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18F-DOPA-PET in Finding Tumors in Patients With Newly Diagnosed Gliomas Undergoing Radiation Therapy

Evaluating the Impact of 18F-DOPA-PET on Radiotherapy Planning for Newly Diagnosed Gliomas

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01991977
Enrollment
91
Registered
2013-11-25
Start date
2013-12-31
Completion date
2024-07-15
Last updated
2025-10-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Malignant Glioma

Brief summary

This phase II trial studies how well fluorine F 18 fluorodopa (18F-DOPA)-positron emission tomography (PET) works in finding tumors in patients with newly diagnosed gliomas undergoing radiation therapy. Comparing results of diagnostic procedures done before and during radiation therapy may help doctors predict a patient's response to treatment and help plan the best treatment.

Detailed description

PRIMARY OBJECTIVES: I. Compare confirmed-progression free survival at 6 months for grade IV MGMT unmethylated glioma patients after radiation therapy targeting volumes designed with both 18F-DOPA PET and conventional magnetic resonance (MR) image information with historical controls from Mayo Clinic Rochester patients, including those treated on North Central Cancer Treatment Group (NCCTG) clinical trials. SECONDARY OBJECTIVES: I. Compare progression free survival at 12 months for grade III patients after radiation therapy targeting volumes designed with both 18F-DOPA PET and conventional MR image information with historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. II. Compare patient overall survival after radiation therapy targeting volumes designed with both 18F-DOPA PET and conventional MR image information with historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. III. Evaluate quality of life after radiotherapy treatment targeting dose escalated volumes defined to include high 18F-DOPA PET uptake. IV. Determine acute and late effect toxicity after radiotherapy treatment targeting dose escalated volumes defined to include high 18F-DOPA PET uptake. V. Compare confirmed-progression free survival at 12 months for grade IV MGMT methylated patients after radiation therapy targeting volumes designed with both 18F-DOPA PET and conventional MR image information with historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. VI. Compare confirmed-progression free survival in grade IV MGMT un-methylated patients with similar historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. VII. Compare confirmed-progression free survival in grade IV MGMT methylated patients with similar historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. TERTIARY OBJECTIVES: I. Compare radiation therapy (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 timing of accurate identification of progression defined by 18F-DOPA PET, perfusion magnetic resonance imaging (pMRI) and conventional MRI for grade IV glioma patients. III. Compare patterns of failure after radiation therapy targeting volumes defined with target volumes designed to with both 18F-DOPA PET and conventional MR image information with patterns of failure for historical controls from Mayo Clinic Rochester patients, including those on NCCTG clinical trials. IV. Compare RT treatment volumes defined by MR only with RT treatment volumes defined with both PET and MR information for grade III glioma patients. V. Evaluate intra- and inter-observer variability with vs. without the addition of 18F-DOPA PET uptake for radiotherapy target volume delineation. VI. Compare timing of accurate identification of progression defined by 18F-DOPA PET, pMRI and conventional MRI for grade III glioma patients. VII. Compare predictive capabilities of 18F-DOPA PET, pMRI and diffusion tensor imaging (DTI) for localization of recurrences for patients treated with 18F-DOPA PET-guided RT dose escalation. OUTLINE: Patients undergo 18F DOPA-PET, pMRI, and DTI within 14 days before radiation therapy, 3-6 weeks after radiation therapy, and during follow-up. Patients also undergo intensity-modulated radiation therapy (IMRT) over 30 fractions and receive temozolomide. After completion of study treatment, patients are followed up periodically for up to 5 years.

