T C Ryken

Summary

Affiliation: University of Iowa
Country: USA

Publications

  1. ncbi Modification of reference array attachment for image guided neurosurgery: direct cranial fixation
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA
    Technol Cancer Res Treat 1:401-4. 2002
  2. ncbi Evidence-based review of the surgical management of vertebral column metastatic disease
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
    Neurosurg Focus 15:E11. 2003
  3. ncbi Image-based drill templates for cervical pedicle screw placement
    Timothy C Ryken
    Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
    J Neurosurg Spine 10:21-6. 2009
  4. ncbi Engineering patient-specific drill templates and bioabsorbable posterior cervical plates: a feasibility study
    Timothy C Ryken
    Department of Nuerosurgery, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242, USA
    J Neurosurg Spine 10:129-32. 2009
  5. ncbi Ultrasonographic guidance for spinal extracranial radiosurgery: technique and application for metastatic spinal lesions
    T C Ryken
    Department of Neurosurgery, University of Iowa, Iowa City, Iowa 52242 1077, USA
    Neurosurg Focus 11:e8. 2001
  6. ncbi Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility
    T C Ryken
    Department of Neurosurgery, University of Iowa College of Medicine, Iowa City, IA, USA
    Int J Radiat Oncol Biol Phys 51:1152-8. 2001
  7. ncbi Rapid prototype patient-specific drill template for cervical pedicle screw placement
    Brent D Owen
    Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
    Comput Aided Surg 12:303-8. 2007
  8. ncbi Effect of specimen fixation method on pullout tests of pedicle screws
    M Pfeiffer
    Iowa Spine Research Center, University of Iowa, Iowa City, USA
    Spine (Phila Pa 1976) 21:1037-44. 1996
  9. ncbi Fluid-attenuated inversion-recovery MR imaging in assessment of intracranial oligodendrogliomas
    Matthew L White
    Department of Radiology, University of Iowa College of Medicine, Iowa City, IA 52242 1077, USA
    Comput Med Imaging Graph 29:279-85. 2005
  10. ncbi Can tumor contrast enhancement be used as a criterion for differentiating tumor grades of oligodendrogliomas?
    Matthew L White
    Department of Radiology, University of Iowa College of Medicine, Iowa City, IA 52242, USA
    AJNR Am J Neuroradiol 26:784-90. 2005

