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18F-DOPA-PET/MRI Scan in Imaging Elderly Patients With Newly Diagnosed Grade IV Malignant Glioma or Glioblastoma During Planning For a Short Course of Proton Beam Radiation Therapy

Study Purpose

This phase II trial studies how well fluorodopa F 18-positron emission tomography/magnetic resonance imaging scan (18F-DOPA-PET/MRI) works in imaging elderly patients with newly diagnosed grade IV malignant glioma or glioblastoma during planning for a short course of proton beam radiation therapy. 18F-DOPA is a chemical tracer that highlights certain cells during imaging. PET scan, is a metabolic imaging technique which takes advantage of how tumor cells take up nutrients differently than normal tissue. MRI scans are used to guide radiation therapy for most brain tumors. Hypofractionated proton beam therapy delivers higher doses of radiation therapy over a shorter period of time and may kill more tumor cells and have fewer side effects. Using 18FDOPA-PET scans along with MRI scans may be able to provide the radiation doctor with information on tumor tissue versus normal, healthy tissue and may help the doctor more accurately plan the radiation treatment.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 70 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Histologically confirmed newly diagnosed grade IV malignant glioma - Planned radiation treatments at Mayo Clinic Arizona or Mayo Clinic Rochester - Willing to sign release of information for any radiation and/or follow-up records - Provide informed written consent - Patients with estimated glomerular filtration rate (eGFR) >= 60 mg/min/1.72 m^2 - Ability to complete questionnaire(s) by themselves or with assistance - Eastern Cooperative Oncology Group (ECOG) performance status 0, 1, 2

    Exclusion Criteria:

    - Patients diagnosed with grades I-III glioma - Currently on avastin at time of treatment - Unable to undergo MRI scans with contrast (e.g. cardiac pacemaker, defibrillator, kidney failure) - Unable to undergo an 18F-DOPA-PET scan (e.g. Parkinson?s disease, taking antidopaminergic, or dopamine agonist medication or less than 6 half-lives from discontinuance of dopamine agonists) - NOTE: Other potentially interfering drugs: amoxapine, amphetamine, benztropine, buproprion, buspirone, cocaine, mazindol, methamphetamine, methylphenidate, norephedrine, phentermine, phenylpropanolamine, selegiline, paroxetine, citalopram, and sertraline.
If a patient is on any of these drugs, list which ones on the on-study form
  • - Pregnant women, nursing women, or men or women of childbearing potential who are unwilling to employ adequate contraception.
  • - NOTE: All women enrolled in this study will be age 70 or over, and at the determination of the PI, will not be of childbearing potential.
If the radiology department requires a pregnancy test before administering the 18FDOPA injection, they may perform one per their standard of care

Trial Details

Trial ID:

This trial id was obtained from, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 2
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Mayo Clinic
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Sujay Vora
Principal Investigator Affiliation Mayo Clinic
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Glioblastoma, Malignant Glioma
Additional Details


  • I. Compare overall survival at 12 months for grade IV glioma patients after radiation therapy targeting volumes designed with both 18F-DOPA-PET and conventional magnetic resonance (MR) image (or PET/computed tomography [CT]) information with historical controls.
  • I. Compare progression free survival at 12 months after radiation therapy targeting volumes designed with both 18F-DOPA-PET and conventional MR image information with historical controls.
  • II. Determine acute and late effect toxicity after hypofractionated proton beam radiotherapy treatment including areas of high 18F-DOPA-PET uptake (T/N > 2.0).
  • I. Compare radiotherapy (RT) treatment volumes defined by MR only with RT treatment volumes defined with both PET and MR information for grade IV glioma patients.
  • II. Compare differences in RT volumes identified using biopsy-validated thresholds as highly aggressive disease comparing 18F-DOPA uptake and relative cerebral blood volume (relCBV) from perfusion MRI (pMRI) as well as differences in RT volumes identified using biopsy-validated thresholds as tumor extent comparing 18F-DOPA uptake and diffusion maps from diffusion tensor imaging (DTI) will be evaluated.
  • III. Evaluate quality of life after radiotherapy using European Organization for Research and Treatment of Cancer (EORTC) questionnaires compared with historical controls from Keim-Guibert et al.
  • IV. Compare differences in proton radiation planning utilizing radiobiologic modeling/evaluation techniques performed at Mayo Clinic Rochester to linear energy transfer distribution evaluation at Mayo Clinic Arizona.
OUTLINE: Patients receive 18F-DOPA intravenously (IV) and undergo PET/MRI or PET/CT imaging scan. Patients then receive proton beam radiotherapy over 5 or 10 consecutive days excluding weekend and standard of care temozolomide on days 1-7 or 1-14. Beginning course 2, patients receive standard of care temozolomide on days 1-5. Courses with temozolomide repeat every 28 days for up to 7 courses in the in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 2 months for 1 year, and then periodically for up to 5 years.

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Mayo Clinic, Rochester, Minnesota


Not yet recruiting


Mayo Clinic

Rochester, Minnesota, 55905

Site Contact

Clinical Trials N. Referral Office


Mayo Clinic in Arizona, Scottsdale, Arizona




Mayo Clinic in Arizona

Scottsdale, Arizona, 85259

Site Contact

Clinical Trials Referral Office