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Respiratory motion can degrade PET image quality and various correction approaches have been investigated. A novel method, applicable to simultaneous PET-MR is to measure the motion with the MR and correct the PET data with the known motion fields. This study investigates the effectiveness of motion correction for PET-MR acquisition with phantom studies. It incorporates the improved motion estimation...
The validation of the PET image quality of new PET-MRI systems should be done against the image quality of currently available PET-CT systems. This includes the validation of new attenuation correction methods. Such validation studies should preferentially be done using a phantom. There are currently no phantoms that have a realistic appearance on PET, CT and MRI. In this work we present the design...
Combined MRI and PET systems are currently being developed by a number of research groups and also commercially. Most systems have been designed to permit the simultaneous acquisition of MRI and PET data. The approach taken by many groups, is to build an MRI compatible PET insert, that works inside a standard MRI scanner. Unlike other multi-modality imaging systems such as PET/CT, the physical location...
The aim of this study is to develop a MR compatible PET that is insertable to MRI and allows simultaneous PET and MR imaging of human brain. The brain PET having 72 detector modules arranged in a ring of 330 mm diameter was designed. Each PET module composed of 4 ? 4 matrix of 3 mm ? 3 mm ? 20 mm LYSO crystals coupled to a tileable 4 ? 4 array Geigermode avalanche photodiode (GAPD) and designed to...
Position Emission Tomography (PET) allows the in-vivo monitoring of functional processes in the body. However its limited spatial resolution induces Partial Volume Effect (PVE), which leads to a loss of signal in tissues of size similar to the Point Spread Function (PSF) of the imaging device and induces activity spillover between adjacent structures with different amounts of activity. The aim of...
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