Collaborators

Detail Information

Publications42

  1. ncbi Modification of reference array attachment for image guided neurosurgery: direct cranial fixation
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA
    Technol Cancer Res Treat 1:401-4. 2002
    ..The successful application of the modified system to two operative cases is described...
  2. ncbi Evidence-based review of the surgical management of vertebral column metastatic disease
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
    Neurosurg Focus 15:E11. 2003
    ..The purpose of this review was to determine the foundation in the literature of views favoring surgical intervention for spinal metastatic disease...
  3. ncbi Image-based drill templates for cervical pedicle screw placement
    Timothy C Ryken
    Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
    J Neurosurg Spine 10:21-6. 2009
    ..The goal of the study was to assess the accuracy of a drill template in the placement of cervical PSs at a single vertebral level...
  4. ncbi Engineering patient-specific drill templates and bioabsorbable posterior cervical plates: a feasibility study
    Timothy C Ryken
    Department of Nuerosurgery, University of Iowa Carver College of Medicine, Iowa City, Iowa 52242, USA
    J Neurosurg Spine 10:129-32. 2009
    ..In this study, the authors explore the use of computer-generated templates and introduce their methods for creating custom, bioabsorbable posterior cervical implants...
  5. ncbi Ultrasonographic guidance for spinal extracranial radiosurgery: technique and application for metastatic spinal lesions
    T C Ryken
    Department of Neurosurgery, University of Iowa, Iowa City, Iowa 52242 1077, USA
    Neurosurg Focus 11:e8. 2001
    ..In this report the authors describe this technique as applied to the treatment of localized metastatic spinal disease...
  6. ncbi Initial clinical experience with frameless stereotactic radiosurgery: analysis of accuracy and feasibility
    T C Ryken
    Department of Neurosurgery, University of Iowa College of Medicine, Iowa City, IA, USA
    Int J Radiat Oncol Biol Phys 51:1152-8. 2001
    ..CONCLUSION: Our initial clinical experience with stereotactic radiotherapy using the infrared camera guidance system was promising, demonstrating clinical feasibility and accuracy comparable to many frame-based systems...
  7. ncbi Rapid prototype patient-specific drill template for cervical pedicle screw placement
    Brent D Owen
    Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
    Comput Aided Surg 12:303-8. 2007
    ..To assess the feasibility and accuracy of a drill template for the placement of a cervical pedicle screw in a single vertebral level...
  8. ncbi Effect of specimen fixation method on pullout tests of pedicle screws
    M Pfeiffer
    Iowa Spine Research Center, University of Iowa, Iowa City, USA
    Spine (Phila Pa 1976) 21:1037-44. 1996
    ..g., with a latex wrapping) or document post-test (e.g., through the methods described in this article) that intrusion did not occur for the specimens included in the analysis...
  9. ncbi Fluid-attenuated inversion-recovery MR imaging in assessment of intracranial oligodendrogliomas
    Matthew L White
    Department of Radiology, University of Iowa College of Medicine, Iowa City, IA 52242 1077, USA
    Comput Med Imaging Graph 29:279-85. 2005
    ..Our results demonstrate that the FLAIR sequence can replace the T2-weighted FSE sequence for evaluating oligodendrogliomas...
  10. ncbi Can tumor contrast enhancement be used as a criterion for differentiating tumor grades of oligodendrogliomas?
    Matthew L White
    Department of Radiology, University of Iowa College of Medicine, Iowa City, IA 52242, USA
    AJNR Am J Neuroradiol 26:784-90. 2005
    ..Some authors have even used contrast enhancement as a criterion for their oligodendroglioma grading system. The purpose of our study was to evaluate if tumor contrast enhancement is a specific finding for anaplastic oligodendroglioma...
  11. ncbi Complications of revision spinal surgery
    Kurt M Eichholz
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA
    Neurosurg Focus 15:E1. 2003
    ..The prognosis for a revision surgery can be predicted best by the patient's outcome after the primary surgery. As with any surgical procedure, patient selection is imperative for successful outcome...
  12. ncbi The role of retreatment in the management of recurrent/progressive brain metastases: a systematic review and evidence-based clinical practice guideline
    Mario Ammirati
    Department of Neurosurgery, Ohio State University Medical Center, Columbus, OH, USA
    J Neurooncol 96:85-96. 2010
    ..What evidence is available regarding the use of whole brain radiation therapy (WBRT), stereotactic radiosurgery (SRS), surgical resection or chemotherapy for the treatment of recurrent/progressive brain metastases?..
  13. ncbi Image-guided stereotactic radiosurgery using a specially designed high-dose-rate linac
    John E Bayouth
    Department of Radiation Oncology, Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
    Med Dosim 32:134-41. 2007
