101
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Guan F, Titt U, Patel D, Bronk L, Taleei R, Peeler C, Mirkovic D, Grosshans D, Jakel O, Mohan R. WE-EF-BRA-05: Experimental Design for High-Throughput In-Vitro RBE Measurements Using Protons, Helium and Carbon Ions. Med Phys 2015. [DOI: 10.1118/1.4925984] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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102
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Ge S, Wang X, Randeniya K, Mohan R. TU-EF-304-01: BEST IN PHYSICS (THERAPY): Plan Robustness and Optimality Improvement with 4-Dimensional Robust Optimization for Lung Cancer Patients. Med Phys 2015. [DOI: 10.1118/1.4925647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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103
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Niedzielski J, Yang J, Stingo F, Krafft S, Martel M, Briere T, Mohan R, Court L. MO-AB-BRA-01: A Novel Method to Objectively Quantify Normal Tissue Toxicity in the Esophagus. Med Phys 2015. [DOI: 10.1118/1.4925271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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104
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Guan F, Bronk L, Kerr M, Titt U, Wang X, Taleei R, Peeler C, Patel D, Mirkovic D, Grosshans D, Mohan R. TU-EF-304-09: Quantifying the Biological Effects of Therapeutic Protons by LET Spectrum Analysis. Med Phys 2015. [DOI: 10.1118/1.4925664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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105
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Peeler C, Taleei R, Guan F, Bronk L, Patel D, Titt U, Mirkovic D, Stewart R, Grosshans D, Mohan R. SU-F-BRD-16: Relative Biological Effectiveness of Double-Strand Break Induction for Modeling Cell Survival in Pristine Proton Beams of Different Dose-Averaged Linear Energy Transfers. Med Phys 2015. [DOI: 10.1118/1.4925195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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106
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Cao W, Zaghian M, Randeniya K, Lim G, Titt U, Mohan R. SU-E-T-109: An Investigation of Including Variable Relative Biological Effectiveness in Intensity Modulated Proton Therapy Planning Optimization for Head and Neck Cancer Patients. Med Phys 2015. [DOI: 10.1118/1.4924470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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107
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Yepes P, Mirkovic D, Mohan R. SU-E-T-764: Track Repeating Algorithm for Proton Therapy Applied to Intensity Modulated Proton Therapy for Head-And-Neck Patients. Med Phys 2015. [DOI: 10.1118/1.4925128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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108
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Taleei R, Peeler C, Guan F, Patel D, Titt U, Mirkovic D, Grosshans D, Mohan R. SU-E-T-547: Modeling Biological Response to Proton Irradiation and Evaluating Its Potential Clinical Consequences. Med Phys 2015. [DOI: 10.1118/1.4924909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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109
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Mohan R, Lovelock M, Mageras G, LoSasso T, Chui C. Computer-controlled radiation therapy and multileaf collimation. Front Radiat Ther Oncol 2015; 29:123-38. [PMID: 8742894 DOI: 10.1159/000424713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- R Mohan
- Memorial Sloan-Kettering Cancer Center, New York, NY., USA
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Affiliation(s)
- R Mohan
- Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, N.Y., USA
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111
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Kutcher GJ, Leibel SA, Mohan R, Harrison LB, Armstrong JG, Zelefsky MF, LoSasso TJ, Burman CM, Mageras GS, Chui CS. Advances in precision treatment: some aspects of 3D conformal radiation therapy. Front Radiat Ther Oncol 2015; 27:209-26. [PMID: 8504948 DOI: 10.1159/000422094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- G J Kutcher
- Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, N.Y
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112
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Oborn BM, Dowdell S, Metcalfe PE, Crozier S, Mohan R, Keall PJ. Proton beam deflection in MRI fields: Implications for MRI-guided proton therapy. Med Phys 2015; 42:2113-24. [DOI: 10.1118/1.4916661] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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113
