Nzhde Agazaryan

Summary

Affiliation: University of California
Country: USA

Publications

  1. doi request reprint Image-guided radiosurgery for spinal tumors: methods, accuracy and patient intrafraction motion
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
    Phys Med Biol 53:1715-27. 2008
  2. ncbi request reprint A methodology for verification of radiotherapy dose calculation
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, California 90095 6951, USA
    J Neurosurg 101:356-61. 2004
  3. ncbi request reprint The effects of tumor motion on planning and delivery of respiratory-gated IMRT
    Geoffrey D Hugo
    Department of Radiation Oncology, UCLA School of Medicine, Los Angeles, California 90095, USA
    Med Phys 30:1052-66. 2003
  4. ncbi request reprint Segmental and dynamic intensity-modulated radiotherapy delivery techniques for micro-multileaf collimator
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095 6951, USA
    Med Phys 30:1758-67. 2003
  5. doi request reprint Dedicated linear accelerator radiosurgery for trigeminal neuralgia: a single-center experience in 179 patients with varied dose prescriptions and treatment plans
    Zachary A Smith
    Department of Neurosurgery, UCLA Medical Center, West Los Angeles Veteran s Administration Hospital, Los Angeles, CA, USA
    Int J Radiat Oncol Biol Phys 81:225-31. 2011
  6. doi request reprint Challenges in linear accelerator radiotherapy for chordomas and chondrosarcomas of the skull base: focus on complications
    Jason S Hauptman
    Division of Stereotactic and Functional Neurosurgery, Department of Neurosurgery, University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA 90095 7039, USA
    Int J Radiat Oncol Biol Phys 83:542-51. 2012
  7. doi request reprint Initial clinical experience with image-guided linear accelerator-based spinal radiosurgery for treatment of benign nerve sheath tumors
    Michael T Selch
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095 6951, USA
    Surg Neurol 72:668-74; discussion 674-5. 2009
  8. ncbi request reprint Stereotactic radiation treatment for recurrent nonbenign meningiomas
    Carlos A Mattozo
    Division of Neurosurgery, University of California at Los Angeles School of Medicine, Los Angeles, California 90095, USA
    J Neurosurg 106:846-54. 2007
  9. ncbi request reprint A feasibility study of 18F-fluorodeoxyglucose positron emission tomography targeting and simultaneous integrated boost for intensity-modulated radiosurgery and radiotherapy
    Timothy D Solberg
    Department of Radiation Oncology, David Geffen School of Medicine, University of California, 90095 6951, USA
    J Neurosurg 101:381-9. 2004
  10. ncbi request reprint Brainstem and trigeminal nerve changes after radiosurgery for trigeminal pain
    Alessandra Gorgulho
    Division of Neurosurgery, David Geffen School of Medicine at UCLA, University of California at Los Angeles, Los Angeles, CA 90095, USA
    Surg Neurol 66:127-35; discussion 135. 2006

