76
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Stewart J, Lindsay P, Jaffray D. MO-G-BRB-05: Quantitative Evaluation of Non-Uniform Dose Patterns for Preclinical Radiobiology Studies. Med Phys 2011. [DOI: 10.1118/1.3613056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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77
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Bootsma G, Verhaegen F, Jaffray D. SU-E-I-116: Spatial Frequency Spectrum of the X-Ray Scatter Distribution in CBCT. Med Phys 2011. [DOI: 10.1118/1.3611690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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78
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Yeung I, Haider M, Gonzalez N, Kim S, Coolens C, Yeung T, Driscoll B, Jaffray D. SU-E-I-41: The DCE Tool: A Freeware Analysis Tool for DCE CT and MR Studies. Med Phys 2011. [DOI: 10.1118/1.3611614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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79
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Letourneau D, Wang A, Homer P, Nurul A, Norrlinger B, Jaffray D. SU-C-224-12: Automated Quality Assurance System for Linear Accelerators. Med Phys 2011. [DOI: 10.1118/1.3611460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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80
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Siddique S, Fiume E, Jaffray D. TH-E-220-09: Dose Reduction in X-Ray Fluoroscopic Tracking via Online Exposure Modulation. Med Phys 2011. [DOI: 10.1118/1.3613616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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81
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Weersink R, Qiu J, Daly M, Cho J, Breen S, Hope A, Sharpe M, Jaffray D. WE-E-BRC-04: Quantitative Endoscopy for Improved Target Delineation in Planning Radiation Therapy. Med Phys 2011. [DOI: 10.1118/1.3613382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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82
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Hoisak J, Menard C, Jaffray D. 470 poster A MULTI-PARAMETRIC CHANGE ANALYSIS METHODOLOGY FOR QUANTIFYING TUMOUR CHANGE AND ASSESSING VOXEL CORRESPONDENCE QUALITY. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70592-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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83
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Coolens C, Wee W, Driscoll B, Jaffray D. 1293 poster NOVEL METHODOLOGY FOR VISUALIZATION AND ANALYSIS OF 4D FUNCTIONAL CT. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)71415-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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84
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Jaffray D. 142 speaker INTENSITY MODULATED CT. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70264-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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85
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Rink A, Jaffray D, Menard C. 699 poster BENEFIT OF DUAL IMPLANT VS. SINGLE IMPLANT STRATEGY IN TWO-FRACTION HDR BRACHYTHERAPY FOR PROSTATE CANCER. Radiother Oncol 2011. [DOI: 10.1016/s0167-8140(11)70821-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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86
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Tan YF, Rosenzweig S, Jaffray D, Wojtowicz JM. Depletion of new neurons by image guided irradiation. Front Neurosci 2011; 5:59. [PMID: 21541259 PMCID: PMC3083759 DOI: 10.3389/fnins.2011.00059] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 04/07/2011] [Indexed: 01/25/2023] Open
Abstract
Ionizing radiation continues to be a relevant tool in both imaging and the treatment of cancer. Experimental uses of focal irradiation have recently been expanded to studies of new neurons in the adult brain. Such studies have shown cognitive deficits following radiation treatment and raised caution as to possible unintentional effects that may occur in humans. Conflicting outcomes of the effects of irradiation on adult neurogenesis suggest that the effects are either transient or permanent. In this study, we used an irradiation apparatus employed in the treatment of human tumors to assess radiation effects on rat neurogenesis. For subjects we used adult male rats (Sprague-Dawley) under anesthesia. The irradiation beam was directed at the hippocampus, a center for learning and memory, and the site of neurogenic activity in adult brain. The irradiation was applied at a dose-rate 0.6 Gy/min for total single-fraction, doses ranging from 0.5 to 10.0 Gy. The animals were returned to home cages and recovered with no sign of any side effects. The neurogenesis was measured either 1 week or 6 weeks after the irradiation. At 1 week, the number of neuronal progenitors was reduced in a dose-dependent manner with the 50% reduction at 0.78 Gy. The dose–response curve was well fitted by a double exponential suggesting two processes. Examination of the tissue with quantitative immunohistochemistry revealed a dominant low-dose effect on neuronal progenitors resulting in 80% suppression of neurogenesis. This effect was partially reversible, possibly due to compensatory proliferation of the remaining precursors. At higher doses (>5 Gy) there was additional, nearly complete block of neurogenesis without compensatory proliferation. We conclude that notwithstanding the usefulness of irradiation for experimental purposes, the exposure of human subjects to doses often used in radiotherapy treatment could be damaging and cause cognitive impairments.
