Biomedical Engineering Reference
In-Depth Information
(A)
(B)
Figure 2.5: (A) Axial cross-section of a PET scanner with septa in-place for
two-dimensional data acquisition. (B) Axial cross-section of a PET scanner with
septa retracted for three-dimensional data acquisition.
Ring of Detectors
Sinogram
y
q
r
x
q
q
r = x cos
+ y sin
Radial distance ( r )
(A)
(B)
Figure 2.6: Schematic diagram showing how projection data is acquired (A)
and stored in the sinogram (B) for two-dimensional PET imaging.
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