Biomedical Engineering Reference
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FIGURE 4.3: F
18
-FDG PET image (glucose metabolism) with pathological
uptake in a lymph node (arrow). Without correction for photon attenuation
(right) the increased uptake may have been missed.
FIGURE 4.4: Tc
99m
SPECT image of a homogeneously filled 20 cm cylin-
der phantom. Reconstructed using scatter and attenuation correction (top),
attenuation correction without scatter correction (middle), and without any
correction (bottom). The profiles at the right side are measured along a hori-
zontal line through the center of the phantom.
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