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FIGURE 9. In 18F-fluoride PET bone scan without attenuation correction (top row, with coronal, sagittal, and transverse slices appearing from left to right), streak artifact caused by activity in renal collecting system leads to apparent loss of signal in right lumbar spine (solid arrows). Apparent increased signal in thoracic spine results from reduction of attenuation in lung region (open arrow). Both artifacts are greatly reduced when attenuation correction is applied using rotating rod sources of 68Ge/68Ga (middle row). After patient voided, repeated image (bottom row) acquired in single bed position shows resolution of artifact caused by activity in renal collecting system.