Interventions

DRUGTemozolomide

Receive temozolomide

PROCEDUREPositron Emission Tomography

Undergo 18F-DOPA-PET

OTHERQuality-of-Life Assessment

Ancillary studies

Undergo DTI

Undergo 18F-DOPA-PET

RADIATIONIntensity-Modulated Radiation Therapy

Undergo IMRT

Sponsors

Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically confirmed newly diagnosed grade IV malignant glioma; Note: grade III patients are no longer being enrolled * Computed tomography (CT) simulation, immobilization, MRI and PET imaging, treatment planning, and all follow-up MRI and PET scans to be performed at Mayo Clinic Rochester; Note: the actual radiation therapy treatments and follow-up other than imaging can be performed at Mayo Clinic Rochester, Northfield, LaCrosse, Mankato, Eau Claire, or Albert Lea * Provide written informed consent * Ability to complete questionnaire(s) by themselves or with assistance

Exclusion criteria

* Patients diagnosed with anaplastic oligodendroglioma * 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 anti-dopaminergic, or dopamine agonist medication or less than 6 half-lives from discontinuance of dopamine agonists); NOTE: other potentially interfering drugs consist of: amoxapine, amphetamine, benztropine, bupropion, 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 * Any of the following: * Pregnant women * Nursing women * Men or women of childbearing potential who are unwilling to employ adequate contraception

Design outcomes

Primary

MeasureTime frameDescription
Proportion of Grade IV MGMT Un-methylated Patients That Experience Confirmed-progression-free Survival at 6 Months (CPFS6)Time from registration to the confirmed disease progression, assessed at 6 monthsThe proportion of Grade IV MGMT un-methylated patients that experience confirmed-progression-free survival at 6 months (CPFS6). Progression is defined by any of the following: * ≥25% increase in the sum of products of perpendicular diameters of enhancing lesions compared to the smallest tumor measurement obtained either at baseline or best response, on stable or increasing doses of corticosteroids * Significant increase in T2/FLAIR non-enhancing lesion on stable or increasing doses of corticosteroids compared to baseline scan or best response following initiation of therapy, not due to co-morbid events * Any new lesion * Clear clinical deterioration not attributable to other causes apart from the tumor or changes in corticosteroid dose. * Failure to return for evaluation due to death or deteriorating condition * Clear progression of non-measurable disease

Secondary

MeasureTime frameDescription
Overall SurvivalUp to 5 yearsThe median survival time and 95%CI will be estimated using the method of Kaplan-Meier.
Progression Free SurvivalUp to 5 yearsThe median progression-free survival time and 95%CI will be estimated using the method of Kaplan-Meier.
Quality of Life Evaluated With the M. D. Anderson Symptom Inventory - Brain Tumor (MDASI-BT) QuestionnaireUp to 5 yearsThe MDASI-BT consists of 28 questions. Twenty-two questions are related to severity of symptoms over the last 24 hours and are answered on a scale of 0-10 where 0=not present and10=as bad as you can imagine. The remaining 6 questions are related to how symptoms have interfered with daily life over the past 24 hours and are answered on a scale of 0-10 where 0=did not interfere and 10=interfered completely. Higher scores indicate greater severity of symptoms and greater interference with daily life. Analysis will include median change percent from baseline.
Number of Patients Experiencing Grade 3+ Treatment-related ToxicitiesUp to 5 yearsAdverse events graded using Common Terminology Criteria for Adverse Events version 4.0
Number of Patients Experiencing Grade 4+ Late Treatment-related ToxicitiesUp to 5 yearsLate treatment-related toxicities will be assessed using the Radiation Therapy Oncology Group (RTOG) European Organization for Research and the Treatment of Cancer (EORTC) toxicity criteria.

