1
|
Burger K, Urban T, Dombrowsky AC, Dierolf M, Günther B, Bartzsch S, Achterhold K, Combs SE, Schmid TE, Wilkens JJ, Pfeiffer F. Technical and dosimetric realization of in vivo x-ray microbeam irradiations at the Munich Compact Light Source. Med Phys 2020; 47:5183-5193. [PMID: 32757280 DOI: 10.1002/mp.14433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/15/2020] [Accepted: 07/20/2020] [Indexed: 12/20/2022] Open
Abstract
PURPOSE X-ray microbeam radiation therapy is a preclinical concept for tumor treatment promising tissue sparing and enhanced tumor control. With its spatially separated, periodic micrometer-sized pattern, this method requires a high dose rate and a collimated beam typically available at large synchrotron radiation facilities. To treat small animals with microbeams in a laboratory-sized environment, we developed a dedicated irradiation system at the Munich Compact Light Source (MuCLS). METHODS A specially made beam collimation optic allows to increase x-ray fluence rate at the position of the target. Monte Carlo simulations and measurements were conducted for accurate microbeam dosimetry. The dose during irradiation is determined by a calibrated flux monitoring system. Moreover, a positioning system including mouse monitoring was built. RESULTS We successfully commissioned the in vivo microbeam irradiation system for an exemplary xenograft tumor model in the mouse ear. By beam collimation, a dose rate of up to 5.3 Gy/min at 25 keV was achieved. Microbeam irradiations using a tungsten collimator with 50 μm slit size and 350 μm center-to-center spacing were performed at a mean dose rate of 0.6 Gy/min showing a high peak-to-valley dose ratio of about 200 in the mouse ear. The maximum circular field size of 3.5 mm in diameter can be enlarged using field patching. CONCLUSIONS This study shows that we can perform in vivo microbeam experiments at the MuCLS with a dedicated dosimetry and positioning system to advance this promising radiation therapy method at commercially available compact microbeam sources. Peak doses of up to 100 Gy per treatment seem feasible considering a recent upgrade for higher photon flux. The system can be adapted for tumor treatment in different animal models, for example, in the hind leg.
Collapse
Affiliation(s)
- Karin Burger
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Theresa Urban
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Annique C Dombrowsky
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Institute of Radiation Medicine (IRM), Department of Radiation Sciences (DRS), Helmholtz Zentrum München, Neuherberg, 85764, Germany
| | - Martin Dierolf
- Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Benedikt Günther
- Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Stefan Bartzsch
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Institute of Radiation Medicine (IRM), Department of Radiation Sciences (DRS), Helmholtz Zentrum München, Neuherberg, 85764, Germany
| | - Klaus Achterhold
- Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Stephanie E Combs
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Institute of Radiation Medicine (IRM), Department of Radiation Sciences (DRS), Helmholtz Zentrum München, Neuherberg, 85764, Germany
| | - Thomas E Schmid
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Institute of Radiation Medicine (IRM), Department of Radiation Sciences (DRS), Helmholtz Zentrum München, Neuherberg, 85764, Germany
| | - Jan J Wilkens
- Department of Radiation Oncology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, Munich, 81675, Germany.,Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany
| | - Franz Pfeiffer
- Chair of Biomedical Physics, Department of Physics and Munich School of BioEngineering, Technical University of Munich, Garching, 85748, Germany.,Department of Diagnostic and Interventional Radiology, School of Medicine & Klinikum rechts der Isar, Technical University of Munich, München, 81675, Germany
| |
Collapse
|
2
|
