4 th International Conference on Imaging Technologies in Biomedical Sciences
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چکیده
While the Anger gamma camera was dominant for several decades for nuclear medicine imaging, there are a number of significant developments in progress. The large increase of the usage of PET scanners has been a result of new detector materials such as LSO, GSO, YAP etc, improved electronics and algorithms such as list mode reconstruction and in particular the combination with CT. Finally although investigated many years ago, reliable time of flight scanners have been introduced, with the corresponding reconstruction algorithms. μPET and μSPECT systems are also now widely available, where the use of multiple pinholes for μSPECT has resulting in resolutions of the order of 0.1mm to be in reached. Solid state pixelated detectors are also of considerable interest including CaZnTe, LnBr, and CCD arrays. Readout of such finely cut pixelated arrays is often via the dual usage of PMT and APDs (or now SiPMs). One use of such detector arrays in the Compton camera one example of which has been developed at UCL. There is also considerable interest in simultaneous radioisotope tracer + MRI imaging. Another development being pursued at UCL is that of combined mammographic X-ray, scintigraphic and optical imaging. An additional driver particular for the small animal system has been that of so-called molecular imaging and the exploration of cellular/ molecular chemistry and gene expression and therapy. On the processing side in addition to improved tomographic reconstruction, the goal is still that of improved quantitative accuracy and functional modelling. Partial volume correction has been addressed by a number of groups (e.g. PVELab) with some success. Finally motion and breathing correction has been addressed using MRI based models and intelligent gating or list mode image formation. These advances in instrumentation and data handling together with the inherent power of tracer technology has resulted in the increasing use of nuclear medicine/ molecular imaging methods in modern medicine. ITBS-2007 Book of Abstracts
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تاریخ انتشار 2007