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Mohan R, Raja S, Saraswathy G, Das BN. SURFACE MODIFICATION OF TPR SOLE: AN APPROACH TO IMPROVE SLIP RESISTANCE ON QUARRY AND CERAMIC TILES. Rubber Chemistry and Technology 2015. [DOI: 10.5254/rct.14.85965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Human slip on smooth surfaces is a common accident, even though the footwear soling materials are designed with cleats and treads to provide more friction with the floor. About 20% of footwear is made with thermoplastic rubber (TPR; styrene-butadiene-styrene) soles. The slip resistance property under wet-flooring conditions of this kind of sole is poor because of the nonionic nature of the polymer. Chemical surface modification can be exploited to improve the slip-resistance property of TPR soles. The surface is chemically modified with trichloroisocyanuric acid in a methyl ethyl ketone medium (TCI/MEK; at 1, 2, and 3%) to introduce chlorinated and oxidized moieties to the rubber surface. The extent of surface modification produced in TPR with this change can be tested using attenuated total reflectance–Fourier transform infrared spectroscopy, scanning electron microscopy, and contact angle and surface roughness measurements. The improvement in slip resistance can be evaluated by measuring the coefficient of friction using a dynamic slip-resistance tester. The extent of the change in the functional physical properties, such as surface roughness, contact angle, work adhesion, in slip resistance can be improved by optimizing the concentration of trichloroisocyanuric acid. Physicomechanical properties of unmodified and modified soles that are essential for wear performance can be tested and compared. Quantitative changes on the surface of modified rubber soles increases surface roughness, reduces contact angles, and increases work energy, so there is a considerable increase in the coefficient of friction, especially under wet floor conditions. The chemical surface treatment tends to reduce the bulk mechanical properties, such as tensile strength, elongation at break, and abrasion resistance, because cyanuric acid attacks the sole. The coefficient of friction produces a positive trend at 1 and 2% TCI/MEK treatments, but the trend is negative at a 3% concentration. The optimum surface treatment level for surface modification to enhance the slip resistance of TPR is 2% TCI/MEK.
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Affiliation(s)
- R. Mohan
- Shoe Design and Development Centre, Council of Scientific and Industrial Research - Central Leather Research Institute, Adyar, Chennai 600020, India
| | - S. Raja
- Permanent address: National Institute of Research in Tuberculosis, Indian Council of Medical Research, Chetpet, Chennai 600031, India
| | - G. Saraswathy
- Shoe Design and Development Centre, Council of Scientific and Industrial Research - Central Leather Research Institute, Adyar, Chennai 600020, India
| | - B. N. Das
- Shoe Design and Development Centre, Council of Scientific and Industrial Research - Central Leather Research Institute, Adyar, Chennai 600020, India
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114
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Okoyeh E, Murthy N, Mohan R, Krishna K. Heavy Metal Concentration in the Soil and Sediment of Kotur Industrial Area Hyderabad, India. ACTA ACUST UNITED AC 2015. [DOI: 10.9734/jsrr/2015/15858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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115
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Mani G, Rajarajan K, Lydia Caroline M, Sagayaraj P, Mohan R. Growth, optical and thermal studies of pure and thiourea doped ammonium pentaborate nonlinear optical single crystals. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/1433075x14y.0000000266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- G. Mani
- PG & Research Department of PhysicsArignar Anna.Govt. Arts College, Cheyyar 604 407, TN, India
| | - K. Rajarajan
- Department of PhysicsR.V. Govt. Arts College, Chengalpet 603001, TN, India
| | - M. Lydia Caroline
- PG & Research Department of PhysicsArignar Anna.Govt. Arts College, Cheyyar 604 407, TN, India
| | - P. Sagayaraj
- Department of PhysicsLoyola College, Chennai 600 034, India
| | - R. Mohan
- Department of PhysicsPresidency College, Chennai 600 005, India
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116
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Liao Z, Mohan R, Xu T, Cox J, Tucker S. Comparing Risk of Radiation Pneumonitis After Intensity Modulated Radiation Therapy Versus Proton Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.08.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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117
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Liao Z, Mohan R, Xu T, Cox J, Tucker S. Comparing Risk Of Radiation Pneumonitis After Intensity-modulated Radiotherapy Vs. Proton Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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118