Dombrowsky AC, Burger K, Porth AK, Stein M, Dierolf M, Günther B, Achterhold K, Gleich B, Feuchtinger A, Bartzsch S, Beyreuther E, Combs SE, Pfeiffer F, Wilkens JJ, Schmid TE. A proof of principle experiment for microbeam radiation therapy at the Munich compact light source. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2020; 59:111-120. [PMID: 31655869 DOI: 10.1007/s00411-019-00816-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
Microbeam radiation therapy (MRT), a preclinical form of spatially fractionated radiotherapy, uses an array of microbeams of hard synchrotron X-ray radiation. Recently, compact synchrotron X-ray sources got more attention as they provide essential prerequisites for the translation of MRT into clinics while overcoming the limited access to synchrotron facilities. At the Munich compact light source (MuCLS), one of these novel compact X-ray facilities, a proof of principle experiment was conducted applying MRT to a xenograft tumor mouse model. First, subcutaneous tumors derived from the established squamous carcinoma cell line FaDu were irradiated at a conventional X-ray tube using broadbeam geometry to determine a suitable dose range for the tumor growth delay. For irradiations at the MuCLS, FaDu tumors were irradiated with broadbeam and microbeam irradiation at integral doses of either 3 Gy or 5 Gy and tumor growth delay was measured. Microbeams had a width of 50 µm and a center-to-center distance of 350 µm with peak doses of either 21 Gy or 35 Gy. A dose rate of up to 5 Gy/min was delivered to the tumor. Both doses and modalities delayed the tumor growth compared to a sham-irradiated tumor. The irradiated area and microbeam pattern were verified by staining of the DNA double-strand break marker γH2AX. This study demonstrates for the first time that MRT can be successfully performed in vivo at compact inverse Compton sources.
Collapse
Affiliation(s)
- Annique C Dombrowsky
- Institute of Radiation Medicine, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
| | - Karin Burger
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
- Chair of Biomedical Physics, Department of Physics, Technical University of Munich, 85748, Garching, Germany
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
| | - Ann-Kristin Porth
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
| | - Marlon Stein
- Institute of Radiation Medicine, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
| | - Martin Dierolf
- Chair of Biomedical Physics, Department of Physics, Technical University of Munich, 85748, Garching, Germany
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
| | - Benedikt Günther
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
| | - Klaus Achterhold
- Chair of Biomedical Physics, Department of Physics, Technical University of Munich, 85748, Garching, Germany
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
| | - Bernhard Gleich
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
| | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany
| | - Stefan Bartzsch
- Institute of Radiation Medicine, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
| | - Elke Beyreuther
- Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
- OncoRay, National Center for Radiation Research in Oncology, Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01328, Dresden, Germany
| | - Stephanie E Combs
- Institute of Radiation Medicine, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
- German Consortium for Translational Cancer Research, Deutsches Konsortium für Translationale Krebsforschung (dktk), Technical University Munich, 81675, Munich, Germany
| | - Franz Pfeiffer
- Chair of Biomedical Physics, Department of Physics, Technical University of Munich, 85748, Garching, Germany
- Munich School of BioEngineering, Technical University of Munich, 85748, Garching, Germany
- Department of Diagnostic and Interventional Radiobiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
| | - Jan J Wilkens
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany
- Chair of Biomedical Physics, Department of Physics, Technical University of Munich, 85748, Garching, Germany
| | - Thomas E Schmid
- Institute of Radiation Medicine, Helmholtz Zentrum München GmbH, 85764, Neuherberg, Germany.
- Department of Radiation Oncology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675, Munich, Germany.
