NCT03633955 · University of Oklahoma
Pilot Imaging Study of Leukemia
(REALIZE)
What this study is about
This is a forward-looking pilot study, the primary aim of which is to determine whether the presence of 18F FLT imaging signal uptake abnormalities correlate with clinically validated evidence of hematopoietic malignant disease (e.g. MRD, molecular, flow or histology) after immunotherapy and other treatments.
View original scientific description
This is a prospective pilot study, the primary aim of which is to determine whether the presence of 18F FLT imaging signal uptake abnormalities correlate with clinically validated evidence of hematopoietic malignant disease (e.g. MRD, molecular, flow or histology) after immunotherapy and other treatments.
Interventions
DRUG
FLT
F18 labeled thymidine PET/CT scans will be performed before and after patient receives therapies.
Primary outcome measures
Proportion of 18F FLT signal uptake abnormalities with clinical pathology reports for determining the evidence of hematopoietic disease.
Time frame: day -7 to 10 days pre-treatment and +28 (+/- 3 days) post-treatment
A proportion of patients will undergo 18F FLT imaging before and after immunotherapy or standard therapy for hematopoietic malignant disease. To detect changes in the progression of hematopoietic disease 18F FLT image scans collected pre-treatment (baseline) and post-treatment (follow-up) of patient visit at OUHSC will be compared with clinically validated evidence of hematopoietic malignant disease collected using MRD, molecular, flow and histology techniques.
A proportion of 18F FLT uptake in a standard region of interest in marrow to objectively identify disease status in patient with hematopoietic cancers.
Time frame: day -7 to 10 days pre-treatment and +28 (+/- 3 days) post-treatment
For proportion of patient the analyses will be compared between two Arms of disease cohort. Arm A to include patients who received immunotherapy (immunotherapy protocol co-enrollment or other immunotherapy), and Arm B: those who received other non-immune therapies to treat their cancers (excludes HSCT). For marrow disease, the intra-medullary pattern and standard unit of uptake (SUV) will be compared pre- and post-treatment between patients in remission clinically versus those with greater disease burden, to determine if 18F FLT uptake correlates with identified clinical relapse.
Mean differences of 18F FLT uptake to determine extramedullary disease.
Time frame: day -7 to 10 days pre-treatment and +28 (+/- 3 days) post-treatment
For proportion of patient undergoing 18F FLT scan, the extramedullary disease will be identified by comparing the SUV and size of lesions pre- and post-treatment. The comparisons will be done in two arms of disease cohort Arm A, i.e., to include patients who received immunotherapy (immunotherapy protocol co-enrollment or other immunotherapy), and Arm B: those who received other non-immune therapies to treat their cancers (excludes HSCT).
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Aged 4 to 80 years
- Evidence of high-risk hematopoietic malignancy with relapsed/refractory disease: acute lymphocytic leukemia, Acute myeloid leukemia, Ambiguous lineage leukemia, myeloma
- Karnofsky/Lansky score of ≥ 50
- Agree to use contraceptive measures during study protocol participation (when age appropriate)
- Patient or parent/guardian capable of providing informed consent.
- Ability to undergo 18F FLT imaging without sedation
- Bilirubin \< 2.5 mg/dL, AST/ALT \<5x upper limit of normal, Serum creatinine \< 1.0 or 2x the upper limit of normal (whichever is higher)
- Pulse oximetry of \> 90% on room air
- Ability to undergo 18F FLT imaging without sedation
- Anticipated immunotherapy (Arm A to include patients who received immune therapy with co-enrollment on a separate protocol or other immunotherapy) and Arm B, those who received other non-immune therapies to treat their cancers (excludes HSCT but includes chemotherapy or non-HSCT radiotherapy).
Exclusion criteria
- Patients with uncontrolled infections
- Pregnancy or lactating
- History of prior fluorothymidine allergy or intolerance.
Where
- Washington D.C., District of Columbia
- Atlanta, Georgia
- Oklahoma City, Oklahoma
Collaborators
Emory University
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Apr 23, 2026 · Source of record for eligibility and locations