Quantitative imaging of yttrium-86 PET with the ECAT EXACT HR+ in 2D mode.

The radionuclide 86Y potentially allows for the precise assessment of tissue radioactivity biodistribution and, thus, extrapolation of a therapeutic dose of 90Y-labeled compounds. A method to obtain quantitative images from 86Y-PET measurements after a background correction and a recalibration is presented. Cylinder and body phantom measurements with 18 F and 86Y using an ECAT EXACT HR+ tomograph were performed in 2D mode.

Levels and pattern of volatile organic nitrates and halocarbons in the air at Neumayer Station (70 degrees S), Antarctic.

Levels and patterns of C1-C4/C9 organic nitrates were measured for the first time in Antarctica. The sampling was done by adsorptive enrichment on Tenax TA followed by thermodesorption cold-trap high resolution capillary gas chromatography with electron capture detection. 2-70 1 air on-column have been analyzed this way.

Dissociating a common working memory network from different neural substrates of phonological and spatial stimulus processing.

Positron emission tomography was used to investigate common versus specific cortical regions for the maintenance of spatial versus phonological information in working memory (WM). Group and single-subject analyses of regional cerebral blood flow during a new 2 x 2 factorial n-back task were performed. Eight subjects had to memorize either phonological features or the location of serially presented syllables.