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Respiratory motion during PET acquisition from the chest/abdomen leads to significant image degradation. Combined PET/MR scanners open up the opportunity to correct motion using MR data acquired simultaneously with PET. As simultaneous human chest/abdomen PET/MR images are currently unobtainable, in this preliminary study we determined motion parameters from respiratory-gated MR and then used these...
We have implemented a scheme for simulating realistic dynamic PET data from real MR acquisitions. This toolkit uses a series of MR acquisitions, image registrations and segmentations. PET images are simulated assigning typical values to the segmented images, and manually inserting additional lesions. The data are simulated using analytic forward-projections (including attenuation) with STIR, providing...
Computed tomography (CT) is used for the attenuation correction of positron emission tomography (PET) to enhance the efficiency of data acquisition process and to improve the quality of the reconstructed PET data in the brain. Due to the use of two different modalities, chances of misalignment between PET and CT images are quite significant. The main cause of this misregistration is the motion of...
The digital human project aims at the building of whole human body datasets, from nano to macro, including cells, DNA, tissues, organs and the systems. This paper presents the construction of virtual Chinese human(VCH) dataset, including data acquisition, image preprocessing, image registration, ROI segmentation and 3D visualization. Almost all the main anatomical structures in human body have been...
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