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Liu A, Xu T, Gomez D, O'Reilly M, Lin S, Nguyen Q, Levy L, Komaki R, Mohan R, Liao Z. Serum CRP Is Predictive if Survival in Non-Small-Cell Lung Cancer Patients Treated With Definitive Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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119
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Giaddui T, Chen W, Yu J, Lin L, Simone C, Wu J, Mohan R, Zhang X, Bluett J, Gillin M, Liao Z, Liao Z, Moore K, Bradley J, O'Meara E, Presley J, Galvin J, Xiao Y. A Dosimetric Pilot Study on the Feasibility of the Dosimetric Compliance Criteria of RTOG 1308: Phase III Randomized Trial Comparing Overall Survival After Photon Versus Proton Radiochemotherapy for Inoperable Stage II-IIIB NSCLC. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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120
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Xu T, Gomez D, O'Reilly M, Nguyen Q, Levy L, Komaki R, Mohan R, Liao Z. Serum VEGF Associated With Survival in Non-Small Cell Lung Cancer Patients Treated With Definitive Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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121
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Mohan R, Atreja SK. ‘Soya Milk Tris-based Phytoextender Reduces Apoptosis in Cryopreserved Buffalo (Bubalus bubalis) Spermatozoa’. Reprod Domest Anim 2014; 49:797-805. [DOI: 10.1111/rda.12371] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 06/03/2014] [Indexed: 11/28/2022]
Affiliation(s)
- R Mohan
- Reproductive Biochemistry Laboratory; Animal Biochemistry Division; National Dairy Research Institute; Karnal Haryana India
| | - SK Atreja
- Reproductive Biochemistry Laboratory; Animal Biochemistry Division; National Dairy Research Institute; Karnal Haryana India
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122
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Mohan R, Tosolini AP, Morris R. Targeting the motor end plates in the mouse hindlimb gives access to a greater number of spinal cord motor neurons: an approach to maximize retrograde transport. Neuroscience 2014; 274:318-30. [PMID: 24892760 DOI: 10.1016/j.neuroscience.2014.05.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [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: 03/24/2014] [Revised: 05/05/2014] [Accepted: 05/21/2014] [Indexed: 11/15/2022]
Abstract
Lower motor neuron dysfunction is one of the most debilitating neurological conditions and, as such, significantly impacts on the quality of life of affected individuals. Within the last decade, the engineering of mouse models of lower motor neuron diseases has facilitated the development of new therapeutic scenarios aimed at delaying or reversing the progression of these conditions. In this context, motor end plates (MEPs) are highly specialized regions on the skeletal musculature that offer minimally invasive access to the pre-synaptic nerve terminals, henceforth to the spinal cord motor neurons. Transgenic technologies can take advantage of the relationship between the MEP regions on the skeletal muscles and the corresponding motor neurons to shuttle therapeutic genes into specific compartments within the ventral horn of the spinal cord. The first aim of this neuroanatomical investigation was to map the details of the organization of the MEP zones for the main muscles of the mouse hindlimb. The hindlimb was selected for the present work, as it is currently a common target to challenge the efficacy of therapies aimed at alleviating neuromuscular dysfunction. This MEP map was then used to guide series of intramuscular injections of Fluoro-Gold (FG) along the muscles' MEP zones, therefore revealing the distribution of the motor neurons that supply them. Targeting the entire MEP regions with FG increased the somatic availability of the retrograde tracer and, consequently, gave rise to FG-positive motor neurons that are organized into rostro-caudal columns spanning more spinal cord segments than previously reported. The results of this investigation will have positive implications for future studies involving the somatic delivery and retrograde transport of therapeutic transgenes into affected motor neurons. These data will also provide a framework for transgenic technologies aiming at maintaining the integrity of the neuromuscular junction for the treatment of lower motor neuron dysfunctions.
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Affiliation(s)
- R Mohan
- Translational Neuroscience Facility, School of Medical Sciences, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - A P Tosolini
- Translational Neuroscience Facility, School of Medical Sciences, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - R Morris
- Translational Neuroscience Facility, School of Medical Sciences, The University of New South Wales, Sydney, NSW, 2052, Australia.
