This region was obtained by drawing 1-cm-diameter circular regions of interest (ROIs) over the AA in at least five consecutive transaxial images of an early frame of the dynamic scan, i.e. the frame in which the first pass of the bolus through the AA was best visible [34].
First, that unmistakable mug – the ingenuous eyes, the gappy smile, the newsreader hair – filling the screen in the earliest frame of the title sequence.
These studies consistently showed enhanced amplitudes of the P300 (combined for all studies: 280 520 ms) and early time frames of the LPP (combined for all studies: 428 800 ms) in phobics relative to controls during exposure.
Image-derived input functions (IDIFs) were generated for both [15O]H2O and [18F]FLT scans, using the early frames in which the first pass of the bolus was best visualised: VOIs of 2 × 2 voxels were positioned in five consecutive axial planes within the lumen of the ascending aorta.
There were no therapy-related changes in response to spider pictures in earlier time frames of the ERP (i.e., the P300), possibly reflecting that it is difficult to change the fast, reflexive attentional capture by spiders in spider phobics.
The early frames were usually of ivory, silver, ebony, or tortoiseshell or were veneered with marquetry of walnut, olive, and laburnum.
Early frames showed accumulation of FDG in discoid structures superior to the catheter tip, the location and size of the accumulation being consistent with the placentae of the left uterine horn.
Early framing by advocates of the global mental health problem emphasised biological disease, linked psychiatry with neurology, and reinforced categories of mental health disorders.
Vessel detection is performed on the subtracted images at the first post-contrast time point due to the maximum contrast enhancement of vessels in the early frames.