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87
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Chung C, Foltz W, Lindsay P, Burrell K, Kallehauge J, Wildgoose P, Camphausen K, Jaffray D, Zadeh G, Menard C. Intracranial Murine Tumor Investigation of Radiation and Antiangiogenic Agents using Serial MRI. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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88
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Coolens C, Wee W, Driscoll B, Jaffray D. Novel Methodology for Visualization and Analysis of Functional Vasculature for 4D DCE-CT. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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89
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Chow J, Lindsay P, Leung M, Jaffray D. Poster - Thur Eve - 17: Effect of Heterogeneities Due to Kilo-Voltage Photon Beam Energy in Small-Animal Irradiation: A Monte Carlo Evaluation. Med Phys 2010. [DOI: 10.1118/1.3476122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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90
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Weersink R, Qiu J, Daly M, Cho BCJ, Breen S, Hope A, DaCosta R, Jaffray D. Sci-Sat AM(1): Planning - 12: Quantitative Endoscopy for Improved Target Delineation in Planning Intensity Modulated Radiation Therapy for Head and Neck Cancer. Med Phys 2010. [DOI: 10.1118/1.3476212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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91
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Ruschin M, Craig T, Nayebi N, Li W, Tamerou M, Cho YB, Ménard C, Jaffray D. Sci-Sat AM(1): Planning - 08: Estimating Planning Target Volume Margins for Fractionated Stereotactic Radiotherapy on Perfexion. Med Phys 2010. [DOI: 10.1118/1.3476208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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92
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Nayebi N, Ruschin M, Nordström H, Johansson J, Eriksson M, Kjäll P, Jaffray D. SU-GG-T-525: Quantification of the Peripheral Dose Components in Perfexion. Med Phys 2010. [DOI: 10.1118/1.3468922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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93
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Bartolac S, Graham S, Siewerdsen J, Jaffray D. TU-A-201B-01: An Inverse Planning Method for Intensity Modulated Computed Tomography. Med Phys 2010. [DOI: 10.1118/1.3469175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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94
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Mail N, Moseley D, Jaffray D. WE-E-201B-04: Parameterization of Scatter Dependent Artifacts in Cone-Beam CT. Med Phys 2010. [DOI: 10.1118/1.3469450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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95
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Siddique S, Fiume E, Jaffray D. SU-GG-J-18: Robust Tracking of Fiducials and Interventional Tools during Image-Guided Interventions. Med Phys 2010. [DOI: 10.1118/1.3468241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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96
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Nayebi N, Ruschin M, Li W, Ménard C, Sahgal A, Jaffray D. WE-C-BRA-01: Evaluation of Inter-Fraction Setup Uncertainty of the Cervical Spine Using a Novel Relocatable Head Frame Intended for Intra-Cranial Stereotactic Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3469363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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97
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Islam M, Norrlinger B, Heaton R, Wilson G, Wang Y, Jaffray D. SU-DD-A1-06: Improving Patient Safety through a Simple Independent On-Line Beam Monitoring System. Med Phys 2010. [DOI: 10.1118/1.3467987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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98
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Bootsma G, Verhaegen F, Jaffray D. TH-D-201B-05: Monte Carlo Simulations of the Effects of Bowtie Filtration on X-Ray Scatter in Cone-Beam CT. Med Phys 2010. [DOI: 10.1118/1.3469564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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99
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Yin F, Wong J, Jaffray D. TH-A-BRA-03: TG-104: In-Room kV Imaging for IGRT. Med Phys 2010. [DOI: 10.1118/1.3469462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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100
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Zheng J, Allen C, Jaffray D. 64 poster: CT/MR Contrast Agent for Longitudinal Localization and Delineation of Target Structures in Image-Guided Radiotherapy. Radiother Oncol 2010. [DOI: 10.1016/s0167-8140(15)34483-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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