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Mirkovic D, Yepes P, Titt U, Mohan R. TH-A-19A-10: Fast Four Dimensional Monte Carlo Dose Computations for Proton Therapy of Lung Cancer. Med Phys 2014. [DOI: 10.1118/1.4889543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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124
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Peeler C, Taleei R, Guan F, Bronk L, Grosshans D, Mirkovic D, Titt U, Mohan R. SU-E-T-47: Application of the Repair-Misrepair-Fixation RBE Model to Describe the Results of High Resolution Proton Irradiation Cell Survival Experiments. Med Phys 2014. [DOI: 10.1118/1.4888377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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125
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Bronk L, Guan F, Kerr M, Dinh J, Titt U, Mirkovic D, Lin S, Mohan R, Grosshans D. WE-E-BRE-07: High-Throughput Mapping of Proton Biologic Effect. Med Phys 2014. [DOI: 10.1118/1.4889436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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126
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Liu W, Liao Z, Schild S, Park P, Li H, Li Y, Li X, Shen J, Anand A, Sahoo N, Dong L, Bues M, Zhu X, Mohan R. SU-E-T-452: Impact of Respiratory Motion On Robustly-Optimized Intensity-Modulated Proton Therapy to Treat Lung Cancers. Med Phys 2014. [DOI: 10.1118/1.4888785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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127
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Matney J, Park P, Court L, Zhu X, Li H, Liu W, Dong L, Mohan R. TH-C-BRD-08: Reducing the Effect of Respiratory Motion On the Delivered Dose in Proton Therapy Through Proper Field Angle Selection. Med Phys 2014. [DOI: 10.1118/1.4889606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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128
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Taleei R, Titt U, Peeler C, Guan F, Mirkovic D, Grosshans D, Mohan R. TH-A-19A-05: Modeling Physics Properties and Biologic Effects Induced by Proton and Helium Ions. Med Phys 2014. [DOI: 10.1118/1.4889538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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129
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Randeniya S, Mirkovic D, Titt U, Guan F, Mohan R. SU-E-T-491: Importance of Energy Dependent Protons Per MU Calibration Factors in IMPT Dose Calculations Using Monte Carlo Technique. Med Phys 2014. [DOI: 10.1118/1.4888824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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130
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Titt U, Mirkovic D, Liu A, Anand A, Perles L, Ciangaru G, Mohan R. SU-E-T-584: Commissioning of the MC2 Monte Carlo Dose Computation Engine. Med Phys 2014. [DOI: 10.1118/1.4888920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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131
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Cao W, Zaghian M, Liu W, Kardar L, Randeniya S, Lim G, Mohan R. TH-C-BRD-10: An Evaluation of Three Robust Optimization Approaches in IMPT Treatment Planning. Med Phys 2014. [DOI: 10.1118/1.4889608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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132
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Guan F, Bronk L, Kerr M, Titt U, Taleei R, Mirkovic D, Zhu X, Grosshans D, Mohan R. TH-A-19A-07: The Effect of Particle Tracking Step Size Limit On Monte Carlo- Computed LET Spectrum of Therapeutic Proton Beams. Med Phys 2014. [DOI: 10.1118/1.4889540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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133
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Rothenberg L, Mohan R, Van Dyk J, Fraass B, Bortfeld T. WE-G-16A-01: Evolution of Radiation Treatment Planning. Med Phys 2014. [DOI: 10.1118/1.4889474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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134
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Mohan R, Pelc N, Jaffray D, Mackie T. TU-C-BRF-01: Innovation in Medical Physics and Engineering. Med Phys 2014. [DOI: 10.1118/1.4889275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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135
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136
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Babu KSS, Dhavamurthy M, NizamMohideen M, Peramaiyan G, Mohan R. 2-Amino-6-methyl-pyridinium 4-methyl-benzene-sulfonate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o600-1. [PMID: 24860395 PMCID: PMC4011207 DOI: 10.1107/s1600536814008587] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 04/10/2014] [Accepted: 04/15/2014] [Indexed: 11/10/2022]
Abstract
In the asymmetric unit of the title salt, C6H9N2+·C7H7O3S−, there are two independent 2-amino-6-methylpyridinium cations and two independent 4-methylbenzenesulfonate anions. Both cations are protonated at their pyridine N atoms and their geometries reveal amine–imine tautomerism. In the 4-methylbenzenesulfonate anions, the carboxylate groups are twisted out of the benzene ring planes by 88.4 (1) and 86.2 (2)°. In the crystal, the sulfonate O atoms of an anion interact with the protonated N atoms and the 2-amino groups of a cation via a pair of N—H⋯O hydrogen bonds, forming an R22(8) ring motif. These motifs are connected via N—H⋯O hydrogen bonds, forming chains running along the a-axis direction. Within the chains there are weak C—H⋯O hydrogen bonds present. In addition, aromatic π–π stacking interactions [centroid–centroid distances = 3.771 (2), 3.599 (2), 3.599 (2) and 3.497 (2) Å] involving neighbouring chains are also observed.
