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Spatial resolution different scanners

Figure 6.1. Positrons travel a distance before annihilation in the absorber and the distance increases with positron energy. Since positrons with different energies travel in zigzag directions, the effective range is the shortest distance between the nucleus and the direction of 511 keV photons. This effective range degrades the spatial resolution of the PET scanner. (Reprinted with the permission of The Cleveland Clinic Center for Medical Art Photography 2009. All Rights Reserved)... Figure 6.1. Positrons travel a distance before annihilation in the absorber and the distance increases with positron energy. Since positrons with different energies travel in zigzag directions, the effective range is the shortest distance between the nucleus and the direction of 511 keV photons. This effective range degrades the spatial resolution of the PET scanner. (Reprinted with the permission of The Cleveland Clinic Center for Medical Art Photography 2009. All Rights Reserved)...
The detailed method of measuring the spatial resolution of a PET scanner is given later in this chapter. The spatial resolutions of PET scanners from different manufacturers are given in Table 6.1. [Pg.100]

Micro-CT appears a useful tool for scanning ex vivo, fixed mouse lungs with sufficient spatial resolution and tolerable levels of noise because there are no temporal constraints on image acquisition. There are no motion artifacts or fluid shifts which can occur with in situ lung scans. Thus, for instance, it is possible to use the 9 p,m pixel resolution protocol of the Skyscan 1076 scanner. Optimized protocols for fixed mouse lung with different spatial resolutions are also being developed. The basic characteristics of the 9 fim protocol are scanning time 120 min, no filter, 50 kV and 200 p.A. [Pg.155]

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See also in sourсe #XX -- [ Pg.109 ]



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Spatial resolution

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