SPECT Imaging for Pharmacokinetics and dosimEtry Towards TREATment Optimization
Single-Photon Emission Computed Tomography (SPECT) Imaging for Pharmacokinetics and dosimEtry Towards TREATment Optimization (SEEtoTREAT)
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
80 participants
Feb 3, 2025
OBSERVATIONAL
Conditions
Summary
The investigators will study SPECT imaging of radiopharmaceutical therapies given as standard of care or as part of other compatible research protocols. The goal is to validate the quantitative SPECT image reconstruction methods developed in this proposal, and to investigate the relation between dosimetry calculated from SPECT images and the outcomes. Patients will be recruited for SPECT/CT imaging during treatment. This is an observational study no additional new drugs or activities will be administrated. The investigators will perform SPECT imaging on a total of 80 patients (\~20 each from year 2 to year 5). Each participant will be imaged 3 times after the first and last cycles of planned radiopharmaceutical therapy.
Eligibility
Inclusion Criteria6
- Cohort A: Patients with advanced prostate cancer planning to undergo treatment with Radium-223
- Cohort B: Patients with advanced cancer undergoing treatment with 177Lu-DOTATATE or 177Lu-PSMA-617
- \*\*Eligible patients may be planning to undergo these treatments as part of standard of care or as part of another research protocol
- Age \> 18 years
- Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2
- Histologic confirmation of malignancy
Exclusion Criteria2
- Patient is participating in another research protocol that does not allow participation in this imaging protocol or that has schedule of procedures that would not be compatible with this protocol.
- Patient unable to tolerate SPECT scan time, scan frequency, or position.
Interventions
Radium-223 will be given as per standard of care or other clinical trial. It is typically administered intravenously via slow injection once every 4 weeks with a dosage of 55 kBq/kg per cycle. Patients typically receive up to six cycles unless unacceptable toxic effects occurred, disease progression is apparent, or the patient is unable or unwilling to adhere to treatment. Three SPECT/CT studies will be performed for research purposes after 2 cycles in patients who consent to participate in this imaging and dosimetry study. These will be performed at 2-4 hr, 24 hr, and 48 hr after any cycle of Radium-223. Protocol preference is for imaging with 2 cycles, ideally cycle 1 and cycle 6, but imaging with any one or two cycle(s) is acceptable. The imaging time at each time point is approximately 30 minutes per field of view with two fields of view (1 hr total) typically collected sequentially (i.e., without repositioning the patient on the imaging table).
177Lu-DOTATATE to be given as Standard of Care (SOC) or other clinical trial. It is typically infused intravenously over a period of 20-60 minutes with peptide co-infusion prior and during the infusion. Patients will receive 4 cycles of 177Lu-DOTATATE administered approximately every 8 weeks. Treatment cycle is defined as 8 consecutive weeks (D1-D56) following a dose of 177Lu-DOTATATE. Patients receive up to four infusions of 7.4 GBq (200 mCi) every 8 weeks unless unacceptable toxic effects occurred, disease progression is apparent, or the patient is unable or unwilling to adhere to treatment. Three SPECT/CT studies will be performed for research purposes after 2 cycles in patients who consent to participate in this imaging and dosimetry study. Lu-177 SPECT CT will be performed at 24 (D2), 48 (D3), and 96 (D5) of any cycle of therapy. Imaging time at each time point is \~ 15-22 minutes per field of view with two fields of view (45 min total) typically collected sequentially.
177Lu-PSMA-617 will be given as per SOC or other clinical trial. It is typically infused intravenously over a period of 20-60 minutes. Up to 6 cycles of 177Lu- PSMA-617 will be administered approximately every 6 weeks. Treatment cycle is defined as 6 consecutive weeks (D1-D42) following a dose of 177Lu- PSMA-617. Patients will receive up to six infusions of 7.4 GBq (200 mCi) every 6 weeks unless unacceptable toxic effects occurred, disease progression is apparent, or the patient is unable or unwilling to adhere to treatment. Three SPECT/CT studies will be performed for research purposes after 2 cycles in patients who consent to participate in this imaging and dosimetry study. Lu-177 SPECT CT will be performed at 24 (D2), 48 (D3), and 96 (D5) of any cycle of therapy. Imaging time at each time point is approximately 15-22 minutes per field of view with two fields of view (45 min total) typically collected sequentially.
Locations(1)
View Full Details on ClinicalTrials.gov
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NCT06389097