Abstract
Purpose
The aim of this study is to examine the reproducibility of anti-1-amino-3-[18F]fluorocyclobutane-1-carboxylic acid (anti-3-[18F]FACBC) quantitative measurements in key background structures and untreated malignant lesions.
Procedures
Retrospective review of 14 patients who underwent follow-up anti-3-[18F]FACBC positron emission tomography-X-ray computed tomography (PET-CT) for prostate carcinoma recurrence. Standard uptake values (SUV) were measured in both original and follow-up scans in key background structures and untreated malignant lesions. Absolute and percent mean difference in SUV between scans and interclass correlation coefficients (ICC) were also computed.
Results
Mean (±SD, range) scan interval was 17.4 months (±7.1, 4–29). %Mean difference in SUVmean was <20 % in background structures with low absolute differences. ICCs were >0.6 except for early-phase blood pool (ICC = 0.4). SUVmax in malignant lesions without interim therapy increased or remained stable over time.
Conclusions
Despite variable time interval between scans, FACBC PET-CT demonstrates acceptable reproducibility in key background structures. Untreated malignant lesions showed stable or increased uptake over time. A formal test-retest study is planned.
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Acknowledgments
We would like to acknowledge Eric Jablonowski for his help with the figures included in the manuscript. This study was funded by the National Institutes of Health (5R01CA129356) and (P50 CA 128301), and Georgia Cancer Coalition.
Conflict of Interest
Emory University and Dr. Mark Goodman are eligible to receive royalties from anti-3-[18F]FACBC.
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Odewole, O.A., Oyenuga, O.A., Tade, F. et al. Reproducibility and Reliability of Anti-3-[18F]FACBC Uptake Measurements in Background Structures and Malignant Lesions on Follow-Up PET-CT in Prostate Carcinoma: an Exploratory Analysis. Mol Imaging Biol 17, 277–283 (2015). https://doi.org/10.1007/s11307-014-0797-1
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DOI: https://doi.org/10.1007/s11307-014-0797-1