Pilot Imaging Study of Leukemia

Multi-institutional Prospective Pilot Study of Radiology Evaluation of Acute Leukemia Infiltration analyZed by Experimental Imaging

Pilot Imaging Study of Leukemia (NCT03633955) is a Phase 1 interventional studying Acute Lymphocytic Leukemia and Acute Myeloid Leukemia, sponsored by University of Oklahoma. RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

About This Trial

What Stage of Research Is This?

Phase 1 trials test a new treatment for the first time in humans, focusing on safety, dosing, and how the body processes the drug. For Acute Lymphocytic Leukemia, a Phase 1 study typically enrolls a small number of participants — often healthy volunteers or patients who have exhausted standard treatment options. Phase 1 results determine whether a treatment moves into larger Phase 2 efficacy studies.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

Target enrollment of 60 participants puts this in the typical range for a Phase 2-style efficacy study or a moderate Phase 3 trial in a focused Acute Lymphocytic Leukemia subpopulation. At this scale, the study has enough statistical power to detect a clear treatment effect but is not the largest cohort in the field.

Who May Be Eligible (Plain English)

Who May Qualify: 1. Aged 4 to 80 years 2. Evidence of high-risk hematopoietic malignancy with relapsed/refractory disease: acute lymphocytic leukemia, Acute myeloid leukemia, Ambiguous lineage leukemia, myeloma 3. Karnofsky/Lansky score of ≥ 50 4. Agree to use contraceptive measures during study protocol participation (when age appropriate) 5. Patient or parent/guardian capable of providing willing to sign a consent form. 6. Ability to undergo 18F FLT imaging without sedation 7. 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) 8. Pulse oximetry of \> 90% on room air 9. Ability to undergo 18F FLT imaging without sedation 10. 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). Who Should NOT Join This Trial: 1. Patients with uncontrolled infections 2. Pregnancy or lactating 3. History of prior fluorothymidine allergy or intolerance. Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language

Inclusion Criteria: 1. Aged 4 to 80 years 2. Evidence of high-risk hematopoietic malignancy with relapsed/refractory disease: acute lymphocytic leukemia, Acute myeloid leukemia, Ambiguous lineage leukemia, myeloma 3. Karnofsky/Lansky score of ≥ 50 4. Agree to use contraceptive measures during study protocol participation (when age appropriate) 5. Patient or parent/guardian capable of providing informed consent. 6. Ability to undergo 18F FLT imaging without sedation 7. 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) 8. Pulse oximetry of \> 90% on room air 9. Ability to undergo 18F FLT imaging without sedation 10. 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: 1. Patients with uncontrolled infections 2. Pregnancy or lactating 3. History of prior fluorothymidine allergy or intolerance.

Treatments Being Tested

DRUG

FLT

F18 labeled thymidine PET/CT scans will be performed before and after patient receives therapies.

Locations (3)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

Children's National Health System

Washington D.C., District of Columbia, United States

Emory University

Atlanta, Georgia, United States

University of Oklahoma Health Sciences Center

Oklahoma City, Oklahoma, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT03633955), the sponsor (University of Oklahoma), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT03633955 clinical trial studying?

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. The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT03633955?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT03633955?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT03633955. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT03633955. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.