Comparison of F-18-Choline PET/CT and MRI functional parameters in prostate cancer

Abstract : Aim - Array Materials and methods - Fourteen patients with proven prostate cancer who underwent FCH PET/CT and multiparametric MRI were enrolled. FCH PET/CT consisted in a dual phase: early pelvic list-mode acquisition and late whole-body acquisition. FCH PET/CT and multiparametric MRI examinations were registered and tumoral volume-of-interest were drawn on the largest lesion visualized on the apparent diffusion coefficient (ADC) map and projected onto the different multiparametric MR images and FCH PET/CT images. Concerning the FCH uptake, kinetic parameters were extracted with the best model selected using the Akaike information criterion between the one- and two-tissue compartment models with an imaging-derived plasma input function. Other FCH uptake parameters (early SUVmean and late SUVmean) were extracted. Concerning functional parameters derived by MRI scan, cell density (ADC from diffusion weighting imaging) and vessel permeability (K and V using the Tofts pharmakinetic model from dynamic contrast-enhanced imaging) parameters were extracted. Spearman's correlation coefficients were calculated to compare parameters. Results - The one-tissue compartment model for kinetic analysis of PET images was selected. Concerning correlation analysis between PET parameters, K was highly correlated with early SUVmean (r = 0.83, p < 0.001) and moderately correlated with late SUVmean (r = 0.66, p = 0.010) and early SUVmean was highly correlated with late SUVmean (r = 0.90, p < 0.001). No significant correlation was found between functional MRI parameters. Concerning correlation analysis between PET and functional MRI parameters, K (from FCH PET/CT imaging) was moderately correlated with K (from perfusion MR imaging) (r = 0.55, p = 0.041). Conclusions - No significant correlation was found between FCH PET/CT and multiparametric MRI metrics except FCH influx which is moderately linked to the vessel permeability in prostate cancer.
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Submitted on : Friday, January 25, 2019 - 2:12:36 PM
Last modification on : Friday, September 6, 2019 - 10:18:02 AM

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Xavier Palard-Novello, Luc Beuzit, Giulio Gambarota, Florence Le Jeune, Etienne Garin, et al.. Comparison of F-18-Choline PET/CT and MRI functional parameters in prostate cancer. Annals of Nuclear Medicine, Springer Verlag, 2019, 33 (1), pp.47-54. ⟨10.1007/s12149-018-1302-8⟩. ⟨hal-01994392⟩

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