Other

MeasureTime frameDescription
Radiation Therapy Treatment Volumes Defined by Magnetic Resonance Imaging Only or Defined With Both Positron Emission Tomography and Magnetic Resonance Imaging Information for Grade IV Glioma PatientsUp to 5 yearsPaired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information. The analysis of volumes from 72 grade IV patients will have 90% power to detect differences in volumes with an effect size of 0.39 using a paired t-test with a 0.05 two-sided significance level. Alternate metrics for comparison will also be assessed, including spatial overlap, distan
Inter-observer Variability With or Without the Addition of 18F-DOPA Positron Emission Tomography Uptake for Radiotherapy Target Volume DelineationUp to 5 yearsThe concordance correlation coefficient will be used to measure agreement between volumes generated with each method, as well as to evaluate inter-observer variability, where variability associated with magnetic resonance imaging will serve as the standard for comparison.
Timing of Accurate Identification of Progression Defined by 18F- DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging and Conventional Magnetic Resonance Imaging for Grade III Glioma PatientsUp to 5 yearsProgression identification timing will be compared using Kaplan-Meier methods and paired t-tests to determine if differences exist between the modalities. An exploratory analysis of diffusion tensor imaging for detecting invasive non-enhancing tumor recurrence will also be performed.
Timing of Accurate Identification of Progression Defined by 18F- DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging and Conventional Magnetic Resonance Imaging for Grade IV Glioma PatientsUp to 5 yearsThe progression identification timing will be compared by calculating the percentage of time each modality was earlier than conventional magnetic resonance imaging. With a sample size of 72, if the observed percentage earlier than conventional magnetic resonance imaging is 30% for either modality, a two-sided 95% confidence interval for a single proportion using the large sample normal approximation will be +/- 10.6%. Progression identification timing will also be compared using Kaplan-Meier methods and paired t-tests to determine if differences exist between the modalities.
Intra-observer Variability With or Without the Addition of 18F-DOPA Positron Emission Tomography Uptake for Radiotherapy Target Volume DelineationUp to 5 yearsThe concordance correlation coefficient will be used to measure agreement between volumes generated with each method, as well as to evaluate inter-observer variability, where variability associated with magnetic resonance imaging will serve as the standard for comparison.
Magnetic Resonance Imaging-only Defined Volumes and the Volumes Defined With the Combination of Magnetic Resonance and Positron Emission Tomography PlanningUp to 5 yearsPaired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information. The analysis of volumes from 72 grade IV patients will have 90% power to detect differences in volumes with an effect size of 0.39 using a paired t-test with a 0.05 two-sided significance level. Alternate metrics for comparison will also be assessed, including spatial overlap, distanc
Patterns of Failure After Radiation Therapy Targeting Volumes by 18F-DOPA Positron Emission Tomography and Conventional Magnetic Resonance ImagingUp to 5 yearsChi-square tests of proportions will be used to test for differences in the proportions of patients with central, in-field, marginal, or distant failures between the patients on this study and historical controls.
Predictive Capabilities of 18F-DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging, and Diffusion Tensor Imaging for Localization of RecurrencesUp to 5 yearsCompared by identifying the recurrence volume with each modality and correlating with identification of aggressive disease in the pre-radiation therapy planning images.
Radiation Therapy Treatment Volumes Defined by Magnetic Resonance Imaging Only and Defined With Both Positron Emission Tomography and Magnetic Resonance Imaging Information for Grade III Glioma PatientsUp to 5 yearsPaired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information.

Countries

United States

Participant flow

Participants by arm

ArmCount
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)
Patients undergo 18F DOPA-PET, pMRI and DTI within 14 days before radiation therapy, 3-6 weeks after radiation therapy, and during follow-up. Patients also undergo IMRT over 30 fractions and receive temozolomide.
79
Total79

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyWithdrew after start of treatment5
Overall StudyWithdrew prior to receiving treatment7

Baseline characteristics

CharacteristicDiagnostic (PET, pMRI, DTI, IMRT, Temozolomide)
Age, Continuous54.9 years
STANDARD_DEVIATION 11.3
Histologic grade of primary tumor
Grade 3
4 Participants
Histologic grade of primary tumor
Grade 4
75 Participants
MGMT
Methylated
25 Participants
MGMT
NA
15 Participants
MGMT
Un-Methylated
39 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
79 Participants
Sex: Female, Male
Female
33 Participants
Sex: Female, Male
Male
46 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
56 / 84
other
Total, other adverse events
82 / 84
serious
Total, serious adverse events
3 / 84