| |
Collapse
|
3
|
Bazyar S, Inscoe CR, O’Brian ET, Zhou O, Lee YZ. Minibeam radiotherapy with small animal irradiators; in vitro and in vivo feasibility studies. ACTA ACUST UNITED AC 2017; 62:8924-8942. [DOI: 10.1088/1361-6560/aa926b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
4
|
Bartzsch S, Oelfke U. Line focus x-ray tubes-a new concept to produce high brilliance x-rays. Phys Med Biol 2017; 62:8600-8615. [PMID: 28976915 PMCID: PMC5659237 DOI: 10.1088/1361-6560/aa910b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/25/2017] [Accepted: 10/04/2017] [Indexed: 11/11/2022]
Abstract
Currently hard coherent x-ray radiation at high photon fluxes can only be produced with large and expensive radiation sources, such as 3[Formula: see text] generation synchrotrons. Especially in medicine, this limitation prevents various promising developments in imaging and therapy from being translated into clinical practice. Here we present a new concept of highly brilliant x-ray sources, line focus x-ray tubes (LFXTs), which may serve as a powerful and cheap alternative to synchrotrons and a range of other existing technologies. LFXTs employ an extremely thin focal spot and a rapidly rotating target for the electron beam which causes a change in the physical mechanism of target heating, allowing higher electron beam intensities at the focal spot. Monte Carlo simulations and numeric solutions of the heat equation are used to predict the characteristics of the LFXT. In terms of photon flux and coherence length, the performance of the line focus x-ray tube compares with inverse Compton scattering sources. Dose rates of up to 180 Gy [Formula: see text] can be reached in 50 cm distance from the focal spot. The results demonstrate that the line focus tube can serve as a powerful compact source for phase contrast imaging and microbeam radiation therapy. The production of a prototype seems technically feasible.
Collapse
Affiliation(s)
- Stefan Bartzsch
- The Institute Of Cancer Research, 123 Old Brompton Road, London SW7 3RP, United Kingdom
- Department of Radiation Oncology, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Straße 22, 81675 Munich, Germany
| | - Uwe Oelfke
- The Institute Of Cancer Research, 123 Old Brompton Road, London SW7 3RP, United Kingdom
| |
Collapse
|
5
|
Bazyar S, Inscoe CR, Benefield T, Zhang L, Lu J, Zhou O, Lee YZ. Neurocognitive sparing of desktop microbeam irradiation. Radiat Oncol 2017; 12:127. [PMID: 28800740 PMCID: PMC5554005 DOI: 10.1186/s13014-017-0864-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 08/07/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Normal tissue toxicity is the dose-limiting side effect of radiotherapy. Spatial fractionation irradiation techniques, like microbeam radiotherapy (MRT), have shown promising results in sparing the normal brain tissue. Most MRT studies have been conducted at synchrotron facilities. With the aim to make this promising treatment more available, we have built the first desktop image-guided MRT device based on carbon nanotube x-ray technology. In the current study, our purpose was to evaluate the effects of MRT on the rodent normal brain tissue using our device and compare it with the effect of the integrated equivalent homogenous dose. METHODS Twenty-four, 8-week-old male C57BL/6 J mice were randomly assigned to three groups: MRT, broad-beam (BB) and sham. The hippocampal region was irradiated with two parallel microbeams in the MRT group (beam width = 300 μm, center-to-center = 900 μm, 160 kVp). The BB group received the equivalent integral dose in the same area of their brain. Rotarod, marble burying and open-field activity tests were done pre- and every month post-irradiation up until 8 months to evaluate the cognitive changes and potential irradiation side effects on normal brain tissue. The open-field activity test was substituted by Barnes maze test at 8th month. A multilevel model, random coefficients approach was used to evaluate the longitudinal and temporal differences among treatment groups. RESULTS We found significant differences between BB group as compared to the microbeam-treated and sham mice in the number of buried marble and duration of the locomotion around the open-field arena than shams. Barnes maze revealed that BB mice had a lower capacity for spatial learning than MRT and shams. Mice in the BB group tend to gain weight at the slower pace than shams. No meaningful differences were found between MRT and sham up until 8-month follow-up using our measurements. CONCLUSIONS Applying MRT with our newly developed prototype compact CNT-based image-guided MRT system utilizing the current irradiation protocol can better preserve the integrity of normal brain tissue. Consequently, it enables applying higher irradiation dose that promises better tumor control. Further studies are required to evaluate the full extent effects of this novel modality.