    ..5 mm for extracranial applications. Because stereotactic IGRT can require significantly longer times for treatment delivery, the advantages of the high-dose-rate design and its direct impact on IGRT are discussed...
  14. ncbi Ultrasound-guided extracranial radiosurgery: technique and application
    Sanford L Meeks
    Department of Radiation Oncology, University of Iowa, Iowa City, IA 52242, USA
    Int J Radiat Oncol Biol Phys 55:1092-101. 2003
    ..In this paper, we describe the system and its initial clinical application in the treatment of localized metastatic disease...
  15. ncbi Radiotoxicity after conformal radiation therapy for benign intracranial tumors
    Mark C Smith
    Department of Radiation Oncology, Holden Comprehensive Cancer Center, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USA
    Neurosurg Clin N Am 17:169-80, vii. 2006
    ..This article reviews radiotoxicity after conformal radiation therapy for acoustic schwannomas, skull base meningiomas, and pituitary adenomas...
  16. ncbi Assessment of unicortical and bicortical fixation in a quasistatic cadaveric model. Role of bone mineral density and screw torque
    T C Ryken
    Division of Neurosurgery, University of Iowa, Iowa City, USA
    Spine (Phila Pa 1976) 20:1861-7. 1995
    ..RESULTS. Unicortical screw placement resulted in inadequate stabilization in half of the cervical specimens. CONCLUSIONS. Our results suggest that, for the Caspar screw, bicortical fixation provides greater flexion-extension stability...
  17. ncbi Human astrocytomas co-expressing Fas and Fas ligand also produce TGFbeta2 and Bcl-2
    B Frankel
    Department of Neurosurgery, SUNY Health Science Center at Syracuse, NY 13210, USA
    J Neurooncol 44:205-12. 1999
    ..002) and Bcl-2 (p < 0.005) production. We conclude that Fas and FasL are frequently co-expressed in human astrocytomas and these tumors are likely to produce other immunosuppressive and antiapoptotic factors such as TGFbeta2 and Bcl-2...
  18. ncbi The role of surgical resection in the management of newly diagnosed brain metastases: a systematic review and evidence-based clinical practice guideline
    Steven N Kalkanis
    Department of Neurosurgery, Henry Ford Health System, 2799 West Grand Blvd, K 11, Detroit, MI 48202, USA
    J Neurooncol 96:33-43. 2010
    ..There is insufficient evidence to make a recommendation for patients with poor performance scores, advanced systemic disease, or multiple brain metastases...
  19. ncbi The role of stereotactic radiosurgery in the management of patients with newly diagnosed brain metastases: a systematic review and evidence-based clinical practice guideline
    Mark E Linskey
    Department of Neurosurgery, University of California Irvine Medical Center, Orange, CA, USA
    J Neurooncol 96:45-68. 2010
    ....
  20. ncbi Trends in brain cancer incidence and survival in the United States: Surveillance, Epidemiology, and End Results Program, 1973 to 2001
    Sundeep Deorah
    Department of Epidemiology, College of Public Health, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
    Neurosurg Focus 20:E1. 2006
    ..The incidence rate of brain cancer in the US is gradually declining, but the rising trend of GBM combined with its poor survival rate is disconcerting and needs further exploration...
  21. ncbi The role of emerging and investigational therapies for metastatic brain tumors: a systematic review and evidence-based clinical practice guideline of selected topics
    Jeffrey J Olson
    Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, USA
    J Neurooncol 96:115-42. 2010
    ..What evidence is available regarding the emerging and investigational therapies for the treatment of metastatic brain tumors?..
  22. ncbi Tumor Fas (APO-1/CD95) up-regulation results in increased apoptosis and survival times for rats with intracranial malignant gliomas
    B Frankel
    Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse 13210, USA
    Neurosurgery 49:168-75; discussion 175-6. 2001
    ..However, little is known regarding the effects of Fas expression on glioma viability in vivo. The goal of this study was to clarify the relationships among Fas expression, apoptosis, and survival rates for high-grade astrocytomas...
  23. ncbi Techniques for cervical interbody grafting
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
    J Neurosurg Spine 11:203-20. 2009
    ..The objective of this systematic review was to use evidence-based medicine to determine the efficacy of interbody graft techniques...
  24. ncbi Management of newly diagnosed glioblastoma: guidelines development, value and application
    Jeffrey J Olson
    Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA 30322, USA
    J Neurooncol 93:1-23. 2009
    ....
  25. ncbi Cervical surgical techniques for the treatment of cervical spondylotic myelopathy
    Praveen V Mummaneni
    Department of Neurosurgery, University of California at San Francisco, California, USA
    J Neurosurg Spine 11:130-41. 2009
    ..The objective of this systematic review was to use evidence-based medicine to compare the efficacy of different surgical techniques for the treatment of cervical spondylotic myelopathy (CSM)...
  26. ncbi Cervical laminectomy for the treatment of cervical degenerative myelopathy
