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Positron Emission Tomography (PET) with 1-Aminocyclobutane-1-[(11)C]carboxylic Acid (1-[(11)C]-ACBC) for Detecting Recurrent Brain Tumors. 1998

K F. Hübner, and J A. Thie, and G T. Smith, and G W. Kabalka, and I B. Keller, and A B. Kliefoth, and S K. Campbell, and E Buonocore
Biomedical Imaging Center, Department of Radiology, The University of Tennessee Medical Center at Knoxville (UTMCK), Knoxville, TN, USA

This study was done to determine whether 1-[(11)C]ACBC PET has any advantages over 2-[(18)F]FDG PET, CT, or MRI in detecting recurrent brain tumors, and whether quantitative 1-[(11)C]ACBC PET information improves the accuracy of "visual" image interpretation.Twenty patients with recurrent brain tumor underwent dynamic PET. Images were analyzed by visual interpretation; in addition, standardized uptake values (SUVs) and Patlak values (k(1)*k(3)/k) were evaluated.1-[(11)C]ACBC identified 19/20 recurrent brain tumors, [18F]FDG 13/19, MRI 13/19, and CT 8/16. Based on SUVs, the average tumor-to-contralateral gray matter ratio of 1-[(11)C]ACBC was 5.0 and 0.5 for 2-[(18)F]FDG. Mean Patlak values of 1-[(11)C]ACBC were 0.044 +/- 0.047 for high and 0.034 +/- 0.026 for low grade tumors. However, visual interpretation was effective without quantitative PET data.1-[(11)C]ACBC, accurately detects recurrent tumors for selecting biopsy sites and treatment planning.

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