3D Printed Mask for GBM and Brain Mets

• ClinicalTrials.gov Identifier: NCT04114786
• Recruitment Status: Recruiting
• First Posted: October 3, 2019
• Last Update Posted: October 6, 2021
• Sponsor: University Health Network, Toronto
• Information provided by (Responsible Party): University Health Network, Toronto

Tracking Information

• First Submitted Date: July 25, 2019
• First Posted Date: October 3, 2019
• Last Update Posted Date: October 6, 2021
• Actual Study Start Date: September 26, 2019
• Estimated Primary Completion Date: April 2022 (Final data collection date for primary outcome measure)

Current Primary Outcome Measures (submitted: October 1, 2019)

• Treatment planning time [ Time Frame: Baseline to week 1 ]
  Overall treatment planning time: from planning MRI acquisition to first treatment session delivery.
• 3D-mask confection time [ Time Frame: Baseline to week 1 ]
  3D-mask confection time during radiation therapy
• Inter- and intra-fraction motion [ Time Frame: Baseline to week one ]
  Inter- and intra-fraction motion during radiation therapy
• Patient reported adverse events and tolerability of mask [ Time Frame: First scan through to end of radiation treatment, an average 8 weeks ]
  CT-simulation, first and last week of radiation treatment

• Original Primary Outcome Measures: Same as current

Current Secondary Outcome Measures (submitted: October 1, 2019)

Gamma values and histograms for MRI-based plans [ Time Frame: First scan through to end of radiation treatment, an average 8 weeks ]

Gamma values and histograms for MRI-based plans of Planning MRI and Radiation treatment

• Original Secondary Outcome Measures: Same as current
• Current Other Pre-specified Outcome Measures: Not Provided
• Original Other Pre-specified Outcome Measures: Not Provided

Descriptive Information

• Brief Title: 3D Printed Mask for GBM and Brain Mets
• Official Title: MRI-based Immobilization and Planning: A Feasibility Study of a Novel Inverse Method for CNS Radiotherapy

Brief Summary

This is a single site, investigator initiated study that aims to explore the feasibility of using a personalized 3D printed immobilization mask for CNS patients undergoing radiation therapy.

For the purpose of this study, patients will undergo the standard CT SIM, and MR SIM necessary for radiation therapy, creating the masks from the MRIs. Prior to the start of their treatment, patients will have an additional CT scan with the 3D printed mask to confirm safety and treatment accuracy. Patients will then proceed with their standard radiation therapy, immobilized with the mask. There will be a control group that will be treated with the standard thermoplastic mask, as a comparison measure. Both groups will complete a mask tolerability questionnaire throughout the course of their treatment to capture the level of discomfort patients may feel with either masks.

Detailed Description

All patients referred for radiotherapy have had a previous diagnostic imaging study (CT-scan or more commonly MRI) showing the disease at the central nervous system (CNS). Moreover, after surgical biopsy or resection, many Centers perform repeated post-operative imaging. Despite all prior imaging, when radiotherapy treatment is decided, all patients undergo another imaging study (CT simulation [CT-sim]) in which patient's head is placed in a reproducible position, and endure a moulding procedure to create a personalized plastic mask for securing the patient's head in a fixed position during the CT acquisition, and reproduced at the subsequent radiation treatment sessions. Typical wait times between moulding, CT-sim and the first radiation treatment is 3-7 days. If a method would be available to accurately recreate the patient's position during diagnostic imaging and reproduce it during radiation treatments without the need for a moulding session or CT-sim, the treatment process can be streamlined and wait times shortened for patients.

Previous studies using 3D printing technology in radiotherapy (such as brachytherapy applicators) have shown that these employed materials are safe for use in clinical settings, and 3D printers can accurately produce devices of various shapes and sizes for clinical use.

In this study, we propose a novel workflow in which patient's position at diagnostic imaging is reproduced with a 3D-printed patient-specific immobilization device, enabling the use of the same diagnostic imaging for planning purposes in lieu of dedicated simulation and moulding sessions, to decrease wait times for patients between diagnostic imaging and start of radiation treatment.

• Study Type: Interventional
• Study Phase: Not Applicable
• Study Design: Allocation: Non-Randomized; Intervention Model: Parallel Assignment; Masking: None (Open Label); Primary Purpose: Diagnostic
• Condition: Brain Cancer

Intervention

• Device: 3D-printed mask
  After patient is enrolled to the study, patients will have CT Sim. MR Sim (used to create 3D printed mask for intervention arm only) CT sim repeat (for intervention arm only) before start of radiation Patients will be asked to fill out a questionnaire after each CT Scan, and during the first and last week of radiation treatment
• Device: Thermoplastic mask
  Patients will undergo standard of care simulation, planning and treatment with conventional workflow using thermoplastic mask.They will complete the tolerability questionnaire after CT-sim, and towards the end of the first and last week of treatment.

Study Arms

• Experimental: 3D-printed mask
  Patients will undergo the standard CT SIM, and MR SIM necessary for radiation therapy, creating the masks from the MRIs. Prior to the start of their treatment, patients will have an additional CT scan with the 3D printed mask to confirm safety and treatment accuracy. Patients will then proceed with their standard radiation therapy, immobilized with the mask.The group will complete a mask tolerability questionnaire throughout the course of their treatment to capture the level of discomfort patients may feel with either masks.
  Intervention: Device: 3D-printed mask
• Active Comparator: Control group
  Control group that will be treated with the standard thermoplastic mask, as a comparison measure. The group will complete a mask tolerability questionnaire throughout the course of their treatment to capture the level of discomfort patients may feel with either masks.
  Intervention: Device: Thermoplastic mask

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Recruiting
• Estimated Enrollment (submitted: October 1, 2019): 50
• Original Estimated Enrollment: Same as current
• Estimated Study Completion Date: April 2022
• Estimated Primary Completion Date: April 2022 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

• Age >18 years
• Patient with high-grade glioma considered for external beam radiotherapy (15 fractions or more) with or without Temozolamide, or patients with brain metastases considered for fractionated LINAC-based external beam radiotherapy (5 fractions or more) as primary or adjuvant treatment.
• No contraindications to MRI
• No other medical conditions deemed by the PI to make patient ineligible for the study (i.e. claustrophobia, confusion, delirium).

Exclusion Criteria:

• None

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 18 Years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Contacts

Contact: Alejandro Berlin, MD; 416-946-4501 ext 5813; alejandro.berlin@rmp.uhn.ca

• Listed Location Countries: Canada

Administrative Information

• NCT Number: NCT04114786
• Other Study ID Numbers: 18-5753
• Has Data Monitoring Committee: No

U.S. FDA-regulated Product

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

IPD Sharing Statement

• Plan to Share IPD: No

• Responsible Party: University Health Network, Toronto
• Study Sponsor: University Health Network, Toronto
• Collaborators: Not Provided

Investigators

• Principal Investigator: Alejandro Berlin, <D; Princess Margaret

• PRS Account: University Health Network, Toronto
• Verification Date: October 2021