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Cifter G, Chin J, Cifter F, Altundal Y, Sinha N, Sajo E, Ngwa W. Targeted radiotherapy enhancement during electronic brachytherapy of accelerated partial breast irradiation (APBI) using controlled release of gold nanoparticles. Phys Med 2015; 31:1070-1074. [PMID: 26404139 DOI: 10.1016/j.ejmp.2015.07.138] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/24/2015] [Accepted: 07/26/2015] [Indexed: 10/23/2022] Open
Abstract
Several studies have demonstrated low rates of local recurrence with brachytherapy-based accelerated partial breast irradiation (APBI). However, long-term outcomes on toxicity (e.g. telangiectasia) and cosmesis remain a major concern. The purpose of this study is to investigate the dosimetric feasibility of using targeted non-toxic radiosensitizing gold nanoparticles (GNPs) for localized dose enhancement to the planning target volume (PTV) during electronic brachytherapy APBI while reducing normal tissue toxicity. We propose to incorporate GNPs into a micrometer-thick polymer film on the surface of routinely used lumpectomy balloon applicators and provide subsequent treatment using a 50 kVp Xoft device. An experimentally determined diffusion coefficient was used to determine space-time customizable distribution of GNPs for feasible in-vivo concentrations of 7 mg/g and 43 mg/g. An analytical approach from previously published work was employed to estimate the dose enhancement due to GNPs as a function of distance up to 1 cm from the lumpectomy cavity surface. Clinically significant dose enhancement values of at least 1.2, due to 2 nm GNPs, were found at 1 cm away from the lumpectomy cavity wall when using electronic brachytherapy APBI. Higher customizable dose enhancement was also achieved at other distances as a function of nanoparticle size. Our preliminary results suggest that significant dose enhancement can be achieved to residual tumor cells targeted with GNPs during APBI with electronic brachytherapy.
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Affiliation(s)
- G Cifter
- Medical Physics Program, Department of Physics and Applied Physics, University of Massachusetts at Lowell, 1 University Ave., Olney Science Center, Lowell, MA 01854, USA; Department of Radiation Oncology, Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Jimmy Fund Building, Boston, MA 02215, USA.
| | - J Chin
- Medical Physics Program, Department of Physics and Applied Physics, University of Massachusetts at Lowell, 1 University Ave., Olney Science Center, Lowell, MA 01854, USA
| | - F Cifter
- Department of Radiation Oncology, Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Jimmy Fund Building, Boston, MA 02215, USA
| | - Y Altundal
- Medical Physics Program, Department of Physics and Applied Physics, University of Massachusetts at Lowell, 1 University Ave., Olney Science Center, Lowell, MA 01854, USA
| | - N Sinha
- Department of Sciences, Wentworth Institute of Technology, 550 Huntington Ave., Boston, MA 02115, USA
| | - E Sajo
- Medical Physics Program, Department of Physics and Applied Physics, University of Massachusetts at Lowell, 1 University Ave., Olney Science Center, Lowell, MA 01854, USA
| | - W Ngwa
- Medical Physics Program, Department of Physics and Applied Physics, University of Massachusetts at Lowell, 1 University Ave., Olney Science Center, Lowell, MA 01854, USA; Department of Radiation Oncology, Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave., Jimmy Fund Building, Boston, MA 02215, USA
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