Collaborators

Detail Information

Publications23

  1. doi request reprint Image-guided radiosurgery for spinal tumors: methods, accuracy and patient intrafraction motion
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
    Phys Med Biol 53:1715-27. 2008
    ..5 degrees were observed. The small relative rotational movements observed do not, alone, justify patient monitoring using the image-guidance system during the treatments of generally small radiosurgical targets...
  2. ncbi request reprint A methodology for verification of radiotherapy dose calculation
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, California 90095 6951, USA
    J Neurosurg 101:356-61. 2004
    ..Dosimetric accuracy of clinically active intensity-modulated radiotherapy (IMRT) and intensity-modulated radiosurgery (IMRS) programs was assessed using this methodology...
  3. ncbi request reprint The effects of tumor motion on planning and delivery of respiratory-gated IMRT
    Geoffrey D Hugo
    Department of Radiation Oncology, UCLA School of Medicine, Los Angeles, California 90095, USA
    Med Phys 30:1052-66. 2003
    ..The utilization of gating for IMRT treatment, including imaging, planning, and delivery, significantly reduces the errors introduced by object motion...
  4. ncbi request reprint Segmental and dynamic intensity-modulated radiotherapy delivery techniques for micro-multileaf collimator
    Nzhde Agazaryan
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095 6951, USA
    Med Phys 30:1758-67. 2003
    ....
  5. doi request reprint Dedicated linear accelerator radiosurgery for trigeminal neuralgia: a single-center experience in 179 patients with varied dose prescriptions and treatment plans
    Zachary A Smith
    Department of Neurosurgery, UCLA Medical Center, West Los Angeles Veteran s Administration Hospital, Los Angeles, CA, USA
    Int J Radiat Oncol Biol Phys 81:225-31. 2011
    ..Although the use of gamma knife continues to be established, few large series exist using D-LINAC. The authors describe their results, comparing the effects of varied target and dose regimens...
  6. doi request reprint Challenges in linear accelerator radiotherapy for chordomas and chondrosarcomas of the skull base: focus on complications
    Jason S Hauptman
    Division of Stereotactic and Functional Neurosurgery, Department of Neurosurgery, University of California, Los Angeles, David Geffen School of Medicine, Los Angeles, CA 90095 7039, USA
    Int J Radiat Oncol Biol Phys 83:542-51. 2012
    ..Currently, consensus therapy includes surgical resection and adjuvant radiotherapy. Radiation delivery is typically limited by the proximity of these tumors to critical skull base structures...
  7. doi request reprint Initial clinical experience with image-guided linear accelerator-based spinal radiosurgery for treatment of benign nerve sheath tumors
    Michael T Selch
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095 6951, USA
    Surg Neurol 72:668-74; discussion 674-5. 2009
    ..Stereotactic radiosurgery has proven a safe and effective treatment of cranial nerve sheath tumors. A similar approach should be successful for histologically identical spinal nerve sheath tumors...
  8. ncbi request reprint Stereotactic radiation treatment for recurrent nonbenign meningiomas
    Carlos A Mattozo
    Division of Neurosurgery, University of California at Los Angeles School of Medicine, Los Angeles, California 90095, USA
    J Neurosurg 106:846-54. 2007
    ....
  9. ncbi request reprint A feasibility study of 18F-fluorodeoxyglucose positron emission tomography targeting and simultaneous integrated boost for intensity-modulated radiosurgery and radiotherapy
    Timothy D Solberg
    Department of Radiation Oncology, David Geffen School of Medicine, University of California, 90095 6951, USA
    J Neurosurg 101:381-9. 2004
    ....
  10. ncbi request reprint Brainstem and trigeminal nerve changes after radiosurgery for trigeminal pain
    Alessandra Gorgulho
    Division of Neurosurgery, David Geffen School of Medicine at UCLA, University of California at Los Angeles, Los Angeles, CA 90095, USA
    Surg Neurol 66:127-35; discussion 135. 2006
    ..To evaluate the significance of radiological changes on follow-up MRIs after SRS for TN...
  11. ncbi request reprint Stereotactic radiotherapy for the treatment of acoustic neuromas
    Michael T Selch
    Department of Radiation Oncology and Division of Neurosurgery, David Geffen School of Medicine, University of California, 90045 6951, USA
    J Neurosurg 101:362-72. 2004
    ..The authors sought to assess the safety and efficacy of stereotactic radiotherapy when using a linear accelerator equipped with a micromultileaf collimator for the treatment of patients with acoustic neuromas...
  12. pmc Image-guided linear accelerator-based spinal radiosurgery for hemangioblastoma
    Michael T Selch
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
    Surg Neurol Int 3:73. 2012
