose a new and complementary approach to image guidance for monitoring medical interventional devices (MID) with human tissue interaction and surgery augmentation by acquiring acoustic emission data from the proximal end of the MID outside the patient to extract dynamical characteristics of the interaction between the distal tip and the tissue touched or penetrated by the MID. We conducted phantom based experiments (n = 955) to show dynamic tool/tissue interaction during tissue needle passage (a) and vessel perforation caused by guide wire artery perforation (b). We use time-varying auto-regressive (TV-AR) modelling to characterize the dynamic changes and time-varying maximal energy pole (TV-MEP) to compute subsequent analysis of MID/tissue interaction characterization patterns. Qualitative and quantitative analysis showed that the TV-AR spectrum and the TV-MEP indicated the time instants of the needle path through different phantom objects (a) and clearly showed a perforation versus other generated artefacts (b). We demonstrated that audio signals acquired from the proximal part of an MID could provide valuable additional information to surgeons during minimally invasive procedures.
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Affiliation(s)
- Alfredo Illanes
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany.
| | - Axel Boese
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany
| | - Iván Maldonado
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany
| | - Ali Pashazadeh
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany
| | - Anna Schaufler
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany
| | - Nassir Navab
- Technische Universität München, Fakultät für Informatik, München, Germany
| | - Michael Friebe
- Otto-von-Guericke-Universität, INKA Intelligente Katheter, Magdeburg, Germany
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Karim-Nezhad G, Pashazadeh S, Pashazadeh A. Electrocatalytic Oxidation of Hydrogen Peroxide at a Sol-gel Derived Carbon Ceramic Electrode Modified with Copper Iodide. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Karim-Nezhad G, Pashazadeh A, Pashazadeh S. Electro-Catalytic Oxidation of Amoxicillin by Carbon Ceramic Electrode Modified with Copper Iodide. Journal of the Korean Chemical Society 2013. [DOI: 10.5012/jkcs.2013.57.3.322] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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