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• W2061230879 abstract "A mobile gamma camera dedicated to nuclear cardiology, based on a 15 cm×15 cm detection matrix of 2304 CdTe detector elements, 2.83 mm×2.83 mm×2 mm, has been developed with a European Community support to academic and industrial research centres. The intrinsic properties of the semiconductor crystals – low-ionisation energy, high-energy resolution, high attenuation coefficient – are potentially attractive to improve the γ-camera performances. But their use as γ detectors for medical imaging at high resolution requires production of high-grade materials and large quantities of sophisticated read-out electronics. The decision was taken to use CdTe rather than CdZnTe, because the manufacturer (Eurorad, France) has a large experience for producing high-grade materials, with a good homogeneity and stability and whose transport properties, characterised by the mobility–lifetime product, are at least 5 times greater than that of CdZnTe. The detector matrix is divided in 9 square units, each unit is composed of 256 detectors shared in 16 modules. Each module consists in a thin ceramic plate holding a line of 16 detectors, in four groups of four for an easy replacement, and holding a special 16 channels integrated circuit designed by CLRC (UK). A detection and acquisition logic based on a DSP card and a PC has been programmed by Eurorad for spectral and counting acquisition modes. Collimators LEAP and LEHR from commercial design, mobile gantry and clinical software were provided by Siemens (Germany). The γ-camera head housing, its general mounting and the electric connections were performed by Phase Laboratory (CNRS, France). The compactness of the γ-camera head, thin detectors matrix, electronic readout and collimator, facilitates the detection of close γ sources with the advantage of a high spatial resolution. Such an equipment is intended to bedside explorations. There is a growing clinical requirement in nuclear cardiology to early assess the extent of an infarct in intensive care units, as well as in neurology to detect the grade of a cerebral vascular insult, in pregnancy to detect a pulmonary capillary embolism, or in presurgical oncology to identify sentinel lymph nodes. The physical tests and the clinical imaging capabilities of the experimental device which have been performed by IPB (France) and SHC (Hungary), agree with the expected performances better than those of a cardiac conventional γ- camera except for dynamic studies." @default.
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• W2061230879 title "A pixellated γ-camera based on CdTe detectors clinical interests and performances" @default.
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• W2061230879 doi "https://doi.org/10.1016/s0168-9002(00)00285-0" @default.
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