This clinical trial studies multi-tracer positron emission tomography in patients with solid tumors. Diagnostic procedures, such as multi-tracer positron emission tomography, may help measure a patient's response to treatment.
PRIMARY OBJECTIVES: I. Provide a reliable and validated cadre of positron emission tomography (PET) imaging derived biomarkers that yield a better understanding of: 1) early clinical benefit from various therapeutic agents in investigational and recently approved therapies; 2) efficacy during novel therapeutics in investigational therapeutics and recently approved therapeutics at Huntsman Cancer Institute (HCI); and 3) possible predict prognosis or other long-term outcomes. II. Reveal a more detailed understanding of: (1) the in vivo biologic mechanisms of various therapeutic drugs in investigational therapies and recently approved therapies at HCI (2) information on why particular functional imaging profiles are seen in treated patients. III. Reveal a more detailed understanding of how the combination of molecular imaging derived biomarkers will be potentially useful to physicians for decision making and for explanation of efficacy or outcomes for patients with cancer. IV. Implement and evaluate a new imaging technology for multi-tracer PET imaging of these tracers. OUTLINE: Patients undergo PET scans with fludeoxyglucose (FDG) F 18 (18FDG), fluorine F 18 fluorothymidine (FLT), and water (H2O) O-15 (15O) tracers at baseline and within 7 days of completion of 1 or 2 (if the course is less than 3 weeks) therapeutic agent courses.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
26
Undergo PET scans with \[F-18\]fluorodeoxyglucose
Undergo PET scans with fluorine \[F-18\]fluorothymidine
Undergo PET scans with 3 radiotracers (fludeoxyglucose F 18, fluorine F 18 fluorothymidine, and water O-15)
Huntsman Cancer Institute/University of Utah
Salt Lake City, Utah, United States
FDG Therapeutic Response
The patients underwent baseline and repeat PET/CT imaging (after one to two cycles of treatment) with \[F-18\]fluorodeoxyglucose (FDG) and \[F-18\]fluorothymidine (FLT). The percent change in the SUVmax for FDG was calculated and used to determine the response. Partial response (PR) was defined as 35% or greater reduction in SUVmax, Progressive Disease (PD) was defined as 35% or greater increase in SUVmax, and Stable Disease (SD) was defined as all other changes in SUVmax.
Time frame: 1-2 cycles of treatment - approximately one month
FLT Therapeutic Response
The patients underwent baseline and repeat PET/CT imaging (after one to two cycles of treatment) with \[F-18\]fluorodeoxyglucose (FDG) and \[F-18\]fluorothymidine (FLT). The percent change in the SUVmax for FLT was calculated and used to determine the response. Partial response (PR) was defined as 35% or greater reduction in SUVmax, Progressive Disease (PD) was defined as 35% or greater increase in SUVmax, and Stable Disease (SD) was defined as all other changes in SUVmax.
Time frame: 1-2 cycles of treatment - approximately one month
Standard Therapeutic Response
The patients underwent baseline and repeat PET/CT imaging (after one to two cycles of treatment) with \[F-18\]fluorodeoxyglucose (FDG) and \[F-18\]fluorothymidine (FLT). Percent change in lesion measurements according to standard response criteria for the patient's tumor type were obtained. For brain tumors, Response Assessment in Neuro-Oncology (RANO) criteria were used. Partial Response (PR) was defined as 50% or greater reduction in lesion measurements, Progressive Disease (PD) was 25% or greater increase in measurements, and Stable Disease (SD) was neither PD or PR. Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria were used for solid tumors, with PR defined as 30% or greater reduction in measurements, PD was 20% or greater increase in measurements, and SD was all other changes.
Time frame: 1-2 cycles of treatment - approximately one month
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Undergo PET scans with water O-15 tracers