An evaluation of the ICON® mask fixation: Curing characteristics of the thermoplastic fixation and implications for patient workflow.

  • Samendra Prasad University of Virginia, School of Engineering and Applied Sciences, Charlottesville, VA Roswell Park Cancer Institute, Buffalo, NY
  • Matthew Podgorsak Roswell Park Cancer Institute Elm and Carlton Streets, Buffalo, NY USA Jacobs School of Medicine and Biological Sciences, Buffalo, NY
  • Robert Plunkett Department of Neurosurgery, Roswell Park Cancer Institute, Buffalo, NY Department of Neurosurgery, Jacobs School of Medicine and Biological Sciences, Buffalo, NY
  • Dheerendra Prasad Roswell Park Cancer Institute Elm and Carlton Streets, Buffalo, NY USA Jacobs School of Medicine and Biological Sciences, Buffalo, NY http://orcid.org/0000-0002-6615-4235

Abstract

Thermoplastic mask immobilization is used to perform hypo-fractionated treatments with the Gamma Knife ICON®. We evaluated the curing characteristics of the ICON® Nanor mask using force sensing resistors coupled with a data logging tool designed by us. For patients being treated with masks made the same day as the treatment, often in the same sitting with no removal and replacement of the patient from the treatment cradle, based on the curves 80% of the force of fixation is reached at 30 minutes. Allowing for curing over 10-15 minutes and the subsequent localizing and delivery CBCTs as well as the plan evaluation this is a reasonable time to start of therapy. For more exacting targets that are still requiring hypo-fractionation a cure period of 15 hours or greater will ensure that maximum rigidity of fixation is achieved.

Author Biographies

Samendra Prasad, University of Virginia, School of Engineering and Applied Sciences, Charlottesville, VA Roswell Park Cancer Institute, Buffalo, NY
Engineering Undergraduate
Matthew Podgorsak, Roswell Park Cancer Institute Elm and Carlton Streets, Buffalo, NY USA Jacobs School of Medicine and Biological Sciences, Buffalo, NY
Director of Medical Physics
Dheerendra Prasad, Roswell Park Cancer Institute Elm and Carlton Streets, Buffalo, NY USA Jacobs School of Medicine and Biological Sciences, Buffalo, NY

Medical Director, Department of Radiation Medicine, 
Professor of Radiation Medicine, Neurosurgery and Oncology

Director Gamma Knife Center
Director, CNS and Pediatric Radiation Medicine
Published
2018-05-23
How to Cite
Prasad, S., Podgorsak, M., Plunkett, R., & Prasad, D. (2018). An evaluation of the ICON® mask fixation: Curing characteristics of the thermoplastic fixation and implications for patient workflow. Radiology and Oncology, 52(2). Retrieved from https://www.radioloncol.com/index.php/ro/article/view/2922
Section
Medical Physics