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Affiliation(s)
- K Syed Suresh Babu
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India ; Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - M Dhavamurthy
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India
| | - M NizamMohideen
- Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - G Peramaiyan
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India
| | - R Mohan
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India
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137
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Babu KSS, Peramaiyan G, NizamMohideen M, Mohan R. 2-Amino-6-methyl-pyridinium 2,2,2-tri-chloro-acetate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o391-2. [PMID: 24826114 PMCID: PMC3998557 DOI: 10.1107/s1600536814004553] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 02/26/2014] [Accepted: 02/27/2014] [Indexed: 11/10/2022]
Abstract
In the asymmetric unit of the title molecular salt, C6H9N2+·C2Cl3O2−, there are two independent 2-amino-6-methylpyridinium cations and two independent trichloroacetate anions. The pyridine N atom of the 2-amino-6-methylpyridine molecule is protonated and the geometries of these cations reveal amine–imine tautomerism. Both protonated 2-amino-6-methylpyridinium cations are essentially planar [maximum deviations = 0.026 (2) and 0.012 (2) Å]. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N—H⋯O hydrogen bonds, forming an R22(8) ring motif. These motifs are connected via N—H⋯O and C—H⋯O hydrogen bonds to form slabs parallel to (101).
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Affiliation(s)
- K Syed Suresh Babu
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India ; Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - G Peramaiyan
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India
| | - M NizamMohideen
- Department of Physics, The New College (Autonomous), Chennai 600 014, Tamil Nadu, India
| | - R Mohan
- Department of Physics, Presidency College (Autonomous), Chennai 600 005, Tamil Nadu, India
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Mohan R. 139: Robust Optimization of IMPT Dose Distributions. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)34160-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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139
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Perles LA, Mirkovic D, Anand A, Titt U, Mohan R. LET dependence of the response of EBT2 films in proton dosimetry modeled as a bimolecular chemical reaction. Phys Med Biol 2013; 58:8477-91. [DOI: 10.1088/0031-9155/58/23/8477] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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140
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Arularasan P, Chakkaravarthi G, Mohan R. catena-Poly[[bis-(nitrato-κ(2) O,O')barium]-bis-(μ-l-histidine-κ(3) O,O':O]. Acta Crystallogr Sect E Struct Rep Online 2013; 69:m597. [PMID: 24454031 PMCID: PMC3884255 DOI: 10.1107/s1600536813027402] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 10/06/2013] [Indexed: 11/18/2022]
Abstract
In the polymeric title compound, [Ba(NO3)2(C6H9N3O2)2]n, the BaII atom is located on a crystallographic twofold axis and is coordinated by ten O atoms. Six are derived from two zwitterionic l-histidine molecules that simultaneously chelate one BaII atom and bridge to another. The remaining four O atoms are derived from two chelating nitrates. The molecules assemble to form a chain along [010]. In the crystal, chains are linked via N—H⋯O and N—H⋯N hydrogen bonds, generating a three-dimensional network.
