Motion correction was then performed with INRIalign (Freire et al. 2002) using the first scan of each run as the reference.
using standardized procedures (Friston et al., 1994; Friston, 2007), including realignment for head movements using the first scan of each participant as a reference, and spatial warping to a standardized anatomic space (Talairach and Tournoux, 1988), by matching each realigned image to the PET template of the Montreal Neurological Institute (MNI) (Friston et al., 1995).
The imaging results by using the first scanning protocol were demonstrated below.
Before giving the imaging results using the first scanning protocol, we present a comparison of results obtained using single camera-based and dual-camera based spectrometers, respectively.
Because four patients developed LID already during the second scan after levodopa intake (post-levodopa Scan 2), we only used the first scan after levodopa intake (post-levodopa Scan 1) for assessing the gradual network response to dopamine in patients with and without the subsequent onset of LID.
PET data acquired on the PET-MR system were attenuation corrected by three different methods: (top) AC1 using the CT scan from each increasing step in GBCA, (middle) AC2 by using the first CT scan with no GBCA present, and (bottom) AC3 from a manually generated attenuation map where all voxels have LAC = 0.1 cm−1.
To investigate a forecasting method developed to predict first trimester pregnancy outcomes using the first routine ultrasound scan for early pregnancy on days 27 29 after ET and to determine whether to perform a repeated scan several days later based on this forecasting method.
Pre-processing included realignment and unwarping using the first volume as the reference scan (after excluding the first four dummy scans to allow for T1 equilibration effects), spatial normalisation to a standard MNI template (Friston et al., 1995), and spatial smoothing using a 6mm full width half maximum isotropic Gaussian kernel.
The algorithms used in the first scan image operation are classified into two types as pixel-based and block-based scan masks.
Prone position was the first acquisition position when intravenous contrast was used and the second scan position when only unenhanced acquisitions were performed.