Collapse
Affiliation(s)
- Soha Bazyar
- Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, 350 Chapman Hall, 4Chapel Hill, NC, 27599, USA.
| | - Christina R Inscoe
- Department of Applied Physics Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, USA.,Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Thad Benefield
- Biomedical Research Imaging Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Lei Zhang
- Department of Applied Physics Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Jianping Lu
- Department of Applied Physics Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, USA.,Biomedical Research Imaging Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Otto Zhou
- Department of Applied Physics Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, USA.,Biomedical Research Imaging Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA.,Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA
| | - Yueh Z Lee
- Department of Biomedical Engineering, The University of North Carolina at Chapel Hill, 350 Chapman Hall, 4Chapel Hill, NC, 27599, USA. .,Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, USA. .,Biomedical Research Imaging Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA. .,Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, USA. .,Department of Radiology, The University of North Carolina at Chapel Hill, CB#7510, Chapel Hill, NC, 27599, USA.
| |
Collapse
|
6
|
Belley MD, Stanton IN, Hadsell M, Ger R, Langloss BW, Lu J, Zhou O, Chang SX, Therien MJ, Yoshizumi TT. Fiber-optic detector for real time dosimetry of a micro-planar x-ray beam. Med Phys 2015; 42:1966-72. [PMID: 25832087 DOI: 10.1118/1.4915078] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
PURPOSE Here, the authors describe a dosimetry measurement technique for microbeam radiation therapy using a nanoparticle-terminated fiber-optic dosimeter (nano-FOD). METHODS The nano-FOD was placed in the center of a 2 cm diameter mouse phantom to measure the deep tissue dose and lateral beam profile of a planar x-ray microbeam. RESULTS The continuous dose rate at the x-ray microbeam peak measured with the nano-FOD was 1.91 ± 0.06 cGy s(-1), a value 2.7% higher than that determined via radiochromic film measurements (1.86 ± 0.15 cGy s(-1)). The nano-FOD-determined lateral beam full-width half max value of 420 μm exceeded that measured using radiochromic film (320 μm). Due to the 8° angle of the collimated microbeam and resulting volumetric effects within the scintillator, the profile measurements reported here are estimated to achieve a resolution of ∼0.1 mm; however, for a beam angle of 0°, the theoretical resolution would approach the thickness of the scintillator (∼0.01 mm). CONCLUSIONS This work provides proof-of-concept data and demonstrates that the novel nano-FOD device can be used to perform real-time dosimetry in microbeam radiation therapy to measure the continuous dose rate at the x-ray microbeam peak as well as the lateral beam shape.
Collapse
Affiliation(s)
- Matthew D Belley
- Medical Physics Graduate Program, Duke University Medical Center, Durham, North Carolina 27705 and Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, North Carolina 27710
| | - Ian N Stanton
- Department of Chemistry, Duke University, 124 Science Drive, Durham, North Carolina 27708
| | - Mike Hadsell
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Rachel Ger
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Brian W Langloss
- Department of Chemistry, Duke University, 124 Science Drive, Durham, North Carolina 27708
| | - Jianping Lu
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Otto Zhou
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599 and UNC Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina 27599
| | - Sha X Chang
- Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599; Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina 27599; and UNC Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina 27599
| | - Michael J Therien
- Department of Chemistry, Duke University, 124 Science Drive, Durham, North Carolina 27708
| | - Terry T Yoshizumi
- Medical Physics Graduate Program, Duke University Medical Center, Durham, North Carolina 27705;Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, North Carolina 27710; and Department of Radiology, Duke University Medical Center, Durham, North Carolina 27710
| |
Collapse
|
7
|