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
    J Neurosurg Spine 11:142-9. 2009
    ..The objective of this systematic review was to use evidence-based medicine to examine the efficacy of cervical laminectomy for the treatment of cervical spondylotic myelopathy (CSM)...
  27. ncbi Cervical laminoforaminotomy for the treatment of cervical degenerative radiculopathy
    Robert F Heary
    Department of Neurosurgery, University of Medicine and Dentistry of New Jersey New Jersey Medical School, Newark, New Jersey, USA
    J Neurosurg Spine 11:198-202. 2009
    ..The objective of this systematic review was to use evidence-based medicine to examine the efficacy of posterior laminoforaminotomy in the treatment of cervical radiculopathy...
  28. ncbi Initial clinical experience with frameless radiosurgery for patients with intracranial metastases
    Reena Kamath
    Department of Radiation Oncology, University of Iowa College of Medicine, Iowa City, IA, USA
    Int J Radiat Oncol Biol Phys 61:1467-72. 2005
    ..Practical noninvasive delivery makes treatment and potential retreatment to avoid WBRT more feasible...
  29. ncbi The role of steroids in the management of brain metastases: a systematic review and evidence-based clinical practice guideline
    Timothy C Ryken
    Department of Neurosurgery, Iowa Spine and Brain Institute, Iowa City, IA, USA
    J Neurooncol 96:103-14. 2010
    ..2) comparison of different doses of steroid therapy...
  30. ncbi Protracted radiotherapy treatment duration in medulloblastoma
    Arnold C Paulino
    Department of Radiation Oncology, The University of Iowa, College of Medicine and Children s Hospital of Iowa, Iowa City, Iowa, USA
    Am J Clin Oncol 26:55-9. 2003
    ....
  31. ncbi Enhanced anatomic visualization with ultrasound-assisted intracranial image-guidance in neurosurgery
    Alexandre M N Marinho
    Department of Neurosurgery, University of Iowa, 200 Hawkins Drive, Iowa City, Iowa 52242, USA
    Technol Cancer Res Treat 1:181-6. 2002
    ..The accuracy of navigation depends on the identification of the anatomic structures. Despite some limitations of the ultrasound images, the ability to compare preoperative MRI and intraoperative ultrasound proved useful to the surgeon...
  32. ncbi Atypical teratoid/rhabdoid tumor case report: treatment with surgical excision, radiation therapy, and alternative medicines
    Terese L Howes
    Department of Radiation Oncology, University of Iowa Hospitals and Clinics, W 189 Z GH, Iowa City, IA 52242, USA
    J Neurooncol 72:85-8. 2005
    ..The patient has been maintained on an extensive regimen of alternative therapies since completion of radiation therapy...
  33. ncbi Radiation therapy of pathologically confirmed newly diagnosed glioblastoma in adults
    John Buatti
    Department of Radiation Oncology, University of Iowa, Iowa City, IA, USA
    J Neurooncol 89:313-37. 2008
  34. ncbi Radiation induced adult medulloblastoma: a case report
    Terese L Howes
    Department of Radiation Oncology, University of Iowa Health Care, W189Z General Hospital, Iowa City, IA 52242, USA
    J Neurooncol 80:191-4. 2006
    ..This is the first reported case of radiation induced adult medulloblastoma...
  35. ncbi Anatomic visualization with ultrasound-assisted intracranial image guidance in neurosurgery: a report of 30 patients
    Wilson Z Ray
    Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
    J Am Coll Surg 199:338-43. 2004
  36. ncbi Genome-wide analysis of epigenetic silencing identifies BEX1 and BEX2 as candidate tumor suppressor genes in malignant glioma
    Greg Foltz
    Neurogenomic Research Laboratory, Department of Neurosurgery, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
    Cancer Res 66:6665-74. 2006
    ....
  37. ncbi Surgical management of newly diagnosed glioblastoma in adults: role of cytoreductive surgery
    Timothy C Ryken
    Department of Neurosurgery, University of Iowa College of Medicine, Iowa City, IA, USA
    J Neurooncol 89:271-86. 2008
  38. ncbi Genetic characterization of commonly used glioma cell lines in the rat animal model system
    Zita A Sibenaller
    Department of Neurosurgery, University of Iowa Hospitals, Iowa City, Iowa 52242, USA
    Neurosurg Focus 19:E1. 2005
    ....
  39. ncbi Low-grade gliomas: answering one question in a myriad of new questions
    John M Buatti
    J Clin Oncol 20:2223-4. 2002
  40. ncbi Management of malignant glioma: steady progress with multimodal approaches
    Lynn S Ashby
    Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
    Neurosurg Focus 20:E3. 2006
    ..Future treatment strategies may include a wide variety of biological response modifiers, but will need to continue to address local control with surgery, radiation, and adjuvant chemotherapy...
  41. ncbi Guidelines for the management of acute cervical spine and spinal cord injuries
    Mark N Hadley
    University of Alabama/Neurosurgery, Birmingham, Alabama, USA
    Clin Neurosurg 49:407-98. 2002
  42. ncbi Diagnosis of malignant glioma: role of neuropathology
    Daniel J Brat
    Department of Pathology and Laboratory Medicine, Emory University Hospital, G-169, 1364 Clifton Rd. NE, Atlanta, GA 30322, USA
    J Neurooncol 89:287-311. 2008