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Active, not recruitingNCT02708810Updated Oct 16, 2025

RAD 1501: A Trial of Virtual Cone Trigeminal Neuralgia Radiosurgery

An interventional study of Unframed Virtual Cone and 80 Gy Radiation in Trigeminal Neuralgia, sponsored by University of Alabama at Birmingham. Active, not recruiting at 1 site in United States. Open to participants aged 18 Years to 99 Years. Per ClinicalTrials.gov, last updated 2025-10-16.

Sponsored by University of Alabama at Birmingham · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Not applicable
Ages
18 Years to 99 Years
Sex
All
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Study summary

To determine the feasibility of frameless Virtual Cone trigeminal neuralgia radiosurgery at a single institution prior to multi-institutional enrollment.

Read the detailed description

To determine the feasibility of frameless Virtual Cone trigeminal neuralgia radiosurgery at a single institution prior to multi-institutional enrollment. To measure pain relief after Virtual Cone radiosurgery utilizing the Barrow Neurologic Institute Pain Intensity Score (BNI).

02

Conditions studied

  • Trigeminal Neuralgia

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Keywords

  • radiosurgery (RS)
  • trigeminal neuralgia (TGN)
03

In context

Trigeminal Neuralgia

135 studies on the registry are indexed under Trigeminal Neuralgia; 44 are open to participants now.

This study's enrollment of 40 is close to the median of 40 across 92 interventional studies indexed under Trigeminal Neuralgia.

Browse Trigeminal Neuralgia studies →

Lead sponsor

University of Alabama at Birmingham is the lead sponsor of 1,396 studies on the registry; 284 are open to participants now.

Of its 156 completed or terminated interventional studies of FDA-regulated products, 124 (79%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 99 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients with trigeminal neuralgia pain that is not well controlled despite medical management (BNI 4 OR BNI 5)
  • Patients must have an ECOG status of 0, 1, or 2
  • Patients must be at least 18 years of age
  • Life expectancy must be greater than 12 months
  • MRI of brain within prior 12 months to confirm lack of other causes of facial pain
  • All patients must be given written informed consent

Exclusion criteria

Exclusion Criteria:

  • Patients who have had prior brain radiosurgery or therapeutic radiation therapy to the pons
  • Patients with atypical trigeminal neuralgia or headache pain syndromes
  • Patients with pain associated with multiple sclerosis or base of skull tumor
  • Patients with medical contra-indications to MR imaging (e.g. pacemaker)
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
40 participants (actual)

Study arms

  • Other
    80 Gy Radiation & Unframed Virtual Cone

    80 Gy Virtual Cone Radiosurgery unframed (face mask)

    Device: Unframed Virtual Cone · Radiation: 80 Gy Radiation

Interventions

  • DeviceUnframed Virtual Cone

    A face mask (unframed) will be placed over the patient's face to keep their head from moving during the procedure. This will allow for very precise targeting. During the procedure, the study doctor will also confirm the exact location that needs to be treated using x-rays and optical imaging cameras. The face mask (unframed) will hold the patient's head to prevent it from moving and to focus the x-rays and aim them on the painful nerve in the patient's brain. For most patients, the actual time on the radiosurgery treatment machine is in the range of 30 to 60 minutes. The face mask (unframed) will be removed after the treatment.

    Also known as: Face Mask

  • Radiation80 Gy Radiation

    Also known as: Radiosurgery

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What researchers measure

Primary outcomes

  1. Feasibility of Frameless Virtual Cone Trigeminal Neuralgia Radiosurgery as assessed by number of participants that completed treatment

    Time frame: 3 Month Follow-Up Visit

  2. The mean of Barrow Neurologic Institute Pain Intensity Score (BNI) (pain relief score) between the two arms.

    Pain Relief Score designed to assess trigeminal neuralgia associated pain. It ranges from "I" being "no trigeminal pain, no medication" to "V" being "severe pain/no pain relief".

    Time frame: 1 Year

Secondary outcomes

  1. Number of Participants with treatment-related adverse events

    Based on the assessments of the patient and the responses provided by the patient in questionnaires, we will assess acute and late neurologic toxicities. All adverse events/toxicities will be assessed with the utilization of CTCAE v.4.0.

    Time frame: 1 Year

  2. Mean of Quality of Life Scores as measured by SF-36 Questionnaire

    Quality of Life (QOL) will be measured by SF-36. This questionnaire consists of 36 questions (items) measuring physical and mental health in relation to 8 health concepts: physical functioning, bodily pain, role of limitations due to physical health problems, role of limitations due to personal or emotional problems, emotional well-being, social functioning, energy/fatigue, and general health perception. All items are scored so that a high score defines a more favorable health state. Each item is scored on a 0 to 100 range so that the lowest and highest possible scores are set at 0 and 100, respectively.

    Time frame: 1 Year

  3. Patient Satisfaction Scores

    3 months following the completion of radiosurgery, the patient will be asked the following two questions: 1) Would you have the radiosurgery procedure again? 2) Would you recommend it to friends and family?

    Time frame: 3 Month Follow-Up Visit

07

Study locations

1 site
  • Hazelrig-Salter Radiation Oncology Center
    Birmingham, Alabama 35233, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 16, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02708810
Lead sponsor
University of Alabama at Birmingham
Responsible party
John Fiveash, MD (Principal Investigator, University of Alabama at Birmingham) — Principal investigator
First posted
Mar 15, 2016
Start date
Nov 2015
Primary completion
Oct 1, 2025
Completion
Oct 2026 (estimated)
Last update
Oct 16, 2025

Study contacts

John Fiveash, MD
principal investigator · University of Alabama at Birmingham

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Oct 2025. You cannot join it, but the record below documents what was studied.

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