    ..To retrospectively review the efficacy and safety of image-guided linear accelerator-based radiosurgery for spinal hemangioblastomas...
  13. doi request reprint Treatment of giant cerebral arteriovenous malformation: hypofractionated stereotactic radiation as the first stage
    Furen Xiao
    Division of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, California, USA
    Neurosurgery 67:1253-9; discussion 1259. 2010
    ..Treatment of giant cerebral arteriovenous malformations (AVMs) remains a challenge...
  14. ncbi request reprint An evaluation of gating window size, delivery method, and composite field dosimetry of respiratory-gated IMRT
    Geoffrey D Hugo
    Department of Radiation Oncology, UCLA School of Medicine, Los Angeles, California 90095, USA
    Med Phys 29:2517-25. 2002
    ..For multiple field IMRT delivery, the largest errors were generated in regions where high field modulation was present parallel to the axis of motion. Gating was found to reduce these large errors to clinically acceptable levels...
  15. ncbi request reprint Patient specific quality assurance for the delivery of intensity modulated radiotherapy
    Nzhde Agazaryan
    Department of Radiation Oncology, UCLA School of Medicine, 200 UCLA Medical Plaza, Suite B265, Los Angeles, California 90095 6951, USA
    J Appl Clin Med Phys 4:40-50. 2003
    ..Absolute dosimetry for each composite plan is performed using an ionization chamber. To date, excellent agreement between measurements and calculations has been observed...
  16. ncbi request reprint Spinal lesions treated with Novalis shaped beam intensity-modulated radiosurgery and stereotactic radiotherapy
    Antonio A F De Salles
    Division of Neurosurgery and Department of Radiation Oncology, David Geffen School of Medicine, University of California, Los Angeles, California, USA
    J Neurosurg 101:435-40. 2004
    ..Spinal radiosurgery was implemented to improve quality of life (QOL) in patients with malignancies. It may also be applicable to the treatment of benign lesions...
  17. ncbi request reprint A seed specific dose kernel method for low-energy brachytherapy dosimetry
    John J DeMarco
    Department of Radiation Oncology, UCLA School of Medicine, Los Angeles, California 90095, USA
    J Appl Clin Med Phys 4:66-74. 2003
    ..Good agreement is achieved for a representative pre- and post-plan comparison versus a commercial implementation of the TG-43 brachytherapy dosimetry protocol...
  18. doi request reprint Evaluation of high ipsilateral subventricular zone radiation therapy dose in glioblastoma: a pooled analysis
    Percy Lee
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA
    Int J Radiat Oncol Biol Phys 86:609-15. 2013
    ..Because of their radioresistance, we hypothesized that high doses of radiation (>59.4 Gy) to the SVZ are necessary to control CSCs and improve progression-free survival (PFS) or overall survival (OS) in glioblastoma...
  19. ncbi request reprint Time-course of effects of external beam radiation on [18F]FDG uptake in healthy tissue and bone marrow
    Adam L Kesner
    Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095 6942, USA
    J Appl Clin Med Phys 9:2747. 2008
    ....
  20. doi request reprint Intraoperative ultrasonography-guided positioning of iodine 125 plaque brachytherapy in the treatment of choroidal melanoma
    Melinda Y Chang
    Department of Ophthalmology, University of California, Los Angeles, CA, USA
    Ophthalmology 119:1073-7. 2012
    ..To report intraoperative ultrasonography-guided positioning of iodine 125 (I(125)) plaques for brachytherapy of choroidal melanoma as a quality improvement measure...
  21. pmc Irradiation of the potential cancer stem cell niches in the adult brain improves progression-free survival of patients with malignant glioma
    Patrick Evers
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
    BMC Cancer 10:384. 2010
    ..This suggests that the NSC niches in the brain may harbor cancer stem cells (CSCs), Thus providing novel therapy targets. We hypothesize that higher radiation doses to these NSC niches improve patient survival by eradicating CSCs...
  22. pmc Radiation enhances regulatory T cell representation
    Evelyn L Kachikwu
    Department of Radiation Oncology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095 1714, USA
    Int J Radiat Oncol Biol Phys 81:1128-35. 2011
    ..This study was undertaken to evaluate the impact of radiation therapy (RT) on immunosuppressive T regulatory (Treg) cells...
  23. ncbi request reprint Degeneracy, frequency response and filtering in IMRT optimization
    Jorge Llacer
    EC Engineering Consultants LLC, 130 Forest Hill Drive, Los Gatos, CA 95032, USA
    Phys Med Biol 49:2853-80. 2004
    ..Stopping points for the studied algorithms are discussed and the deterioration of DVH characteristics with filtering is shown to be partially recoverable by the use of space-variant filtering techniques...