Yuan H, Zhang L, Frank JE, Inscoe CR, Burk LM, Hadsell M, Lee YZ, Lu J, Chang S, Zhou O. Treating Brain Tumor with Microbeam Radiation Generated by a Compact Carbon-Nanotube-Based Irradiator: Initial Radiation Efficacy Study. Radiat Res 2015; 184:322-33. [PMID: 26305294 DOI: 10.1667/rr13919.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Microbeam radiation treatment (MRT) using synchrotron radiation has shown great promise in the treatment of brain tumors, with a demonstrated ability to eradicate the tumor while sparing normal tissue in small animal models. With the goal of expediting the advancement of MRT research beyond the limited number of synchrotron facilities in the world, we recently developed a compact laboratory-scale microbeam irradiator using carbon nanotube (CNT) field emission-based X-ray source array technology. The focus of this study is to evaluate the effects of the microbeam radiation generated by this compact irradiator in terms of tumor control and normal tissue damage in a mouse brain tumor model. Mice with U87MG human glioblastoma were treated with sham irradiation, low-dose MRT, high-dose MRT or 10 Gy broad-beam radiation treatment (BRT). The microbeams were 280 μm wide and spaced at 900 μm center-to-center with peak dose at either 48 Gy (low-dose MRT) or 72 Gy (high-dose MRT). Survival studies showed that the mice treated with both MRT protocols had a significantly extended life span compared to the untreated control group (31.4 and 48.5% of life extension for low- and high-dose MRT, respectively) and had similar survival to the BRT group. Immunostaining on MRT mice demonstrated much higher DNA damage and apoptosis level in tumor tissue compared to the normal brain tissue. Apoptosis in normal tissue was significantly lower in the low-dose MRT group compared to that in the BRT group at 48 h postirradiation. Interestingly, there was a significantly higher level of cell proliferation in the MRT-treated normal tissue compared to that in the BRT-treated mice, indicating rapid normal tissue repairing process after MRT. Microbeam radiation exposure on normal brain tissue causes little apoptosis and no macrophage infiltration at 30 days after exposure. This study is the first biological assessment on MRT effects using the compact CNT-based irradiator. It provides an alternative technology that can enable widespread MRT research on mechanistic studies using a preclinical model, as well as further translational research towards clinical applications.
Collapse
Affiliation(s)
- Hong Yuan
- a Department of Radiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,b Biomedical Imaging Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Lei Zhang
- c Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Jonathan E Frank
- b Biomedical Imaging Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Christina R Inscoe
- c Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Laurel M Burk
- d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Mike Hadsell
- d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Yueh Z Lee
- a Department of Radiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,b Biomedical Imaging Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,e Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,g Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Jianping Lu
- c Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Sha Chang
- d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,e Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,f Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,g Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| | - Otto Zhou
- c Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,d Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599.,g Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599
| |
Collapse
|
8
|
Zhang L, Yuan H, Inscoe C, Chtcheprov P, Hadsell M, Lee Y, Lu J, Chang S, Zhou O. Nanotube x-ray for cancer therapy: a compact microbeam radiation therapy system for brain tumor treatment. Expert Rev Anticancer Ther 2015; 14:1411-8. [PMID: 25417729 DOI: 10.1586/14737140.2014.978293] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Microbeam radiation therapy (MRT) is a promising preclinical modality for cancer treatment, with remarkable preferential tumoricidal effects, that is, tumor eradication without damaging normal tissue functions. Significant lifespan extension has been demonstrated in brain tumor-bearing small animals treated with MRT. So far, MRT experiments can only be performed in a few synchrotron facilities around the world. Limited access to MRT facilities prevents this enormously promising radiotherapy technology from reaching the broader biomedical research community and hinders its potential clinical translation. We recently demonstrated, for the first time, the feasibility of generating microbeam radiation in a laboratory environment using a carbon nanotube x-ray source array and performed initial small animal studies with various brain tumor models. This new nanotechnology-enabled microbeam delivery method, although still in its infancy, has shown promise for achieving comparable therapeutic effects to synchrotron MRT and has offered a potential pathway for clinical translation.
Collapse
Affiliation(s)
- Lei Zhang
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | | | | | | | | | | | | | | |
Collapse
|