Fig. 2From: In vivo quantitative imaging of photoassimilate transport dynamics and allocation in large plants using a commercial positron emission tomography (PET) scannerOptimization of PET parameters using 18F plant phantoms. a Effect of scatter on the accuracy of stem and root phantom radioactivity measurements. Bars show percent reduction in the error of phantom measurement after scatter correction under 3-D mode. b Effect of attenuation on the accuracy of stem and root phantom radioactivity measurements. Bars show percent reduction in the error of phantom measurement after attenuation correction under either 2-D (white) or 3-D (Grey) mode. c & d Error in the stem c and root d phantom radioactivity measurements based on the emission scans under 2-D and 3-D mode with different transmission scan times (10Â s, 2Â min, 4Â min, and 20Â min). For (C) and (D), bars show the average error of PET measurements of 18F phantom radioactivity, after attenuation correction and scatter correction, as a percent of the radioactivity of the phantoms measured using a calibrated scintillation counter. For all graphs error bars represent standard errorBack to article page