In this work, 4D MRI extracted elastic transformations were applied to list-mode data either inside the image reconstruction or to the reconstructed respiratory synchronized images to obtain respiration corrected PET images.
However, since the reconstruction proceeds by synchronizing image sequences recursively from one imaging plane to the next, this method is susceptible to error propagation.
To synchronize image acquisition and electrical recordings, we sampled the 5 V pulse (FVAL) that signals active exposure of the CCD camera [ 46].
It was also recorded on a video tape through a D/A converter PCI-33366; Interface, Hiroshima, Japan) and used to synchronize image capture to the stimulus onset.
Hence, one function per coordinate is finally estimated, and ∆ can be reformulated as follows: Δ = Δx x d, D, Δy y d, D (2) Figure 5 Synchronized images of the two cameras.
Time synchronization is performed as a moving localized activity such that the inner nodes are well synchronized before image processing module passes messages among SNs as shown in Figure 4.
Two illumination paradigms, synchronized with image acquisition, were used: P1, consisting of repeated light∶dark periods (12 s∶110 s, a single image/light period); and P2, consisting of continuous 600 s illumination (16 images/light period).
Through the use of a trigger pulse from the wave generator, the computer synchronizes image acquisition by the camera at the instance the computer drives the strobe lights to illuminate the field of view.
The software allows the user to set up a large variety of acquisition scenarios, automatically acquires and stores the image stacks and synchronizes image acquisition with the stepping of the monochromator on the synchrotron beam line.