Outcome results

Primary

Proportion of Grade IV MGMT Un-methylated Patients That Experience Confirmed-progression-free Survival at 6 Months (CPFS6)

The proportion of Grade IV MGMT un-methylated patients that experience confirmed-progression-free survival at 6 months (CPFS6). Progression is defined by any of the following: * ≥25% increase in the sum of products of perpendicular diameters of enhancing lesions compared to the smallest tumor measurement obtained either at baseline or best response, on stable or increasing doses of corticosteroids * Significant increase in T2/FLAIR non-enhancing lesion on stable or increasing doses of corticosteroids compared to baseline scan or best response following initiation of therapy, not due to co-morbid events * Any new lesion * Clear clinical deterioration not attributable to other causes apart from the tumor or changes in corticosteroid dose. * Failure to return for evaluation due to death or deteriorating condition * Clear progression of non-measurable disease

Time frame: Time from registration to the confirmed disease progression, assessed at 6 months

Population: All Grade IV MGMT un-methylated patients meeting eligibility criteria who have signed a consent form and who have begun treatment with 18F-DOPA PET image-guided dose escalation RT will be evaluable for the endpoint.

ArmMeasureValue (NUMBER)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Proportion of Grade IV MGMT Un-methylated Patients That Experience Confirmed-progression-free Survival at 6 Months (CPFS6)0.795 proportion of participants
Secondary

Number of Patients Experiencing Grade 3+ Treatment-related Toxicities

Adverse events graded using Common Terminology Criteria for Adverse Events version 4.0

Time frame: Up to 5 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Number of Patients Experiencing Grade 3+ Treatment-related Toxicities17 Participants
Secondary

Number of Patients Experiencing Grade 4+ Late Treatment-related Toxicities

Late treatment-related toxicities will be assessed using the Radiation Therapy Oncology Group (RTOG) European Organization for Research and the Treatment of Cancer (EORTC) toxicity criteria.

Time frame: Up to 5 years

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Number of Patients Experiencing Grade 4+ Late Treatment-related Toxicities0 Participants
Secondary

Overall Survival

The median survival time and 95%CI will be estimated using the method of Kaplan-Meier.

Time frame: Up to 5 years

Population: All eligible patients were included in analysis.

ArmMeasureGroupValue (MEDIAN)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Overall SurvivalUnmethylated patients16.0 months
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Overall SurvivalMethylated patients35.5 months
Secondary

Progression Free Survival

The median progression-free survival time and 95%CI will be estimated using the method of Kaplan-Meier.

Time frame: Up to 5 years

Population: All patients eligible for analysis were included

ArmMeasureGroupValue (MEDIAN)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Progression Free SurvivalUnmethylated patients8.7 months
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Progression Free SurvivalMethylated patients10.7 months
Secondary

Quality of Life Evaluated With the M. D. Anderson Symptom Inventory - Brain Tumor (MDASI-BT) Questionnaire

The MDASI-BT consists of 28 questions. Twenty-two questions are related to severity of symptoms over the last 24 hours and are answered on a scale of 0-10 where 0=not present and10=as bad as you can imagine. The remaining 6 questions are related to how symptoms have interfered with daily life over the past 24 hours and are answered on a scale of 0-10 where 0=did not interfere and 10=interfered completely. Higher scores indicate greater severity of symptoms and greater interference with daily life. Analysis will include median change percent from baseline.

Time frame: Up to 5 years

Population: Patients that completed an assessment at baseline and at the first MRI assessment were included in analysis

ArmMeasureValue (MEDIAN)
Diagnostic (PET, pMRI, DTI, IMRT, Temozolomide)Quality of Life Evaluated With the M. D. Anderson Symptom Inventory - Brain Tumor (MDASI-BT) Questionnaire-0.167 percent change
Other Pre-specified

Inter-observer Variability With or Without the Addition of 18F-DOPA Positron Emission Tomography Uptake for Radiotherapy Target Volume Delineation

The concordance correlation coefficient will be used to measure agreement between volumes generated with each method, as well as to evaluate inter-observer variability, where variability associated with magnetic resonance imaging will serve as the standard for comparison.

