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By Brown E. W.

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Weisenberger A. , Bradley, E. L. , SPECT-CT system for small animal imaging. IEEE Trans Nucl Sci 50: 74-79 (2003). 120. Welsh R. , Bradley, E. L. , ‘‘An economical dual-modality small animal imaging system with application to studies of diabetes’’ IEEE Nuclear Science Symposium and Medical Imaging Conference Record, Vol. 3; pp 1845-1848 (2002). 121. MacDonald L. , Iwanczyk, J. , Patt, B. E. , ‘‘Development of new high resolution detectors for small animal SPECT imaging’’ IEEE Nuclear Science Symposium and Medical Imaging Conference Record, Vol.

A specific implementation of a combined emission-transmission scanner was disclosed by Mirshanov54 who produced an engineering concept diagram showing a semiconductor detector to record radionuclide emission data and a strip scintillator to record coregistered x-ray transmission data from a patient (Figure 1). 55 proposed a high performance scintillation camera to record both emission data from an internal radionuclide source and transmission data from an external x-ray source. 23,26,57,58 at the University of California, San Francisco, pioneered the development of dedicated emission/transmission imaging systems which could record both radionuclide and x-ray data for correlated functional/structural imaging.

12. Beekman F. , Hutton, B. F. , Half-fanbeam collimators combined with scanning point sources for simultaneous emission-transmission imaging. J Nucl Med 39: 1996-2003 (1998). 13. Formiconi A. , Geometrical response of multihole collimators. Phys Med Biol 43: 3359-3379 (1998). 14. , Binnie, D. , Flower, M. A. , Monte Carlo modelling of the performance of a rotating slit-collimator for improved planar gamma-camera imaging. Phys Med Biol 37: 1095-1108 (1992). 15. Zeng G. L. , CdZnTe strip detector SPECT imaging with a slit collimator.

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An Explanation of the Gaps in the Distribution of the Asteroids According to Their Periods of Revolution by Brown E. W.


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