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Affiliation(s)
- P Arularasan
- Department of Physics, Presidency College, Chennai 600 005, India
| | - G Chakkaravarthi
- Department of Physics, CPCL Polytechnic College, Chennai 600 068, India
| | - R Mohan
- Department of Physics, Presidency College, Chennai 600 005, India
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141
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Arularasan P, B Sivakumar, Chakkaravarthi G, Mohan R. Bis(μ-l-arginine-κ(3) N (2),O:O')bis-(l-arginine-κ(2) N (2),O)tetra-μ-chlorido-tetra-chlorido-tetra-copper(II). Acta Crystallogr Sect E Struct Rep Online 2013; 69:m583-4. [PMID: 24454023 PMCID: PMC3884247 DOI: 10.1107/s1600536813026780] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [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: 08/30/2013] [Accepted: 09/29/2013] [Indexed: 11/24/2022]
Abstract
The title compound, [Cu4Cl8(C6H14N4O2)4], contains four molecules in the asymmetric unit. In the molecular structure, each of the four Cu2+ ions binds to three Cl atoms, one N atom and one O atom, resulting in distorted square-pyramidal coordination environments. The molecular structure is stabilized by weak C—H⋯O and N—H⋯Cl hydrogen bonds. The crystal structure exhibit weak intermolecular N—H⋯O, C—H⋯O and N—H⋯Cl interactions, generating a three-dimensional network.
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Affiliation(s)
- P Arularasan
- Department of Physics, Presidency College, Chennai 600 005, India
| | - B Sivakumar
- Department of Physics, Presidency College, Chennai 600 005, India
| | - G Chakkaravarthi
- Department of Physics, CPCL Polytechnic College, Chennai 600 068, India
| | - R Mohan
- Department of Physics, Presidency College, Chennai 600 005, India
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142
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Xu T, Gomez D, O'Reilly M, Guerrero T, Nguyen Q, Levy L, Huo J, Komaki R, Mohan R, Liao Z. Serum TGF-β1 and VEGF Are Associated With Tumor Burden and Tumor Response on PET to (Chemo)radiation Therapy in Patients With Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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143
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Zhang L, Court L, Liao Z, Li H, Mohan R, Balter P. Large Tumor Shrinkage Is Preceded by the Appearance of a Cavity Inside the Tumor for NSCLC Patients Treated With Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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144
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Zhu XR, Poenisch F, Lii M, Sawakuchi GO, Titt U, Bues M, Song X, Zhang X, Li Y, Ciangaru G, Li H, Taylor MB, Suzuki K, Mohan R, Gillin MT, Sahoo N. Commissioning dose computation models for spot scanning proton beams in water for a commercially available treatment planning system. Med Phys 2013; 40:041723. [PMID: 23556893 DOI: 10.1118/1.4798229] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
PURPOSE To present our method and experience in commissioning dose models in water for spot scanning proton therapy in a commercial treatment planning system (TPS). METHODS The input data required by the TPS included in-air transverse profiles and integral depth doses (IDDs). All input data were obtained from Monte Carlo (MC) simulations that had been validated by measurements. MC-generated IDDs were converted to units of Gy mm(2)/MU using the measured IDDs at a depth of 2 cm employing the largest commercially available parallel-plate ionization chamber. The sensitive area of the chamber was insufficient to fully encompass the entire lateral dose deposited at depth by a pencil beam (spot). To correct for the detector size, correction factors as a function of proton energy were defined and determined using MC. The fluence of individual spots was initially modeled as a single Gaussian (SG) function and later as a double Gaussian (DG) function. The DG fluence model was introduced to account for the spot fluence due to contributions of large angle scattering from the devices within the scanning nozzle, especially from the spot profile monitor. To validate the DG fluence model, we compared calculations and measurements, including doses at the center of spread out Bragg peaks (SOBPs) as a function of nominal field size, range, and SOBP width, lateral dose profiles, and depth doses for different widths of SOBP. Dose models were validated extensively with patient treatment field-specific measurements. RESULTS We demonstrated that the DG fluence model is necessary for predicting the field size dependence of dose distributions. With this model, the calculated doses at the center of SOBPs as a function of nominal field size, range, and SOBP width, lateral dose profiles and depth doses for rectangular target volumes agreed well with respective measured values. With the DG fluence model for our scanning proton beam line, we successfully treated more than 500 patients from March 2010 through June 2012 with acceptable agreement between TPS calculated and measured dose distributions. However, the current dose model still has limitations in predicting field size dependence of doses at some intermediate depths of proton beams with high energies. CONCLUSIONS We have commissioned a DG fluence model for clinical use. It is demonstrated that the DG fluence model is significantly more accurate than the SG fluence model. However, some deficiencies in modeling the low-dose envelope in the current dose algorithm still exist. Further improvements to the current dose algorithm are needed. The method presented here should be useful for commissioning pencil beam dose algorithms in new versions of TPS in the future.