Time frame: Up to 5 years

Other Pre-specified

Intra-observer Variability With or Without the Addition of 18F-DOPA Positron Emission Tomography Uptake for Radiotherapy Target Volume Delineation

The concordance correlation coefficient will be used to measure agreement between volumes generated with each method, as well as to evaluate inter-observer variability, where variability associated with magnetic resonance imaging will serve as the standard for comparison.

Time frame: Up to 5 years

Other Pre-specified

Magnetic Resonance Imaging-only Defined Volumes and the Volumes Defined With the Combination of Magnetic Resonance and Positron Emission Tomography Planning

Paired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information. The analysis of volumes from 72 grade IV patients will have 90% power to detect differences in volumes with an effect size of 0.39 using a paired t-test with a 0.05 two-sided significance level. Alternate metrics for comparison will also be assessed, including spatial overlap, distanc

Time frame: Up to 5 years

Other Pre-specified

Patterns of Failure After Radiation Therapy Targeting Volumes by 18F-DOPA Positron Emission Tomography and Conventional Magnetic Resonance Imaging

Chi-square tests of proportions will be used to test for differences in the proportions of patients with central, in-field, marginal, or distant failures between the patients on this study and historical controls.

Time frame: Up to 5 years

Other Pre-specified

Predictive Capabilities of 18F-DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging, and Diffusion Tensor Imaging for Localization of Recurrences

Compared by identifying the recurrence volume with each modality and correlating with identification of aggressive disease in the pre-radiation therapy planning images.

Time frame: Up to 5 years

Other Pre-specified

Radiation Therapy Treatment Volumes Defined by Magnetic Resonance Imaging Only and Defined With Both Positron Emission Tomography and Magnetic Resonance Imaging Information for Grade III Glioma Patients

Paired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information.

Time frame: Up to 5 years

Other Pre-specified

Radiation Therapy Treatment Volumes Defined by Magnetic Resonance Imaging Only or Defined With Both Positron Emission Tomography and Magnetic Resonance Imaging Information for Grade IV Glioma Patients

Paired t-test statistical analysis will be performed to determine if any differences exist and the level of statistical significance between treatment volumes defined by magnetic resonance imaging only and treatment volumes defined with both positron emission tomography and magnetic resonance imaging information. The analysis of volumes from 72 grade IV patients will have 90% power to detect differences in volumes with an effect size of 0.39 using a paired t-test with a 0.05 two-sided significance level. Alternate metrics for comparison will also be assessed, including spatial overlap, distan

Time frame: Up to 5 years

Other Pre-specified

Timing of Accurate Identification of Progression Defined by 18F- DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging and Conventional Magnetic Resonance Imaging for Grade III Glioma Patients

Progression identification timing will be compared using Kaplan-Meier methods and paired t-tests to determine if differences exist between the modalities. An exploratory analysis of diffusion tensor imaging for detecting invasive non-enhancing tumor recurrence will also be performed.

Time frame: Up to 5 years

Other Pre-specified

Timing of Accurate Identification of Progression Defined by 18F- DOPA Positron Emission Tomography, Perfusion Magnetic Resonance Imaging and Conventional Magnetic Resonance Imaging for Grade IV Glioma Patients

The progression identification timing will be compared by calculating the percentage of time each modality was earlier than conventional magnetic resonance imaging. With a sample size of 72, if the observed percentage earlier than conventional magnetic resonance imaging is 30% for either modality, a two-sided 95% confidence interval for a single proportion using the large sample normal approximation will be +/- 10.6%. Progression identification timing will also be compared using Kaplan-Meier methods and paired t-tests to determine if differences exist between the modalities.

Time frame: Up to 5 years

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026