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Affiliation(s)
- X R Zhu
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
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Liu W, Mohan R, Zhu X, Grosshans D. TH-C-144-04: Robust Optimization in Intensity-Modulated Proton Therapy for Base-Of-Skull Cancers. Med Phys 2013. [DOI: 10.1118/1.4815798] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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147
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Titt U, Guan F, Mirkovic D, Mohan R. SU-E-T-535: On the Out-Of-Field-Doses Caused by Secondary Particles From Light Ion Beams in Charged Particle Therapy. Med Phys 2013. [DOI: 10.1118/1.4814965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Archambault L, Poenisch F, Sahoo N, Robertson D, Lee A, Gillin MT, Mohan R, Beddar S. Verification of proton range, position, and intensity in IMPT with a 3D liquid scintillator detector system. Med Phys 2013; 39:1239-46. [PMID: 22380355 DOI: 10.1118/1.3681948] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Intensity-modulated proton therapy (IMPT) using spot scanned proton beams relies on the delivery of a large number of beamlets to shape the dose distribution in a highly conformal manner. The authors have developed a 3D system based on liquid scintillator to measure the spatial location, intensity, and depth of penetration (energy) of the proton beamlets in near real-time. METHODS The detector system consists of a 20 × 20 × 20 cc liquid scintillator (LS) material in a light tight enclosure connected to a CCD camera. This camera has a field of view of 25.7 by 19.3 cm and a pixel size of 0.4 mm. While the LS is irradiated, the camera continuously acquires images of the light distribution produced inside the LS. Irradiations were made with proton pencil beams produced with a spot-scanning nozzle. Pencil beams with nominal ranges in water between 9.5 and 17.6 cm were scanned to irradiate an area of 10 × 10 cm square on the surface of the LS phantom. Image frames were acquired at 50 ms per frame. RESULTS The signal to noise ratio of a typical Bragg peak was about 170. Proton range measured from the light distribution produced in the LS was accurate to within 0.3 mm on average. The largest deviation seen between the nominal and measured range was 0.6 mm. Lateral position of the measured pencil beam was accurate to within 0.4 mm on average. The largest deviation seen between the nominal and measured lateral position was 0.8 mm; however, the accuracy of this measurement could be improved by correcting light scattering artifacts. Intensity of single proton spots were measured with precision ranging from 3 % for the smallest spot intensity (0.005 MU) to 0.5 % for the largest spot (0.04 MU). CONCLUSIONS Our LS detector system has been shown to be capable of fast, submillimeter spatial localization of proton spots delivered in a 3D volume. This system could be used for beam range, intensity and position verification in IMPT.
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Affiliation(s)
- L Archambault
- Department of Radiation Physics, The University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
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Matney J, Chen Y, Park P, Li H, Bluett J, Sahoo N, Court L, Liao Z, Mohan R. TH-A-116-03: Photon and Proton Radiotherapy of the Lung Would Benefit From 4D Dose Calculation Techniques. Med Phys 2013. [DOI: 10.1118/1.4815732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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150
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Titt U, Mirkovic D, Mohan R. SU-C-500-04: Three-Dimensional Energy Fluence Estimates for Future Treatment Planning Systems. Med Phys 2013. [DOI: 10.1118/1.4813949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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